Manual of U.S. Patent Classification
as of June 30, 2000

Class
174
ELECTRICITY: CONDUCTORS AND INSULATORS

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> ELECTRICITY: CONDUCTORS AND INSULATORS
1		MISCELLANEOUS
2		LIGHTNING PROTECTION
3		. Rods
4R		AIR TERMINALS
4C		. Coated and radioactive
5R		ELECTRIC SHOCK HAZARD PROTECTIVE DEVICES
5SB		. Shock protection, body insulation
5SG		. Shock protection, grounding devices
6		EARTH GROUNDS
7		. Driving type
8		WITH FLUIDS OR VACUUM
9R		. Current conductive fluid and/or vacuum
9F		. . Conductive fluid
10		. With cable or conduit preinstallation devices
11R		. With fluid-condition responsive and/or indicating means
11BH		. . Bushings
12R		. With expansion and contraction means
13		. . Built into conduit or cable
12BH		. . Expansion bushings
14R		. With fluid maintenance or conditioning means
14BH		. . Bushings
15.1		. With cooling or fluid feeding, circulating or distributing
15.2		. . By heat pipe
15.3		. . For bushing or pothead
15.4		. . Superconductive type
15.5		. . . For cable, conductor or joint
15.6		. . For cable, conductor or joint
15.7		. . For welding or furnace cable
16.1		. . By ventilation or gas circulation
16.2		. . . Of bus bars or bus ducts
16.3		. . . With heat sink
17R		. Boxes and housings
17.05		. . Hermetic sealed envelope type (e.g., with exhaust stem)
17.06		. . . Liquid seal
17.07		. . . Combined lead-in and exhaust tube
17.08		. . . With electric connector
18		. . With bushing, terminal or lead-in
17LF		. . Liquid filled
17GF		. . Gas filled
17SF		. . Solid filled
17VA		. . Venting, absorption, expansion
17CT		. . Closures, terminals, gaskets
19		. Conduit or cable end structure
20		. . With fluid stops
21R		. Conduit or cable joints
22R		. . With fluid stops
22C		. . . Concentric
21JS		. . Joints: separable
21JR		. . Joints: rotatable
21JC		. . Joints: rotatable, coaxial
21C		. . Joints: coaxial
21CA		. . Joints: coaxial angle expansion
23R		. With fluid stops
23C		. . Compositions
24		. Conduits, cables and conductors
25R		. . Impregnated insulation type
26R		. . . Multiple conductor
26G		. . . . Gas filled
25C		. . . Impregnating compositions
25G		. . . Gas filled
25P		. . . Processes
27		. . Parallel or twisted conductors
28		. . Coaxial or concentric type
29		. . . With spiral spacer
30		. Insulators
31R		. . Axial passage and/or through wall or plate
31.5		. . . Liquid sealed joint
31S		. . . Spark plugs
32		ANTI-INDUCTIVE STRUCTURES
33		. Conductor transposition
34		. . Conduit or cable structure
35R		. Shielded or screened
36		. . Conductor only
35C		. . Connectors and joints
35SM		. . Spark plugs, manifolds
35GC		. . Gaskets, covers
35CE		. . Coils, anti-eddy-current
35MS		. . Materials, stock and screen rooms
35TS		. . Radio tube shields
37		UNDERGROUND
38		. Distributing and/or combined with overhead
39		. Street, sidewalk, gutter or curb structure
40R		OVERHEAD
41		. With messenger cable
42		. With conductor vibration damping means
43		. Distributing and/or plural point support
44		. With connector or wire fanning arrangements
45R		. Towers, poles or posts
45TD		. . Tension devices
40CC		. Ground clamps and cable clips
40TD		. Tension devices
46		HANDLES
47		COMBINED FLUID CONDUIT AND ELECTRICAL CONDUCTOR
48		WALL MOUNTED CONDUITS AND/OR HOUSINGS
49		. Plural outlet and/or conduit
50		BOXES AND HOUSINGS
50.5		. Hermetic sealed envelope type
50.51		. . With covering or casing for envelope
50.52		. . With electrical connector
50.53		. . . Envelope portion forms connector
50.54		. . With mounting means for a device within envelope
50.55		. . Hollow lead surrounding another lead (e.g., concentric type)
50.56		. . Lead-in insulated from metal wall
50.57		. . Stem or sealing disk attached to envelope neck
