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DETAILS OF LIGHTING DEVICES, OF GENERAL APPLICATION
Definition statement
This subclass/group covers:

Details of parts involved in light emission or distribution

Details of those parts not involved in light emission or distribution, e.g. fittings

Special adaptation related to the use of a non-electric light sources

References relevant to classification in this subclass
This subclass/group does not cover:
Details of light guides adapted for lighting devices or systems
Special rules of classification within this subclass

¨Invention information" is identified with ECLA symbols, whereas "additional information" is identified with Indexing Code symbols

Shades for light sources [N: i.e. lampshades for table, floor, wall or ceiling lamps]
rigid (F21V 1/08 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Adjustable frame of a shade for light source
foldable or collapsible
Informative references
Attention is drawn to the following places, which may be of interest for search:
Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages, with provision for shipment or storage
adjustable
Informative references
Attention is drawn to the following places, which may be of interest for search:
Changing the characteristics or distribution of the light emitted by adjustment of parts
Rotating shades
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

Example: US1972687

Rotating glass cover or globe or shade or fins due to heat of a light source

Covers for frames; Frameless shades
Definition statement
This subclass/group covers:

Shades characterised by the material

Stretched fly attached to a ceiling frame

Example: FR2952087

A stretched fly attached to a ceiling frame

Globes; Bowls; Cover glasses (with refracting properties F21V 5/00; with reflecting properties F21V 7/00)
Definition statement
This subclass/group covers:

Globes for street lighting devices

Glass cover for automotive vehicles

Globes, bowls, cover glasses characterised by their shapes

Globes, bowls, cover glasses characterised by material, coatings or surface treatments

References relevant to classification in this group
This subclass/group does not cover:
With refracting properties
With reflecting properties
Informative references
Attention is drawn to the following places, which may be of interest for search:
Transparent cover plates for vehicle headlamps and rear lamps
Refractors for light sources [N: (for vehicle rear lights F21S 48/2212; for vehicle head lamps F21S 48/1225 )]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Producing optical elements, e.g. lenses, prisms (grinding or polishing of optical elements B24B; constructional form of optical elements G02B; optical parts of spectacles G02C 7/00)
Refractors for vehicle headlamps and rear lamps
Combinations of only two kinds of elements being reflectors and refractors
Combinations of only three kinds of elements being reflectors, refractors, and filters
Changing the characteristics or distribution of the light emitted by adjustment of parts by movement of refractors
Details of kinds concerned with light emission or distribution solely applicable to the electric portable lighting devices
Optical elements
[N: Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V 5/008 )]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Simple or compound lenses; Arrays
of prismatic shape (F21V 5/04 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Refractor of lens shape
of lens shape
Informative references
Attention is drawn to the following places, which may be of interest for search:
Simple or compound lenses
G02B 3/00
G02B17/09F
Optical system adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibres
G02B17/09F
[N: the lens having discontinuous faces, e.g. Fresnel lenses]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
[N: the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

Example: WO0186198

[N:the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

Ex.: WO2007045242

producing an asymmetric light distribution
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

Ex.: US2009225551

Reflectors for light sources [N: (for vehicle rear lights F21S 48/23; for vehicle head lamps F21S 48/1317 )]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of kinds concerned with light emission or distribution solely applicable to the electric portable lighting devices
Reflectors for vehicle headlamps or rear lamps
Combinations of two kinds of elements one being of reflector and on of the following: refractor, filter or screen
Combinations of three kinds of elements being reflectors, refractors, and filters
Changing the characteristics or distribution of the light emitted by adjustment of parts by movement of reflectors
System with reflecting surfaces using mirrors only, for light condensing, e.g. for use with a light emitter
Systems with reflecting surfaces, with or without refracting elements for light condensing, e.g. for use with a light emitter
Optical elements other than lenses: Mirrors
Projectors or projection-type viewers: Reflectors in projection beam
[N:providing for indirect lighting]
Definition statement
This subclass/group covers:

The lighting devices emitting light towards the ceiling and not toward the surface of interest to be lit

Lighting devices, the light beams of which are not being directed directly toward the aim, e.g. by means of reflectors

Illustrative example of subject matter classified in this group.

Example: US3671735

Example: US2744192

[N: Combination of two or more reflectors for a single light source]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

US1300202

US1286535

References relevant to classification in this group
This subclass/group does not cover:
Array of reflectors for a cluster of light sources
[N: with an elongated shape to cooperate with linear light sources]
Definition statement
This subclass/group covers:

Elongated reflective surface with its axis parallel to the axis of an elongated light emitter.

Plurality of reflective surfaces along an axis parallel to the axis of one elongated light emitter.

References relevant to classification in this group
This subclass/group does not cover:
Plurality of reflective surfaces along an axis parallel to the axis of an light source formed of a plurality of light emitters, each light emitter corresponding to an individual reflective surface, i.e. array of light sources
Special rules of classification within this group

In this group, it is desirable to add the Indexing Codes of F21Y 2103/00

[N:adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources]
Special rules of classification within this group

In this group, it is desirable to add the Indexing Codes of F21Y 2103/02

[N:specially adapted to co operate with point like light sources; specially adapted to co operate with light sources the shape of which is unspecified (F21V 7/16 to F21V 7/22 take precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Construction of reflector with provision for adjusting the curvature
Construction of reflector with provision for folding or collapsing
Reflector constructed to facilitate cooling
Reflector characterised by the material; characterised by surface treatments or coatings
[N: Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane (combination of two or more reflectors F21V 7/0025)]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.US2010328938: Plurality of individually removable identical reflectors on a planar matrix of LEDs

Informative references
Attention is drawn to the following places, which may be of interest for search:
Combination of two or more reflectors for a single light source
[N:using total internal reflection]
Definition statement
This subclass/group covers:

Reflectors for rear vehicle light using total internal reflection.

