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

Class
D13
EQUIPMENT FOR PRODUCTION, DISTRIBUTION, OR TRANSFORMATION OF ENERGY

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		===> EQUIPMENT FOR PRODUCTION, DISTRIBUTION, OR TRANSFORMATION OF ENERGY
		EXCLUDED FROM THIS CLASS ARE:
		Apparatus for the measurement of electric current; see D10-75+.
		Battery tester; see D10-77.
		Blasting equipment; see D22-112.
		Cable support; see D8-354+.
		Computer operator control or interface; see D14-388+.
		Computer mouse; see D14-402+.
		Computer joystick; see D14-412+.
		Console for video game, see D21-332.
		Control panel for toy vehicle; see D21-566.
		Cover plate for receptacle or junction box; see D8-350+.
		Electric heating element; see D23-417.
		Electric welding apparatus; see D15-144.
		Electrically driven apparatus, such as electric watches; see D10-30+.
		Electrician's tools; see D8.
		Escutcheon plate, rose, outlet cover for wall switch or outlet; see D8-350+.
		Heating or cooking equipment; see D23 and D7.
		Housing for measuring or testing instruments; see D10-46+.
		Impedance matching transformer; see D14-230.
		Internal combustion engine or steam engine; see D15-1+.
		Lamp guard or protector; see D26-119.
		Light emitting gas discharge matrix display unit; see D18-26.
		Lightning arrestor; see D10-105.
		Machines and appliances; see D15, D7, D8.
		Measuring or testing instrument; see D10.
		Motor unit for garage door opener; see D15-199.
		Post combined with lamp or light; see D26-68+.
		Post or transmission tower; see D25-126+.
		Radar; see D10-70.
		Remote control unit for audio or video component; see D14-218.
		Solar collector type cooking oven; see D7-324.
		Standoff support for line insulator; see D8-364.
		Streetcar or electric railway vehicle; see D12-36+.
		Supporting or mounting bracket for conduit; see D8-354+.
		Switch knob; see D8-307+.
		Telephone connector; see D14-256.
		Telephone switching component; see D14-241. Timer; see D10-40.
		Toy remote control transformer; see D21-566.
100		SOLID FUEL (2)
101		ENERGY CONVERSION OR TRANSFORMATION (3)
102		. Solar unit or component thereof
103		. Battery or casing therefor (4)
104		. . Plural cell automotive type
105		. . . Simulative (5)
106		. . . Pass-through hand or finger grip
107		. Battery charger
108		. . Cordless appliance type
109		. . With provision for mobility (e.g., wheeled, etc.)
110		. Transformer, rectifier or casing therefor (6)
111		. . Electric fence energizer
112		. Generator, motor or casing therefor
113		. . Engine starter type
114		. . Dynamoelectric machine (e.g., generator, etc.)
115		. . . Wind or hand powered
116		. . . With handle, bar or loop for lifting
117		. Inductor (e.g., coil, etc.)
118		. Element or attachment
119		. . Battery
120		. . . Connector (e.g., terminal, clamp, etc.) (7)
121		. . . Electrode (i.e., grid or plate type)
122		. . Generator, motor or casing therefor
123		DISTRIBUTION, MODIFICATION OR CONTROL (8)
124		. Voltage regulator
125		. Condenser, resistor or potentiometer (9)
126		. Vehicle ignition component (10)
127		. . Spark or glow plug
128		. Railway component
129		. Insulator (11)
130		. . Three or more repeats, or uniform configuration, about axis (12)
131		. . Symmetrical on two axes (13)
132		. . Bilaterally symmetrical (13)
133		. Connector, conductor or housing therefor (14)
134		. . Lamp socket
135		. . . Converter (e.g., incandescent to fluorescent, etc.)
136		. . . Provision for plural bulb
137.1		. . Plug and receptacle for domestic service (i.e., 120v or 220v type)
137.2		. . . Outlet adapter or plug tap (i.e., increases the number of outlet receptacles)
137.3		. . . Including switch or circuit breaker
137.4		. . . Cord attached (e.g., extension cord or cord reel type)
138.1		. . Plug for domestic electric service (i.e., 120v or 220v type) (27)
138.2		. . . Grounded or three-prong type
139.1		. . Receptacle for domestic electric service (i.e., 120v or 220v type) (28)
139.2		. . . Track or conduit type
139.3		. . . For installation within junction box (29)