50.58		. . . By fused-type seal
50.59		. . With shield for lead-in seal or between the lead-in conductors
50.6		. . Plural lead-in
50.61		. . With bonded seal for conductive member (e.g., glass to metal)
50.62		. . . With cement or plastic
50.63		. . . Metal disk or ring-type seal
50.64		. . . Foil or flat lead-in
51		. With grounding means
52.1		. With electric device or mounting means therefor
52.2		. . Potted or encapsulated
52.3		. . Sealed
52.4		. . . Flat housing for electronic device (e.g., flat pack, dual-in-line package)
52.5		. . . Header, mounting stud, or can-type housing for semiconductor or crystal
52.6		. . . Pellet type housing
53		. . Plug receptacle or wall switch type
54		. . . With fixture coupling or mounting means
55		. . . Unitary with face plate
56		. . . . External
57		. . . Adjustable
58		. . . With box or housing mounting means
59		. . With connectors
60		. . . Cable or conduit terminal casings
61		. . Fixtures coupling or mounting means
62		. . . Stud or nipple
63		. . . . With box supporting means
64		. . . . With conduit or cable coupling means
65R		. With conduit or cable opening, coupling means or hole closures
65SS		. . Sealed stuffing-gland type
65G		. . Grommet type
66		COVERS OR FACE PLATES
67		. With closure for face plate opening
68.1		CONDUITS, CABLES OR CONDUCTORS
68.2		. Bus bars or bus ducts (Residual)
68.3		. Single duct conduits
250		. Preformed panel circuit arrangement (e.g., printed circuit)
251		. . With encapsulated wire
252		. . With cooling means
253		. . Micropanel
254		. . Convertible shape (e.g., flexible) or circuit (e.g., breadboard)
255		. . With particular substrate or support structure
256		. . With particular material
257		. . . Conducting (e.g., ink)
258		. . . Insulating
259		. . . Adhesive/bonding
260		. . With electrical device
261		. . With particular conductive connection (e.g., crossover)
262		. . . Feedthrough
263		. . . . With solder
264		. . . . Voidless (e.g., solid)
265		. . . . . Preform in hole
266		. . . . Hollow (e.g., plated cylindrical hole)
267		. . . Termination post
268		. . With single conductive plane (e.g., tape, cable)
69		. Extensible
70R		. Combined
71R		. . Branched
72R		. . . Multi-duct conduit and/or plural branch
72A		. . . . Wire harness
72B		. . . . Bus bars
72C		. . . . Casing, moldings
72TR		. . . . Ribbon type
71B		. . . Bus bars
71C		. . . Coaxial
73.1		. . With joint or end structure conductive stress distributing means
74R		. . With end structure
75R		. . . With joint
75B		. . . . Bootleg
75D		. . . . With detachable joint (e.g., potheads)
75F		. . . . Flexible spring type
75C		. . . . Coaxial
76		. . . Plastic filled
77R		. . . Sealing
77S		. . . . Spark plugs
78		. . . With grounding means
79		. . . With supporting means
80		. . . With insulator skirts
81		. . . Elbow or hood outlet type
82		. . . End cap outlet type
83		. . . Lining thimble
74A		. . . Insulating cap or sleeve
84R		. . With joints
85		. . . Axially insulated joint sleeve sections
86		. . . Angularly movable or adjustable
87		. . . Angular
88R		. . . Plural conductor and/or duct
88B		. . . . Bus bars
88C		. . . . Coaxial
88S		. . . . Separable
89		. . . Radially spread or flanged sheath or conduit
90		. . . Stranded conductor
91		. . . Divided joint sleeves
92		. . . . Longitudinally
93		. . . Sleeve and end cap-type casing
94R		. . . Bare-conductor
94S		. . . . Separable
84C		. . . Crimped
84S		. . . Separable
70S		. . Submarine repeater housings
70B		. . Bus bars
70C		. . Conduits or strips
70A		. . Aerial cable
95		. Plural duct
96		. . Embedded conduit-ducts or conductors
97		. . Grooves or channels
98		. With embedded conduit-duct or conductor
99R		. With interior conductor or cable supports
100		. . Vertical conductor or cable