Refractors having surfaces used for total internal reflection.

References relevant to classification in this group
This subclass/group does not cover:
Reflectors for vehicle headlamps using total internal reflection
F21V7/00M4
Informative references
Attention is drawn to the following places, which may be of interest for search:
Systems with reflecting surfaces, with or without refracting elements; Catadioptric systems for use with light emitter
Special rules of classification within this group

Reflectors for rear vehicle light using total internal reflection have to be also classified in F21V7/00Q

Refractors having surfaces used for total internal reflection have to be also classified in F21V 5/00

Optical design (F21V 7/22 takes precedence)
Definition statement
This subclass/group covers:

Reflector for which the surface is defined by mathematical formulae.

with a combination of different curvatures
Definition statement
This subclass/group covers:

Also reflector surfaces with asperities

with provision for folding or collapsing
Definition statement
This subclass/group covers:

Illustrative examples of subject matter classified in this group.

e.g.DE202004011140U

constructed to facilitate cooling, e.g. with fins (cooling by other means, e.g. fluid, F21V 29/00)
Definition statement
This subclass/group covers:

Illustrative examples of subject matter classified in this group.

e.g.JP2011228265

e.g.DE102004042186

Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling by other means
Special rules of classification within this group

F21V 7/20 is given in combination with the appropriate group in F21V 29/00

characterised by the material; characterised by surface treatments or coatings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Multilayer mirrors
Surface treatment of glass, at least one coating being a metal
Light filters (coloured shades F21V 1/00); Selection of luminescent materials for light screens (luminescent materials per se C09K 11/00; electroluminescent light sources H05B 33/00)
References relevant to classification in this group
This subclass/group does not cover:
Coloured shades
Informative references
Attention is drawn to the following places, which may be of interest for search:
Luminescent materials per se
Filters for vehicle headlamps or rear lamps
Combination of only two kinds of elements being reflectors and filters
Combination of only three kinds of elements being reflectors, refractors and filters
Changing the characteristics or distribution of the light emitted by adjustment of parts by movement of screens
Details of kinds concerned with light emission or distribution solely applicable to the electric portable lighting devices; Arrangements of coloured filters or screens
for simulating daylight (F21V 9/04, F21V 9/06, F21V 9/16 take precedence)
Definition statement
This subclass/group covers:

False windows are also covered by this subgroup

References relevant to classification in this group
This subclass/group does not cover:
Light filters for filtering out infra-red radiatio
Light filters for filtering out ultra-violet radiation
Light filters; Selection of luminescent materials for screens
for filtering out infra-red radiation (using liquid-filled chambers F21V 9/12)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Light filters for producing coloured light with liquid-filled chambers
for filtering out ultra-violet radiation (F21V 9/16 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Light filters; Selection of luminescent materials for screens
for producing coloured light, e.g. monochromatic; for reducing intensity of light (F21V 9/16 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Light filters; Selection of luminescent materials for screens
Informative references
Attention is drawn to the following places, which may be of interest for search:
Radiation therapy using light characterised by the wavelength of light used; Coloured visible light
with provision for variation of the colour or intensity (F21V 9/12 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Light filters for producing coloured light with liquid-filled chambers
Screens not covered by groups F21V 1/00, F21V 3/00, F21V 7/00 or F21V 9/00
Informative references
Attention is drawn to the following places, which may be of interest for search:
Screens, light shielding members for vehicle headlamps
Combination of only two kinds of elements being reflectors and screens
Changing the characteristics or distribution of the light emitted by adjustment of parts by movement of screens
using parallel laminae or strips, e.g. of Venetian-blind type (F21V 11/06 takes precedence)
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.US2010142197

References relevant to classification in this group
This subclass/group does not cover:
Screens using crossed laminae or strips
adjustable
Definition statement
This subclass/group covers:

Adjustable lamellae

Illustrative example of subject matter classified in this group.

e.g.DE9420171U

Informative references
Attention is drawn to the following places, which may be of interest for search:
Changing the characteristics or distribution of the light by movement of screens
using crossed laminae or strips; [N: e.g. grid-shaped louvers]; using lattices or honeycombs
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.WO2010007504

with many small apertures
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g. US7588345

Polymeric light control film with holes on an elongated light source

using sheets without apertures, [N: i.e. masks for shielding light,]e.g. fixed (F21V 11/02, F21V 11/06 take precedence; [N: for vehicle head lamps F21S 48/145 ])
References relevant to classification in this group
This subclass/group does not cover:
Screens using parallel laminae or strips
Screens using crossed laminae or strips
movable, e.g. flaps, slides
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.WO2009096472

Light-shielding plates for stage projectors

Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V 1/00F21V 11/00 (by means of a combination of two or more elements covered by a single one of main groups F21V 1/00F21V 11/00, see the relevant group; changing the characteristics or distribution of the light emitted by adjustment of parts F21V 14/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:
By means of a combination of reflectors and refractors for vehicle rear lamps
By means of a combination of two or more elements covered by a single one of main groups F21V 1/00-F21V 11/00
Changing the characteristics or distribution of the light emitted by adjustment of parts
Details of kinds concerned with light emission or distribution solely applicable to the electric portable lighting devices
Combinations of only two kinds of elements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Systems with reflecting surfaces, with or without refracting elements for light condensing, e.g. for use with a light emitter
the elements being reflectors, refractors and filters
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.DE550107C