139.4		. . . Floor, ground or desktop mounted type
139.5		. . . . Utility pedestal
139.6		. . . Including switch or circuit breaker (30)
139.7		. . . Cord attached (e.g., extension cord or cord reel type)
139.8		. . . . Including switch or circuit breaker (i.e., outlet strip, block, or surge protector type) (30)
144		. . 12-volt cigarette lighter type
145		. . Heater or small appliance type
146		. . Three or more contacts (e.g., ports, terminals, etc.)
147		. . . Linear array of identical repeating ports or contacts (i.e., in-line array)
148		. . Ring or spade lug
149		. . Compressive engagement (e.g., clamped, crimped, etc.) (15)
150		. . . Wire nut type
151		. . Threaded engagement
152		. . Junction or outlet box (16)
153		. . Cable, wire or cladding therefor (17)
154		. . Element or attachment
155		. . . Conduit, duct or channel
156		. . . Cap, cover or boot
157		. . . Cable marker
158		. Switch or casing therefor (18)
159		. . Relay
160		. . Circuit breaker, current suppressor or fuse, or casing therefor (19)
161		. . . Fuse (20)
162		. . Control panel, console or module
162.1		. . . Programmable controller
163		. . . Console or floor type
164		. . . Linear array of three or more identical control or display elements
165		. . Photocell operated (21)
166		. . Solenoid operated
167		. . Foot operated
168		. . Hand held or remote type
169		. . Toggle, lever or rocker operated
170		. . Slide operated
171		. . Button operated
172		. . Reed type
173		. . Element or attachment
174		. . . Actuator (e.g., button, slide, etc.)
175		. . . . Blade or pivoting contact
176		. . . Reed switch
177		. . . Face panel or cover (22)
178		. . . Circuit breaker, current suppressor or fuse
179		. Heat sink
180		. Electron or vacuum tube (23)
181		. . Cathode ray
182		. Semiconductor, transistor or integrated circuit (24)
183		MAGNET (25)
184		CASING OR ENCLOSURE NOT ELSEWHERE SPECIFIED
199		MISCELLANEOUS (26)
		SEARCH NOTES FOR CLASS D13
		(1) Classified by both full lines and broken lines in claimed disclosure.
		(2) Includes ceramic briquette substitute.
		(3) Includes maser or laser. Includes transducer.
		(4) Excludes holder such as box, mount, etc.; see subclass 119.
		(5) Includes letter or numeral.
		(6) Includes "power supply". For diode or vacuum tube, see subclass 180.
		(7) Includes jumper cable set.
		(8) For control panel or console, i.e., with specific manual control element such as knob, etc. , see subclass 162. For programmable controller, see subclasses 162+.
		(9) Includes rheostat.
		(10) For coil, see subclass 117. For wire, see subclass 153.
		(11) For insulated wire, or wire cladding, see subclass 153.
		(12) Helical attachment provision not considered.
		(13) Includes mirror image symmetry. Helical attachment provision not considered.
		(14) Includes grounding bar. For battery connector, see subclass 120.
		(15) For biased engagement, see earlier subclasses.
		(16) For control panel or switch panel see, respectively, subclasses 162+ and 158+.
		(17) For cable marker, see subclass 157; For duct or channel, see subclass 155.
		(18) For general purpose control panel or module, see subclass 162. For rheostat, see subclass 125.
		(19) If control element such as switch, knob or lever is not disclosed, article is considered to be an element and is therefore classified in subclasses 173+. For combination with receptacle, see subclass 142.
		(20) Includes Bolder or block.
		(21) Includes photocell or receiver unit, per se.
		(22) If control element such as switch, knob, lever, etc. , is disclosed, article is considered to be a switch, per se, and is therefore classified above. For escutcheon, see D8-350+.
		(23) Includes diode. Includes magnetron.
		(24) Includes circuit board.
		(25) Includes magnetizer or demagnetizer.
		(26) Includes electrode not elsewhere specified.

Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231

tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

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Last Modified: 6 October 2000