99B		. . Bus bars
99E		. . Expansion
101		. Removable wall
101.5		. Buoyant
102R		. Conductive armor or sheath
103		. . Plural individually sheathed or armored conductors
104		. . . Embedded in shield
105R		. . Plural, insulated
105SC		. . . Semiconducting
105B		. . . Segmental
106R		. . Plural, conductively contacting or composite
106SC		. . . Semiconducting
106D		. . . Corrugated
107		. . Protected by nonconductive layer
108		. . Spirally applied
109		. . . Overlapping or interlocking
102A		. . Alloys
102SC		. . Semiconducting
102C		. . Sheath coated
102SP		. . Strip, type, perforated, slotted
102P		. . Powdered insulation
102D		. . Corrugated
102E		. . Rope
110R		. Insulated
111		. . With beads or disc
112		. . With identifying means
113R		. . Multiple conductor
114R		. . . Split conductor
114S		. . . . Segmental reentrant
115		. . . Dissimilar or auxiliary conducting elements
116		. . . With filler insulation
117R		. . . Assemblies of noncircular section
117F		. . . . Flat or ribbon type
117FF		. . . . Conductor itself is flat
117M		. . . . Mesh
117AS		. . . . Air-spaced
117A		. . . . Adhesive
113A		. . . Radially compressed
113AS		. . . Air-spaced
113C		. . . Insulating core
118		. . With powdered or granular material
119R		. . Composite or noncircular strand section
119C		. . . Coated, compositions
120R		. . Plural or impregnated layers
121R		. . . Fibrous or fabric with plastic or coating materials
121A		. . . . Flame, weather or mold proof
121B		. . . . Cellulose
121AR		. . . . Rubber
121SR		. . . . Synthetic resin
122R		. . . Fibrous or fabric
122G		. . . . Glass
122C		. . . . Coated
120C		. . . Coated or impregnated
120FP		. . . Fluid-type cable paper
120SC		. . . Semiconducting
120AR		. . . Rubber
120SR		. . . Synthetic resin
124R		. . Fibrous or fabric
124G		. . . Mineral-glass
124GC		. . . Mineral-glass, coated
110A		. . Oxide
110P		. . Cellulose
110AR		. . Rubber
110SR		. . Synthetic resin
110SY		. . Styrene
110B		. . Isobutylent
110N		. . Polyamide (Nylon)
110PM		. . Polyethylene (including "Mylar")
110D		. . Dacron
110V		. . Vinyl
110FC		. . Fluorocarbons (teflon, Kel-f, FEP-Teflon)
110S		. . Silicones
110F		. . Foam
110E		. . Epoxy
125.1		. Superconductors
126.1		. Conductor structure (nonsuperconductive)
126.2		. . Composite
126.3		. . Corrugated or slotted
126.4		. . Metal coated on insulation
127		. . Corona prevention
128.1		. . Plural strand
128.2		. . . Bundle conductors
129R		. . . Assemblies of noncircular section
129B		. . . . Bus bars
129S		. . . . Segmental, reentrant
130		. . . Annular
131R		. . . . With wall support
131A		. . . . . Insulating core
131B		. . . . . Synthetic, coated
133R		. . Noncircular strand section
133B		. . . Bus bars
135		. Accessories
136		. . Anti-abrasion devices
137R		INSULATORS
138R		. Special application
138A		. . Antennas
138C		. . Compositions
138S		. . Spark plugs
138B		. . Pull chains
138D		. . Studs, rods, and joints
138E		. . Slot liners and spacers
138F		. . Terminal covers
138G		. . Component mounting pads, spacers and holders
138H		. . Neon tube type
138J		. . Resistor or heater type
139		. Combined
140R		. . With conductive arcing or stress distributing means
141R		. . . Strings or stacks
141C		. . . . Coated
142		. . . Bushing type
143		. . . . Condenser type
144		. . . Arcing or grading devices
140C		. . . Coated
140H		. . . Hood type
140S		. . . Strain type
140CR		. . . Corona ring
145		. . With connector
146		. Mid-line spacers
147		. . Cross-over
148		. Multiple insulator assemblies
149R		. . Multiple conductor
149B		. . . Bus bars
150		. . Strings and stacks
151		. Through wall or plate
152R		. . Bushing type
153R		. . . Opposed wall engaging means
153A		. . . . Antennas
153G		. . . . Grommets