Changing the characteristics or distribution of the light emitted by adjustment of parts or by interposition of elements with electrically controlled variable light transmissivity (reflectors with provision for adjusting the curvature F21V 7/16; light filters with provision for variation of colour or intensity F21V 9/10; screens using iris-type diaphragms F21V 11/10; adjustable mountings for lighting devices F21V 21/14)
References relevant to classification in this group
This subclass/group does not cover:
Reflectors with provision for adjusting the curvature
Light filters with provision for variation of colour or intensity
Screens using iris-type diaphragms
Details regarding the mechanism for the adjustment of components of the lighting device
Details regarding the mechanism for the adjustment of the lamp holder or the light source
Adjustable mountings for lighting devices
Adjustable vehicle headlamp housing
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of kinds concerned with light emission or distribution solely applicable to the electric portable lighting devices
Special rules of classification within this group

Details regarding the mechanism for the adjustment of components of the lighting device F21V 17/02, it is the desirable to give the Indexing Code of F21V 14/04, F21V 14/06 or F21V 14/08

Details regarding the mechanism for the adjustment of the lamp holder or the light source F21V 19/02, it is then desirable to give the Indexing Code F21V 14/02

[N:by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices (liquid crystal elements G02F 1/13)]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid crystal elements
In vehicle headlamps
by movement of screens [N: or filters]
Definition statement
This subclass/group covers:

Changing characteristic or distribution of light by movement of screens or filters

Informative references
Attention is drawn to the following places, which may be of interest for search:
In vehicle headlamps
F21S8/17S2
Adjustable lamellae
Movable screens being sheets without apertures
Protecting lighting devices from damage [N: (gas-tight or water tight arrangements F21V 31/00 )]
Definition statement
This subclass/group covers:

Protecting lighting devices from damage due to external interactions, e.g. anti-vandalism devices, cages

References relevant to classification in this group
This subclass/group does not cover:
Gas-tight or water-tight arrangements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling or heating arrangements
Housings, e.g. material or assembling of housing parts (F21V 15/02 takes precedence; [N: housings forming signs or letters G09F 13/04 ])
References relevant to classification in this group
This subclass/group does not cover:
Cages for protecting lighting devices from damage
Housings forming signs or letters
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lighting device essentially made of an elongated section for suspending at least one linear light source
F21S8/00H
Casings, cabinets or drawers for electric apparatus
[N:the housing being an extrusion]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lighting devices or systems using a string or strip of light sources Strings rigidly mounted on a frame
F21S4/00A
Cages
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.US2010061111

Resilient mountings, e.g. shock absorbers (in general F16F 15/04; [N: shock absorbing devices of vehicle headlamp housings B60Q 1/0491 ])
References relevant to classification in this group
This subclass/group does not cover:
Shock absorbing devices of headlamp housings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Shock absorbing devices in general
Details of lighting devices employing liquid fuel as light source, not otherwise provided for; Fastening or safety devices for reflectors, cover glasses or chimneys; Protections against shocks
Thermal insulation [N: (for vehicle head lamps F21S 48/32 )]
Definition statement
This subclass/group covers:

Means for screening the heat, e.g. screen for heat radiation

Informative references
Attention is drawn to the following places, which may be of interest for search:
Through holes in printed circuit board to screen conductive heat transfer from on one part to the other
Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages (of light sources or light holders F21V 19/00; gas-tight or water-tight arrangements F21V 31/00) [N: for vehicle rear lights F21S 48/20; for vehicle head lights F21S 48/10 ])
References relevant to classification in this group
This subclass/group does not cover:
Fastening of component parts of vehicle headlamps
Fastening of component parts of vehicle signal lamps
Fastening of light sources or light holders
For gas-tight or water-tight arrangements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Fastening or lifting of the lamp glass of lanterns
[N:with provision for shipment or storage]
Definition statement
This subclass/group covers:

Components of lighting devices intended to be easily dismounted or with reduced dismounted volume for shipment or storage

Informative references
Attention is drawn to the following places, which may be of interest for search:
Receptacles with Roll-up holders with pockets for separates articles (personal use); Not limited to lamps
Packaging for ampoules, lamp bulbs (for sale)
Supports or holders for coiled, wound or folded material
Machines, apparatus or devices for or method of packaging or material; unpacking
Foldable or collapsible frames for shades for light sources
Construction of reflector with provision for folding or collapsing
Packaging for ampoules or lamp bulbs, e.g. for sale
Supports or holders for coiled, wound or folded material
with provision for adjustment (F21V 17/04, F21V 17/06, F21V 17/08 take precedence)
Definition statement
This subclass/group covers:

Details regarding the mechanism for the adjustment

e.g.US3671735

References relevant to classification in this group
This subclass/group does not cover:
Fastening of component parts of lighting devices, the fastening being onto or by the light source
Fastening of component parts of lighting devices, the fastening being onto or by the lampholder
Fastening of component parts of lighting devices, onto the supporting or suspending arrangements of the lighting device, e.g. power cords, standards
Special rules of classification within this group

