1. CPC Sections
  2. CPC Section H
  3. CPC Class H01
  4. CPC Subclass H01C
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
H01C
RESISTORS [2018-08]
NOTES

  • In this subclass, the term "adjustable" means mechanically adjustable.
  • Variable resistors, the value of which is changed non-mechanically, e.g. by voltage or temperature, are classified in group H01C 7/00.
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
H01C 1/00
Details [2013-01]
H01C 1/01
.
Mounting; Supporting [2013-01]
H01C 1/012
. .
the base extending along and imparting rigidity or reinforcement to the resistive element (H01C 1/016 takes precedence; the resistive element being formed in two or more coils or loops as a spiral, helical or toroidal winding H01C 3/18, H01C 3/20; the resistive element being formed as one or more layers or coatings on a base H01C 7/00) [2013-01]
H01C 1/014
. .
the resistor being suspended between and being supported by two supporting sections (H01C 1/016 takes precedence) [2013-01]
H01C 1/016
. .
with compensation for resistor expansion or contraction [2013-01]
H01C 1/02
.
Housing; Enclosing; Embedding; Filling the housing or enclosure [2013-01]
H01C 1/022
. .
the housing or enclosure being openable or separable from the resistive element [2013-01]
H01C 1/024
. .
the housing or enclosure being hermetically sealed (H01C 1/028, H01C 1/032, H01C 1/034 take precedence) [2013-01]
H01C 1/026
. . .
with gaseous or vacuum spacing between the resistive element and the housing or casing [2013-01]
H01C 1/028
. .
the resistive element being embedded in insulation with outer enclosing sheath [2013-01]
H01C 1/03
. . .
with powdered insulation [2013-01]
H01C 1/032
. .
plural layers surrounding the resistive element (H01C 1/028 takes precedence) [2013-01]
H01C 1/034
. .
the housing or enclosure being formed as coating or mould without outer sheath (H01C 1/032 takes precedence) [2017-08]
H01C 1/036
. . .
on wound resistive element [2013-01]
H01C 1/04
.
Arrangements of distinguishing marks, e.g. colour coding [2013-01]
H01C 1/06
.
Electrostatic or electromagnetic shielding arrangements [2013-01]
H01C 1/08
.
Cooling, heating or ventilating arrangements [2013-01]
H01C 1/082
. .
using forced fluid flow [2013-01]
H01C 1/084
. .
using self-cooling, e.g. fins, heat sinks [2013-01]
H01C 1/12
.
Arrangements of current collectors [2013-01]
H01C 1/125
. .
of fluid contacts [2013-01]
H01C 1/14
.
Terminals or tapping points {or electrodes} specially adapted for resistors (in general H01R); Arrangements of terminals or tapping points {or electrodes} on resistors [2013-01]
H01C 1/1406
. .
{Terminals or electrodes formed on resistive elements having positive temperature coefficient} [2013-01]
H01C 1/1413
. .
{Terminals or electrodes formed on resistive elements having negative temperature coefficient} [2013-01]
H01C 1/142
. .
the terminals or tapping points being coated on the resistive element [2013-01]
H01C 1/144
. .
the terminals or tapping points being welded or soldered [2013-01]
H01C 1/146
. .
the resistive element surrounding the terminal [2013-01]
H01C 1/148
. .
the terminals embracing or surrounding the resistive element (H01C 1/142 takes precedence) [2013-01]
H01C 1/16
.
Resistor networks not otherwise provided for [2013-01]
H01C 3/00
Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids [2013-01]
H01C 3/005
.
{Metallic glasses therefor} [2013-01]
H01C 3/02
.
arranged or constructed for reducing self-induction, capacitance or variation with frequency [2013-01]
H01C 3/04
.
Iron-filament ballast resistors; Other resistors having variable temperature coefficient [2013-01]
H01C 3/06
.
Flexible or folding resistors, whereby such a resistor can be looped or collapsed upon itself [2013-01]
H01C 3/08
.
Dimension or characteristic of resistive element changing gradually or in discrete steps from one terminal to another [2013-01]
H01C 3/10
.
the resistive element having zig-zag or sinusoidal configuration [2013-01]
H01C 3/12
. .
lying in one plane [2017-08]
H01C 3/14
.
the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding (H01C 3/02 - H01C 3/12 take precedence) [2016-05]
H01C 3/16
. .
including two or more distinct wound elements or two or more winding patterns [2013-01]
H01C 3/18
. .
wound on a flat or ribbon base (H01C 3/16 takes precedence) [2013-01]
H01C 3/20
. .
wound on cylindrical or prismatic base (H01C 3/16 takes precedence) [2013-01]
H01C 7/00
Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material (consisting of loose powdered or granular material H01C 8/00; resistors having potential barriers, e.g. field-effect resistors, H01L 29/00; semiconductor devices sensitive to electromagnetic or corpuscular radiation, e.g. photoresistors, H01L 31/00; magnetic field controlled resistors H10N 50/10; bulk negative resistance effect devices H10N 80/00) [2024-01]
H01C 7/001
.