152A		. . . Antennas
152E		. . . Electric space discharge device
152S		. . . Spark plugs
152G		. . . Grommets or tubes
152GM		. . . Glass-to-metal seal
154		. Insulator and conductor embracing holder
155		. . Divided insulator
156		. Divided insulator
157		. . Aligned through aperture
158R		. With insulator-supporting or attaching means
159		. . Insulated nail or staple type
160		. . Strand engaging suspension means
161R		. . Adjustably or movably mounted
161F		. . . Fence post insulators
162		. . Double arm
163R		. . Support and/or insulator embracing or clamping
163F		. . . Fence post insulators
164		. . Support penetrating
165		. . . Penetrating element socketed in insulator
166R		. . . Through aperture, penetrating element clamped
166S		. . . . Stand-off insulators
158F		. . Fence post insulators
167		. With conductor receiving aperture or bushing type
168		. With conductor holding means
169		. . Fitting or terminal type
170		. . . Hooks
171		. . . Special conductor form
172		. . Insulator embracing
173		. . . Tie wires
174		. . Insulator structure
175		. . . Self-retaining
176		. With terminal elements
177		. . Plural
178		. . . Multi-part, sectional or composite insulator
179		. . . . Protected rod type
180		. . . . Pin and opposed overlapping terminal
181		. . . With insulated reinforcing or interlocking element
182		. . . Cap and pin
183		. . . Overlapping
184		. . . . Interlinking
185		. . . . Pin and opposed terminal
186		. . . Caps
187		. . Ventilating
188		. . Cap type
189		. . . Plastic material adhered
190		. . . Divided cap
191		. . . Clamps or clasps
192		. . . Rings or wedges
193		. . . Screw or bayonet
194		. . Pin type
195		. . . Multi-part insulators
196		. . . Plastic material adhered
197		. . . Clamps or clasps
198		. . . Rings or wedges
199		. . . Expanded
200		. . . With thimble in socket
201		. . . Through pin
202		. . . Screw or bayonet type
203		. . . . Strand thread
204		. . . . Sheet material thread
205		. . . . Soft yielding material pin
206		. . . . Sockets
207		. . Link or clevis
208		. Link type
209		. Sectional, multi-part, composite, or coated
210		. . Pin socket type
211		. With moisture or dirt removing or shedding
212		. Surface configuration
137A		. Coated
137B		. Compositions
		******************************
		DIGESTS
		******************************
DIG 1		Anti-tracking
DIG 2		Ballasts
DIG 7		Sodium conductors, connectors, etc.
DIG 8		Shrinkable tubes, etc.
DIG 9		Pull-out cabinet or drawer with retractable cable
DIG 10		Bushings with current transformers
DIG 11		Zipper tubes
DIG 12		Helical preforms
DIG 13		HIGH VOLTAGE CABLE (E.G., ABOVE 10KV, CORONA PREVENTION, ETC.)
DIG 14		. Having a particular cable application (e.g., winding, etc.)
DIG 15		. . In a power generation system (e.g., prime-mover dynamo, generator system, etc.)
DIG 16		. . In a motive power system (e.g., electric motor control system, etc.)
DIG 17		. . In an electric power conversion, regulation, or protection system
DIG 18		. . In a power distribution network
DIG 19		. . In a dynamo-electric machine
DIG 20		. . . Stator
DIG 21		. . . Rotor
DIG 22		. . . Winding, per se
DIG 23		. . In a circuit breaker, relay, or switch
DIG 24		. . In an inductive device (e.g., reactor, electromagnet, etc.)
DIG 25		. . . Transformer
DIG 26		. Having a plural-layer insulation system
DIG 27		. . Including a semiconductive layer
DIG 28		. . . Plural semiconductive layers
DIG 29		. Having a semiconductive layer
DIG 30		. Having insulation with a particular dimension or geometry
DIG 31		. Having a shield or metallic layer
DIG 32		. Having means for cooling
DIG 33		. Method of cable manufacture, assembly, repair, or splicing

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Last Modified: 6 October 2000