Always provide also the information which component is concerned by giving the relevant Indexing Code F21V 5/00-F21V 9/00; if the focus is on the change in the characteristics or distribution of the light emitted give also the Indexing Code R21

the fastening being onto or by the light source
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.WO2010078339

the fastening being onto or by the lampholder
Definition statement
This subclass/group covers:

e.g.US1293909

Electric light-globe holder

e.g.US2010046238

Outer shell structure of a decoration lamp string

characterised by specific fastening means or way of fastening (F21V 17/02 to F21V 17/08 take precedence)
References relevant to classification in this group
This subclass/group does not cover:
Fastening of component parts of lighting devices with provision for adjustment
Fastening of component parts of lighting devices, the fastening being onto or by the light source
Fastening of component parts of lighting devices, the fastening being onto or by the lampholder
Fastening of component parts of lighting devices, onto the supporting or suspending arrangements of the lighting device, e.g. power cords, standards
[N:permanently, e.g. welding, gluing or riveting]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Joining or sealing of preformed parts, welding of plastics materials
Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting
Fastening of light sources or lampholders (fastening electric light source solely by the coupling device H01R 33/00; [N: special means for attaching the candle to the candle holder F21V 35/003 ])
References relevant to classification in this group
This subclass/group does not cover:
Fastening electric light sources in vehicle headlamps
Fastening electric light sources in vehicle signal lamps
Special means for attaching the candle to the candle holder
Fastening electric light source solely by the coupling device
[N:of sources having contact pins, wires or blades, e.g. pinch sealed lamp (F21V 19/001 takes precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Fastening of removably mounted LEDs; Fastening of removably mounted PCBs holding light sources
[N:Fastening of removably mounted LEDs; Fastening of removably mounted PCBs holding light sources (F21S8/11A2, F21S 48/212 take precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Fastening of light sources or lampholders: Details of lamp holders, terminals or connectors for vehicle headlamps
Fastening of light sources or lampholders: Details of lamp holders, terminals or connectors for vehicle rear lights
Informative references
Attention is drawn to the following places, which may be of interest for search:
Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
Synonyms and Keywords

In patent documents the following abbreviations are often used:

PCB
Printed Circuit Board
LED
Light Emitting Diode
[N:of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base (of sources having contact pins, wires or blades F21V 19/0005; of LEDs or sources mounted on printed-circuit board F21V 19/001]
References relevant to classification in this group
This subclass/group does not cover:
Fastening of light sources or lampholders of sources having contact pins, wires or blades
Fastening of removably mounted LEDs; Fastening of removably mounted PCBs holding light sources
Synonyms and Keywords¨

In patent documents the following abbreviations are often used:

LED
Light Emitting Diode
[N:of tubular light sources, e.g. ring-shaped fluorescent light sources]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Holders formed as intermediate parts for linking a counter-part to a coupling part for tubular fluorescent lamps
[N:at least one conductive element acting as a support means, e.g. resilient contact blades, piston-like contact]
Relationship between large subject matter areas

This group does not cover coupling devices in which a holder is adapted for supporting apparatus to which its counterpart is attached or separate parts thereof, see H01R 33/08: Two-pole devices for supporting tubular fluorescent lamps.

with provision for adjustment, e.g. for focusing
Definition statement
This subclass/group covers:

Details regarding the mechanism for the adjustment of the light source or lampholder

Informative references
Attention is drawn to the following places, which may be of interest for search:
Changing the characteristics or distribution of the light emitted by movement of light sources
Special rules of classification within this group

If the focus is on the change in the characteristics or distribution of the light emitted give also F21V 14/02

with provision for changing light source, e.g. turret [N: (auxiliary devices for cleaning, placing, or removing incandescent lamps H01K 3/32, fluorescent lamps H01J 9/006)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Auxiliary devices for cleaning, placing, or removing incandescent lamps
Auxiliary devices for cleaning, placing, or removing fluorescent lamps
Supporting, suspending, or attaching arrangements for lighting devices (F21V 17/00, F21V 19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M 11/00); Hand grips
References relevant to classification in this group
This subclass/group does not cover:
Fastening of component parts of lighting devices
Fastening of light sources or lampholders
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general
Stands for supporting apparatus or articles in general
making direct electrical contact, e.g. by piercing (F21V 21/35 takes precedence)
Definition statement
This subclass/group covers:

The housing of the lighting device or lampholder is equipped with needle contacts to pierce the cable insulator to connect while attaching the housing or lampholder to the cable.

e.g.WO2007023261

References relevant to classification in this group
This subclass/group does not cover:
Supporting elements displaceable along a guiding element with direct electrical contact between the supporting element and electric conductors running along the guiding element
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electrically-conductive connections between two or more conductive members in direct contact and means for effecting or maintaining such contact; Needle-point, slotted plate, or analogous contact members penetrating insulation or cable strands having at least one tooth, prong, pin or needle penetrating the insulation
for several lighting devices in an end-to-end arrangement, i.e. light tracks
Definition statement
This subclass/group covers:

Housing of lighting devices mechanically in side-by-side or end-to-end contact

e.g.EP2012054

Informative references
Attention is drawn to the following places, which may be of interest for search:
Systems of lighting devices, not provided for in main groups F21S 4/00 to F21S 10/00 or F21S 19/00
Lighting devices or systems using a string or strip of light sources being lighting strips
F21S4/00C
Suspending from a cable or suspension line
Definition statement
This subclass/group covers:

Details of the suspending means from a cable or suspension line

Informative references
Attention is drawn to the following places, which may be of interest for search:
Lighting devices intended for fixed installation intended only for mounting on a ceiling or like overhead structure
Wall, ceiling, or floor bases; Fixing pendants or arms to the bases (F21V 21/08 takes precedence; bases for movable standing lamps F21V 21/06)
References relevant to classification in this group
This subclass/group does not cover:
Supporting, suspending, or attaching arrangements for lighting devices; Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
Informative references
Attention is drawn to the following places, which may be of interest for search:
Bases for movable standing lamps
Installation of electrical cables or lines in buildings / Details / Distribution boxes / ceiling roses or other lighting sets
Ceiling bases, e.g. ceiling roses (F21V 21/04 takes precedence)
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.FR2186626

Recessed bases
Definition statement
This subclass/group covers:

Details of the fastening means for a recessed lighting device

e.g.WO2010/135928

e.g.WO2009109049

e.g.US2010110705

Hanger bar for recessed lighting fixtures

Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
Special rules of classification within this group

Generally no classification in F21S 8/02

Bases for movable standing lamps; Fixing standards to the bases (F21V 21/08 takes precedence)
Definition statement
This subclass/group covers:

Portable lighting devices provided with stands or bases to be used as a movable standing lamp

References relevant to classification in this group
This subclass/group does not cover:
Supporting, suspending, or attaching arrangements for lighting devices; Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
Informative references
Attention is drawn to the following places, which may be of interest for search:
Stands for supporting apparatus or articles in general
Electrical connection of the arms of a multi-armed chandelier
Mechanical connection of the arms of a multi-armed chandelier
Synonyms and Keywords

In patent documents the following words " base", "Socles", "embase" and "piétement" are often used as synonyms

Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for fastening or securing constructional elements or machine parts together
Head fittings (for medical purposes A61B 1/06[N: hats or helmets with lamps A42B 3/044 ])
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.US3249271

References relevant to classification in this group
This subclass/group does not cover:
Hats or helmets with lamps
Informative references
Attention is drawn to the following places, which may be of interest for search:
Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes with illuminating arrangements
Supporting and suspending elements for a portable lighting device; Head fittings
[N: portable lighting devices]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Supporting and suspending elements for a portable lighting device; Clips ; Clamps
[N: portable lighting devices]
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.GB739441

e.g.US2402877

Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards (adjustable mounting F21V 21/14; construction of posts not peculiar to use with lighting devices E04H 12/00)
Definition statement
This subclass/group covers:

Access door to the inside of a pole for lighting device; compartments inside the lighting pole

References relevant to classification in this group
This subclass/group does not cover:
Construction of posts not peculiar to use with lighting devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Adjustable mounting of lighting devices
Fixing lighting devices to pendants (F21V 21/002 takes precedence)
Definition statement
This subclass/group covers:

e.g.US2008112172

Adjustment clip for a suspended light fixture

References relevant to classification in this group
This subclass/group does not cover:
Supporting, suspending, or attaching arrangements for lighting devices making direct electrical contact
Fixing lighting devices to arms or standards (F21V 21/002 takes precedence)
Definition statement
This subclass/group covers:

e.g.US2011122634

Connector for connecting lamp to support

e.g.US2010102185

T-channel fixture-mounting pole clamp

References relevant to classification in this group
This subclass/group does not cover:
Supporting, suspending, or attaching arrangements for lighting devices making direct electrical contact
Spring-loaded poles fixed at both ends
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.DE29703165U

[N: for portable lighting devices]
Definition statement
This subclass/group covers:

Portable lighting devices provided with adjustable stands or bases to be used as a movable standing lamp

e.g.US3936022

e.g.GB739441

Special rules of classification within this group

Documents with this scope, published before 1985, are classified in the higher group F21V 21/14

specially adapted for power operation, e.g. by remote control
Definition statement
This subclass/group covers:

Lighting devices comprising electrical motor to actuate an adjustment movement of the lighting devices

Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements of switches in or on lighting devices activated by remote control means
telescopic
Informative references
Attention is drawn to the following places, which may be of interest for search:
Telescopic towers; masts, poles
Undercarriages changeable in height or length of legs by telescoping
Lazy-tongs
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.DE102009010933

employing universal joints
Informative references
Attention is drawn to the following places, which may be of interest for search:
Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
Pivoted housings or frames
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electric lighting devices with self-contained electric batteries or cells characterised by the provision of a light source housing portion adjustably fixed to the remainder of the device
Supporting elements displaceable along a guiding element [N: (telescopic mounting of lighting devices F21V 21/22 )]
References relevant to classification in this group
This subclass/group does not cover:
Telescopic mountings of a lighting device
Informative references
Attention is drawn to the following places, which may be of interest for search:
Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits; Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length, e.g. track lighting systems
Hoisting or lowering devices, e.g. for maintenance (F21V 21/14 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Adjustable mountings of lighting devices
Hand grips
Informative references
Attention is drawn to the following places, which may be of interest for search:
Operation lamp handles
A61B19/00N
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Handle
handle is defined to grab and/or manipulate/move the lighting device to a chosen position and not as being a handle on which a lighting device is or can be mounted.
[N:for operation or dentist lamps]
Special rules of classification within this group

In this group, it is desirable to add the Indexing Code F21W 2131/202 or F21W 2131/205

[N:for portable lighting devices]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Supporting and suspending elements for a portable lighting device
Arrangements of electric circuit elements in or on lighting devices (electric circuits per se H05B 39/00)
References relevant to classification in this group
This subclass/group does not cover:
Electric circuits per se
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangement of electronic circuits separated from the light source for vehicle (e.g. mounting of housings for starter circuits for discharge lamps)
Arrangement of electronic circuits part of the light source or light source holder for vehicle (e.g. mounting of housings of starter circuits for discharge lamps)
the elements being switches (safety devices F21V 25/00)
Definition statement
This subclass/group covers:

Electric means varying continuously or discontinuously the light intensity, e.g. ON/OFF switch, potentiometer, dimmer,...etc

Informative references
Attention is drawn to the following places, which may be of interest for search:
Safety devices structurally associated with lighting devices
Details of kinds solely applicable to the devices covered by groups F21L 2/00 to F21L 14/00 concerned with the fitting
the elements being coupling devices, e.g. for shavers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Line connectors; Current collectors
Safety devices structurally associated with lighting devices (gas- tight or water-tight arrangements F21V 31/00; in general F16P; protective circuit arrangements per se H02H 7/00)
Definition statement
This subclass/group covers:

Electromagnetic shielding of the lighting device

Intumescent material associated with lighting device

Informative references
Attention is drawn to the following places, which may be of interest for search:
Safety devices in general
Gas-tight or water-tight arrangements
Protective circuit arrangements per se
coming into action when lighting device is disturbed, dismounted, or broken
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electric circuit per se
Cable-stowing arrangements structurally associated with lighting devices, e.g. reels (storing lengths of cable in general B65H); [N:the lighting devices being vehicle headlamps F21S 48/1109; the lighting devices being vehicle rear lights F21S 48/212]
Definition statement
This subclass/group covers:

Power cable winding device for a lighting device

e.g.DE202007002658U

References relevant to classification in this group
This subclass/group does not cover:
Cable-stowing arrangements structurally associated with lighting devices, the lighting devices being vehicle headlamps
Cable-stowing arrangements structurally associated with lighting devices, the lighting devices being vehicle rear lights
Informative references
Attention is drawn to the following places, which may be of interest for search:
Storing lengths of cable in general
Cable inlets
Definition statement
This subclass/group covers:

Illustrative example of subject matter classified in this group.

e.g.US2010155135

Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of coupling devices of the kinds covered by groups H01R 12/70 or H01R 24/00-H01R 33/00; Means for relieving strain on wire connection, e.g. cord grip
Cooling or heating arrangements (cooling of air-treatment systems with air-flow over lighting fixtures F24F 3/056; lighting fixtures combined with outlets for air-treatment systems F24F 13/078; cooling of projectors G03B 21/16) [N: cooling of lighting devices or systems specially adapted for vehicles F21S 48/32 ])
References relevant to classification in this group
This subclass/group does not cover:
Cooling of air-treatment systems with air-flow over lighting fixtures
Lighting fixtures combined with outlets for air-treatment systems
Cooling of projectors
Cooling arrangements for gas- or vapour-discharge lamps
Cooling arrangements for electric incandescent lamps
Informative references
Attention is drawn to the following places, which may be of interest for search:
Heat pipes
Cooling of vehicle headlamps or rear lamps
Heating or cooling of liquid crystal cells
G02F1/133T
Systems for controlling or regulating non-electric variables; Control of temperature
Details of data-processing equipment not covered by groups G06F 3/00 to G06F 13/00, e.g. cooling, packaging or power supply specially adapted for computer application; Constructional details or arrangements; Cooling means
Details of semiconductor or other solid state devices; Arrangements for cooling, heating, ventilating or temperature compensation
Semiconductor devices characterised by the semiconductor body packages; Heat extraction or cooling elements
Casings or enclosures with channels or ducts for flow of cooling medium
Thermal arrangements for printed circuits, e.g. for cooling or heating
[N:Cooling arrangements (F21V 29/02 takes precedence) ]
References relevant to classification in this group
This subclass/group does not cover:
Cooling by forced air
Natural cooling, i.e. by natural convection, conduction or radiation
Definition statement
This subclass/group covers:

Housing or heatsink with cooling channel or chimney

Heatsink with fins

e.g.US2009002997 - a plurality of radially extending blade members (11)

e.g.DE202009008456U

e.g.US2011050070 - see paragraph 79 - Heat pipe

e.g.US2004190285 - see ref. 110 - Heat spreader plate

e.g.US2011074265

e.g.JP2009289772

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:

In this group, the following terms are used with the meaning indicated:

Fin
Two dimensional sheet of heat conductive material, thermally linked to the heat sink, having at least partially part of the both sides submitted to air in movement in order to extract heat therefrom.
Synonyms and Keywords

In patent documents the following words " fin" "blade","cooling vane", "ridge" and "ailette" are often used as synonyms

[N:Heating arrangements (heating arrangements structurally associated with electric lamps H01J 61/52)]
References relevant to classification in this group
This subclass/group does not cover:
Heating arrangements structurally associated with electric lamps
Cooling by forcing air [N: or gas] over or around the light source (cooling arrangements structurally associated with electric [N: discharge or incandescent] lamps H01J 61/52, H01K 1/58)
References relevant to classification in this group
This subclass/group does not cover:
Heating arrangements structurally associated with electric lamps
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling, preventing overheating of projectors or projection-type viewers
G03B 21/16, G03B11/20
Gas-tight or water-tight arrangements
Definition statement
This subclass/group covers:

Sealing of lighting device housings

Informative references
Attention is drawn to the following places, which may be of interest for search:
Waterproofing of vehicle headlamps and signal lamps
Safety devices structurally associated with lighting devices
Cable-stowing arrangements structurally associated with lighting devices; cable inlets
Cooling devices
Casings, cabinets or drawers for electric apparatus; Hermetically-sealed casings
Provision of filling media (safety devices F21V 25/00; cooling arrangements F21V 29/00)
Definition statement
This subclass/group covers:

e.g.US2011085334

LED illuminating device with a transparent epoxy resin filling the shell to sealedly envelope the printed circuit board

Informative references
Attention is drawn to the following places, which may be of interest for search:
Safety devices
Cooling arrangements
Structural combinations of lighting devices with other articles, not otherwise provided for
Definition statement
This subclass/group covers:

e.g.US2006109651

Illuminated banners or flags (G09F 17/00: banners or flags)

e.g.WO9742449

Illuminated flagpoles (E04H 12/32: flagpoles)

References relevant to classification in this group
This subclass/group does not cover:

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Lights for cultivation in receptacles, forcing frames, greenhouses
Light emitting leads or collars
Aquaria
Fishing nets
Fishing baits
Rods with build-in accessories, e.g. lighting means or measuring devices
Catching insects
Baker's ovens
A21B 3/10, F21S8/00G
Gloves; Protective gloves with luminous or reflective means
Luminous or luminescent artificial flowers, fruit, leaves, or trees
Helmet with lighting devices
Footwear having light sources
Illuminated buckles
Illuminated jewellery
Sticks
Bags, purses, or the like
Toilet or cosmetic powder containers
Shaving mirrors
Adaptations for incorporating lamps to chairs
Attachments for beds; Lighting, radio, telephone or the like connected to the bedstead
Show cases or show cabinets with lighting devices
Show windows or showcases
Picture frames with illumination
Illuminated underlays for glasses or drinking vessels
Suction cleaners
Medical instruments for examining body cavities or tubes
Dental machines for boring or cutting; Machine parts specially adapted for dentistry; Illuminating devices or attachments
Curing dental plastics prostheses by light action
A61C13/15
Massage adapted for simultaneous treatment with light
Radiation therapy
Clubs
Illuminated balls
Roller skates or skate boards
Tops
Toy vehicles
Model railways
Spanners, wrenches, screwdrivers
Guiding devices for portable power. driven tools
Hair clippers or dry shavers
Accessories for razors
Photographic composing machines
Typewriters or selective printing machines
Support for notepads with light emitting devices
Writing implements
Lamps for baking lacquers used in painting or artistic drawing
Vehicle lighting or signalling
Railway vehicles
Railway light signals
Points, form signals or gates
B61J9/00
Cycles
Ships
Life-buoys, life-belts, lifejackets
Aircraft
Closures being provided with transient audible or visual signaling means, e.g. illuminating devices
Main component parts of lifts in, or associated with, buildings or other structures; cars and travelling platforms (doors, gates or other apparatus controlling access to or exit from cars; Constructional features, e.g. walls assembly, decorative panels, comfort equipment, thermal or sound insulation; Lighting systems.
Apparatus for transferring liquids
B67D5/66
Sewing machines
Road signs
Road surface markings
Tents or canopies
Locks or keys
Stove illumination
Air conditioning systems
Outlets for directing air into rooms or spaces combined with lighting fixtures
Cooling or freezing apparatus
Furnaces, kilns, ovens or retorts
Night sights
Levels
Compasses
Measuring arrangements
Weighting apparatus
Thermometers
Speedometers
Instruments for measuring
Microscopes
Magnifying glasses
Viewing or reading apparatus
Light pointers
Optical instruments
Spectacles
Liquid crystals
Electrochromic cells
Illuminating scenes for taking photographs
Cameras
Contact photographic printing
Projection photographic printing
Clocks
Time indicated by electric lamps
Time signalling by electric lamps
Visible signalling or calling systems
Actuation of fire alarms
Traffic lights
Illuminated signs
Advertising or display means on roads or walls
Aircraft advertising
Advertising on ships
- Illuminated advertising on or in specific articles
Indicating elements or instruments
Illuminated switches
Indicating lamps in circuit-breaker switches
Indicating lamps in fuse
Lighting of aerials
Coupling devices with build-in light bulbs
Pulse counter or frequency divider indicators using glow-discharge lamps
Illuminating of telephone substation equipment
Special rules of classification within this group

Document classified here has to be forwarded to the field corresponding to the article in which the lighting device is integrated

[N:Furniture (hospital beds F21V 33/0072)]
References relevant to classification in this group
This subclass/group does not cover:
Hospital beds
Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for lighting show cases or show cabinets
Arrangements of light sources in shop window
Special rules of classification within this group

In this subclass, it is desirable to add the Indexing Code F21W 2131/301

[N:Furnishing for windows and doors (sunshades F21V 33/006)]
References relevant to classification in this group
This subclass/group does not cover:
Sunshades
Household or table equipment
Definition statement
This subclass/group covers:

e.g.US6033084

Retrofittable mailbox light system (A47G 29/12, A47G 29/1212: Mail or newspaper receptacles)

[N:Paintings, pictures or photographs; Frames therefor]
References relevant to classification in this group
This subclass/group does not cover:
Picture frames with illumination
[N:Table-ware or table equipment, e.g. dishes, cutlery or trays]
Definition statement
This subclass/group covers:

Illuminated table-ware, spoons, pastry servers

e.g.US2009147503

Informative references
Attention is drawn to the following places, which may be of interest for search:
Drinking vessels or saucer used for table service with illumination means
[N:Sanitary equipment, e.g. mirrors, showers, toilet seats or paper dispensers]
Definition statement
This subclass/group covers:

Illustrative example of subject matter covered in this group.

e.g.EP2158972 - Illuminated shower heads

References relevant to classification in this group
This subclass/group does not cover:
Brushes with additional arrangements
Mirrors for household (also bathroom)
Small mirrors (hand, pocket, cosmetic or shaving mirrors)
Mirrors for medical purposes (e.g. dentistry)
A61B1/247B
Rear mirrors for vehicles
Informative references
Attention is drawn to the following places, which may be of interest for search:
Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
[N:Household appliances, e.g. washing machines or vacuum cleaners]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Refrigerators; cold rooms; ice-boxes; cooling or freezing apparatus not covered by any other subclass; lighting arrangement
Special rules of classification within this group

In this , it is desirable to add the Indexing Codes of F21W 2131/305 for illumination for refrigerators

[N:Office articles, e.g. bookmarks, desk lamps with drawers, stands for books or music scores]
Special rules of classification within this group

In this subclass, it is desirable to add the Indexing Codes of F21W 2131/3005 for reading lights attachable to books

[N:Audio equipment, e.g. music instruments, radios or speakers]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of transducers, loudspeakers or microphones
H01R1/00
[N:General building constructions or finishing work for buildings, e.g. roofs, gutters, stairs or floors; Garden equipment; Sunshades or parasols]
Definition statement
This subclass/group covers:

Stairs with illumination (E04F 11/00)

Illuminated tiles (E04F 15/00)

e.g.WO2010092509

Carpets; Stair runners; Bedside rugs; Foot mats (A47G 27/02)

e.g.US2004212997

Sunshade, patio umbrella

e.g.DE202010000087U

Illuminated handle for door, drawer

e.g.DE102007057214

Drain gutter with illumination

e.g.WO2011055488

Illuminated handrail (E04F 11/00)

e.g.US2007175599

Illuminated window blind assembly (E06B 9/386)

References relevant to classification in this group
This subclass/group does not cover:
Illuminated umbrella
Informative references
Attention is drawn to the following places, which may be of interest for search:
General building constructions; walls; roofs; floors, ceiling, insulations or other protection of buildings
Finishing work on buildings, e.g. stairs, floors
Fixed or movable closures for openings in building, fences, e.g. doors, windows, blinds, gates
Special rules of classification within this group

In this subclass, it is desirable to add the Indexing Codes of subclasses F21W 2111/08 for illuminated handrails

[N:Safety or security signalisation, e.g. smoke or burglar alarms, earthquake detectors; Self-defence devices]
Definition statement
This subclass/group covers:

Illumination associated with smoke detector (G08B 17/10)

Illumination associated with burglar alarm detector (G08B 13/00)

e.g.WO2011042020

Relationship between large subject matter areas

Sighting devices, night sights, e.g. luminescent, combined with light source, e.g. spot-light for illuminating the target, e.g. flash lights or not covered by this group and classified in F41G 1/35

[N:Leisure, hobby or sport articles, e.g. toys, games or first-aid kits; Hand tools; Toolboxes]
Definition statement
This subclass/group covers:

Illumination for barbecues

Illumination for first aid kits or toolboxes

e.g.US2004228117

Informative references
Attention is drawn to the following places, which may be of interest for search:
Apparatus for physical training, gymnastics, swimming, climbing or fencing; ball games; training equipment
Skates; skis; roller skates, design or layout or courts, rinks or the like
Toys, e.g. tops, dolls, hoops, building blocks
[N:Ventilating systems (lighting fixtures combined with outlets for air treatment systems F24F 13/078)]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lighting fixtures combined with outlets for air treatment systems
[N: Fans, e.g. ceiling fans (forced cooling for lighting devices F21V 29/02 )]
Definition statement
This subclass/group covers:

Combined light fitting and ceiling fans

e.g.WO2007006096

References relevant to classification in this group
This subclass/group does not cover:
Air forced cooling for lighting devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Ceiling fans
Candle holders
Informative references
Attention is drawn to the following places, which may be of interest for search:
Candles per se
Non-electric lighting devices or systems employing a point-like light source
Special rules of classification within this group

In this subclass, it is desirable to add the Indexing Codes of F21W 2121/002 for candle holders for birthday or anniversary cakes

[N:Special means for attaching the candle to the candle holder]
References relevant to classification in this group
This subclass/group does not cover:
Fastening of light sources or lampholders
Arrangements of mantles or other incandescent bodies on burners (attaching to lamp parts F21V 19/06)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Attaching to lamp parts
Details of lighting devices employing combustion as light source, not otherwise provided for; Night lamps; Votive lamps
Informative references
Attention is drawn to the following places, which may be of interest for search:
Burners for combustion of a gas
[N:vegetal (F21V 37/0033 takes precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Combination of mineral and vegetal
[N:mineral (F21V 37/0033 takes precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Combination of mineral and vegetal
[N:Fastening of chimneys (F21V 37/0087 takes precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Devices for lifting chimneys or cover glasses
[N:Fastening of cover glasses (F21V 37/0087 takes precedence)]
References relevant to classification in this group
This subclass/group does not cover:
Devices for lifting chimneys or cover glasses
Special adaptation for protection against draughts (for lanterns F21L 19/006); Draft controllers
Informative references
Attention is drawn to the following places, which may be of interest for search:
For lanterns
Subject matter not provided for in other groups of this subclass
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013