{Mass resistors} [2013-01]
H01C 7/003
.
{Thick film resistors} [2013-01]
H01C 7/005
. .
{Polymer thick films} [2013-01]
H01C 7/006
.
{Thin film resistors} [2013-01]
H01C 7/008
.
{Thermistors (H01C 7/02 - H01C 7/06 take precedence)} [2016-05]
H01C 7/02
.
having positive temperature coefficient {(ceramics C04B)} [2013-01]
H01C 7/021
. .
{formed as one or more layers or coatings} [2013-01]
H01C 7/022
. .
{mainly consisting of non-metallic substances (H01C 7/021 takes precedence)} [2013-01]
H01C 7/023
. . .
{containing oxides or oxidic compounds, e.g. ferrites} [2013-01]
H01C 7/025
. . . .
{Perovskites, e.g. titanates} [2020-01]
H01C 7/026
. . . .
{Vanadium oxides or oxidic compounds, e.g. VOx} [2013-01]
H01C 7/027
. .
{consisting of conducting or semi-conducting material dispersed in a non-conductive organic material} [2013-01]
H01C 7/028
. .
{consisting of organic substances} [2013-01]
​
H01C 7/04
.
having negative temperature coefficient {(thermometers using resistive elements G01K 7/16)} [2021-01]
NOTE

  • {In groups H01C 7/043 - H01C 7/049, the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, classification is made in the last appropriate place.}
H01C 7/041
. .
{formed as one or more layers or coatings} [2013-01]
H01C 7/042
. .
{mainly consisting of inorganic non-metallic substances (H01C 7/041 takes precedence)} [2021-01]
H01C 7/043
. . .
{Oxides or oxidic compounds} [2013-01]
H01C 7/044
. . . .
{Zinc or cadmium oxide} [2013-01]
H01C 7/045
. . . .
{Perovskites, e.g. titanates} [2020-01]
H01C 7/046
. . . .
{Iron oxides or ferrites} [2013-01]
H01C 7/047
. . . .
{Vanadium oxides or oxidic compounds, e.g. VOx} [2013-01]
H01C 7/048
. . .
{Carbon or carbides} [2013-01]
H01C 7/049
. .
{mainly consisting of organic or organo-metal substances (H01C 7/041 takes precedence)} [2013-01]
H01C 7/06
.
including means to minimise changes in resistance with changes in temperature [2013-01]
H01C 7/10
.
voltage responsive, i.e. varistors [2013-01]
H01C 7/1006
. .
{Thick film varistors} [2013-01]
H01C 7/1013
. .
{Thin film varistors} [2013-01]
H01C 7/102
. .
Varistor boundary, e.g. surface layers (H01C 7/12 takes precedence) [2013-01]
H01C 7/105
. .
Varistor cores (H01C 7/12 takes precedence) [2013-01]
H01C 7/108
. . .
Metal oxide [2013-01]
H01C 7/112
. . . .
ZnO type [2013-01]
H01C 7/115
. . . .
Titanium dioxide- or titanate type [2013-01]
H01C 7/118
. . .
Carbide, e.g. SiC type [2013-01]
H01C 7/12
. .
Overvoltage protection resistors {(series resistors structurally associated with spark gaps H01T 1/16)} [2013-01]
H01C 7/123
. . .
{Arrangements for improving potential distribution} [2013-01]
H01C 7/126
. . .
{Means for protecting against excessive pressure or for disconnecting in case of failure} [2013-01]
​
H01C 7/13
.
current responsive [2016-05]
NOTE

H01C 7/18
.
comprising a plurality of layers stacked between terminals [2013-01]
H01C 7/20
.
the resistive layer or coating being tapered [2013-01]
H01C 7/22
.
Elongated resistive element being bent or curved, e.g. sinusoidal, helical [2013-01]
H01C 8/00
Non-adjustable resistors consisting of loose powdered or granular conducting, or powdered or granular semi-conducting material [2013-01]
H01C 8/02
.
Coherers or like imperfect resistors for detecting electromagnetic waves [2013-01]
H01C 8/04
.
Overvoltage protection resistors; Arresters [2013-01]
H01C 10/00
Adjustable resistors [2013-01]
H01C 10/005
.
{Surface mountable, e.g. chip trimmer potentiometer} [2013-01]
H01C 10/02
.
Liquid resistors [2013-01]
H01C 10/025
. .
{Electrochemical variable resistors (trimming resistors by electrolytic treatment H01C 17/2412, H01C 17/262)} [2013-01]
H01C 10/04
.
with specified mathematical relationship between movement of resistor actuating means and value of resistance, other than direct proportional relationship [2013-01]
H01C 10/06
.
adjustable by short-circuiting different amounts of the resistive element [2013-01]
H01C 10/08
. .
with intervening conducting structure between the resistive element and the short-circuiting means, e.g. taps [2013-01]
H01C 10/10
.
adjustable by mechanical pressure or force [2017-08]
H01C 10/103
. .
{by using means responding to magnetic or electric fields, e.g. by addition of magnetisable or piezoelectric particles to the resistive material, or by an electromagnetic actuator} [2013-01]
H01C 10/106
. .
{on resistive material dispersed in an elastic material (H01C 10/103 and H01C 10/12 take precedence; for electric switches H01H 1/029)} [2013-01]
H01C 10/12
. .
by changing surface pressure between resistive masses or resistive and conductive masses, e.g. pile type [2013-01]
H01C 10/14
.
adjustable by auxiliary driving means [2013-01]
H01C 10/16
.
including plural resistive elements [2013-01]
H01C 10/18
. .
including coarse and fine resistive elements [2013-01]
H01C 10/20
. .
Contact structure or movable resistive elements being ganged [2013-01]
H01C 10/22
.
resistive element dimensions changing gradually in one direction, e.g. tapered resistive element (H01C 10/04 takes precedence) [2013-01]
H01C 10/23
.
resistive element dimensions changing in a series of discrete, progressive steps [2013-01]
H01C 10/24
.
the contact moving along turns of a helical resistive element, or vica versa [2013-01]
​
H01C 10/26
.
resistive element moving (H01C 10/16, H01C 10/24 take precedence) [2016-05]
NOTE

H01C 10/28
.
the contact rocking or rolling along resistive element or taps [2013-01]
H01C 10/30
.
the contact sliding along resistive element [2013-01]
H01C 10/301
. .
{consisting of a wire wound resistor} [2013-01]
H01C 10/303
. . .
{the resistor being coated, e.g. lubricated, conductive plastic coated, i.e. hybrid potentiometer} [2013-01]
H01C 10/305
. .
{consisting of a thick film} [2013-01]
H01C 10/306
. . .
{Polymer thick film, i.e. PTF} [2013-01]
H01C 10/308
. .
{consisting of a thin film} [2013-01]
H01C 10/32
. .
the contact moving in an arcuate path [2013-01]
H01C 10/34
. . .
the contact or the associated conducting structure riding on collector formed as a ring or portion thereof [2013-01]
H01C 10/345
. . . .
{the collector and resistive track being situated in 2 parallel planes} [2013-01]
H01C 10/36
. . .
structurally combined with switching arrangements [2013-01]
H01C 10/363
. . . .
{by axial movement of the spindle, e.g. pull-push switch (H01C 10/366 takes precedence)} [2013-01]
H01C 10/366
. . . .
{using an electromagnetic actuator} [2013-01]
H01C 10/38
. .
the contact moving along a straight path [2013-01]
H01C 10/40
. . .
screw operated [2013-01]
H01C 10/42
. . . .
the contact bridging and sliding along resistive element and parallel conducting bar or collector [2013-01]
H01C 10/44
. . .
the contact bridging and sliding along resistive element and parallel conducting bar or collector (H01C 10/42 takes precedence) [2013-01]
H01C 10/46
.
Arrangements of fixed resistors with intervening connectors, e.g. taps (H01C 10/28, H01C 10/30 take precedence) [2013-01]
H01C 10/48
. .
including contact movable in an arcuate path [2013-01]
H01C 10/50
.
structurally combined with switching arrangements (H01C 10/36 takes precedence) [2013-01]
H01C 11/00
Non-adjustable liquid resistors [2013-01]
H01C 13/00
Resistors not provided for elsewhere [2013-01]
H01C 13/02
.
Structural combinations of resistors (impedance networks per se H03H) [2013-01]
H01C 17/00
Apparatus or processes specially adapted for manufacturing resistors (providing fillings for housings or enclosures H01C 1/02; reducing insulation surrounding a resistor to powder H01C 1/03; manufacture of thermally variable resistors H01C 7/02, H01C 7/04) [2013-01]
H01C 17/003
.
{using lithography, e.g. photolithography (lithographic compositions and processing in general G03F)} [2013-01]
H01C 17/006
.
{adapted for manufacturing resistor chips} [2013-01]
H01C 17/02
.
adapted for manufacturing resistors with envelope or housing [2013-01]
H01C 17/04
.
adapted for winding the resistive element [2013-01]
H01C 17/06
.
adapted for coating resistive material on a base [2013-01]
H01C 17/065
. .
by thick film techniques, e.g. serigraphy [2013-01]
H01C 17/06506
. . .
{Precursor compositions therefor, e.g. pastes, inks, glass frits} [2013-01]
H01C 17/06513
. . . .
{characterised by the resistive component} [2013-01]
H01C 17/0652
. . . . .
{containing carbon or carbides} [2013-01]
H01C 17/06526
. . . . .
{composed of metals} [2013-01]
H01C 17/06533
. . . . .
{composed of oxides} [2013-01]
H01C 17/0654
. . . . . .
{Oxides of the platinum group} [2013-01]
H01C 17/06546
. . . . . .
{Oxides of zinc or cadmium} [2013-01]
H01C 17/06553
. . . . .
{composed of a combination of metals and oxides} [2013-01]
H01C 17/0656
. . . . .
{composed of silicides (H01C 17/0652 takes precedence)} [2013-01]
H01C 17/06566
. . . . .
{composed of borides (H01C 17/0652 takes precedence)} [2013-01]
H01C 17/06573
. . . .
{characterised by the permanent binder} [2013-01]
H01C 17/0658
. . . . .
{composed of inorganic material} [2013-01]
H01C 17/06586
. . . . .
{composed of organic material} [2013-01]
H01C 17/06593
. . . .
{characterised by the temporary binder} [2013-01]
H01C 17/07
. .
by resistor foil bonding, e.g. cladding [2013-01]
H01C 17/075
. .
by thin film techniques {(H01C 17/20 takes precedence)} [2013-01]
H01C 17/08
. . .
by vapour deposition [2013-01]
H01C 17/10
. . .
by flame spraying [2013-01]
H01C 17/12
. . .
by sputtering [2013-01]
H01C 17/14
. . .
by chemical deposition [2013-01]
H01C 17/16
. . . .
using electric current [2013-01]
H01C 17/18
. . . .
without using electric current [2013-01]
H01C 17/20
. .
by pyrolytic processes [2013-01]
H01C 17/22
.
adapted for trimming [2013-01]
H01C 17/23
. .
by opening or closing resistor geometric tracks of predetermined resistive values, {e.g. snapistors} [2013-01]
H01C 17/232
. .
Adjusting the temperature coefficient; Adjusting value of resistance by adjusting temperature coefficient of resistance [2013-01]
H01C 17/235
. .
Initial adjustment of potentiometer parts for calibration [2013-01]
H01C 17/24
. .
by removing or adding resistive material (H01C 17/23, H01C 17/232, H01C 17/235 take precedence) [2013-01]
H01C 17/2404
. . .
{by charged particle impact, e.g. by electron or ion beam milling, sputtering, plasma etching} [2016-08]
H01C 17/2408
. . .
{by pulsed voltage erosion, e.g. spark erosion} [2013-01]
H01C 17/2412
. . .
{by electrolytic treatment, e.g. electroplating (for anodic oxydation H01C 17/262)} [2016-08]
H01C 17/2416
. . .
{by chemical etching} [2013-01]
H01C 17/242
. . .
by laser {(trimming by laser in general B23K 26/351)} [2015-10]
H01C 17/245
. . .
by mechanical means, e.g. sand blasting, cutting, ultrasonic treatment [2013-01]
H01C 17/26
. .
by converting resistive material [2013-01]
H01C 17/262
. . .
{by electrolytic treatment, e.g. anodic oxydation} [2013-01]
H01C 17/265
. . .
{by chemical or thermal treatment, e.g. oxydation, reduction, annealing (etching H01C 17/2416)} [2013-01]
H01C 17/267
. . . .
{by passage of voltage pulses or electric current} [2013-01]
H01C 17/28
.
adapted for applying terminals [2013-01]
H01C 17/281
. .
{by thick film techniques} [2013-01]
H01C 17/283
. . .
{Precursor compositions therefor, e.g. pastes, inks, glass frits} [2013-01]
H01C 17/285
. . . .
{applied to zinc or cadmium oxide resistors} [2013-01]
H01C 17/286
. . . .
{applied to TiO2 or titanate resistors} [2013-01]
H01C 17/288
. .
{by thin film techniques} [2013-01]
H01C 17/30
.
adapted for baking [2013-01]