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Classification Resources
 
Class   D13EQUIPMENT FOR PRODUCTION, DISTRIBUTION, OR TRANSFORMATION OF ENERGY
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 [List of Pre Grant Publications for class D13 subclass 100][List of Patents for class D13 subclass 100]100 SOLID FUEL
[List of Pre Grant Publications for class D13 subclass 101][List of Patents for class D13 subclass 101]101 ENERGY CONVERSION OR TRANSFORMATION
[List of Pre Grant Publications for class D13 subclass 123][List of Patents for class D13 subclass 123]123 DISTRIBUTION, MODIFICATION OR CONTROL
 [List of Pre Grant Publications for class D13 subclass 124][List of Patents for class D13 subclass 124]124 Subclass 124 indent level is 1 Voltage regulator
 [List of Pre Grant Publications for class D13 subclass 125][List of Patents for class D13 subclass 125]125 Subclass 125 indent level is 1 Condenser, resistor or potentiometer (5)
[List of Pre Grant Publications for class D13 subclass 126][List of Patents for class D13 subclass 126]126 Subclass 126 indent level is 1 Vehicle ignition component (6)
 [List of Pre Grant Publications for class D13 subclass 128][List of Patents for class D13 subclass 128]128 Subclass 128 indent level is 1 Railway component
[List of Pre Grant Publications for class D13 subclass 129][List of Patents for class D13 subclass 129]129 Subclass 129 indent level is 1 Insulator (7)
[List of Pre Grant Publications for class D13 subclass 133][List of Patents for class D13 subclass 133]133 Subclass 133 indent level is 1 Connector, conductor or housing therefor (10)
[List of Pre Grant Publications for class D13 subclass 158][List of Patents for class D13 subclass 158]158 Subclass 158 indent level is 1 Switch or casing therefor (18)
 [List of Pre Grant Publications for class D13 subclass 179][List of Patents for class D13 subclass 179]179 Subclass 179 indent level is 1 Heat sink
[List of Pre Grant Publications for class D13 subclass 180][List of Patents for class D13 subclass 180]180 Subclass 180 indent level is 1 Electron or vacuum tube (23)
 [List of Pre Grant Publications for class D13 subclass 182][List of Patents for class D13 subclass 182]182 Subclass 182 indent level is 1 Semiconductor, transistor or integrated circuit (24)
 [List of Pre Grant Publications for class D13 subclass 183][List of Patents for class D13 subclass 183]183 MAGNET
 [List of Pre Grant Publications for class D13 subclass 184][List of Patents for class D13 subclass 184]184 CASING OR ENCLOSURE NOT ELSEWHERE SPECIFIED
 [List of Pre Grant Publications for class D13 subclass 199][List of Patents for class D13 subclass 199]199 MISCELLANEOUS
SEARCH NOTES FOR CLASS D13
(1) Excludes holder such as box, mount, etc.; see subclass 119.
(2) Includes letter or numeral.
(3) Includes "power supply". For diode or vacuum tube, see subclass 180.
(4) Includes jumper cable set.
(5) Includes rheostat.
(6) For coil, see subclass 117. For wire, see subclass 153.
(7) For insulated wire, or wire cladding, see subclass 153.
(8) Helical attachment provision not considered.
(9) Includes mirror image symmetry. Helical attachment provision not considered.
(10) Includes grounding bar. For battery connector, see subclass 120.
(11) For plug combined with receptacle, see subclass 137.1+.
(12) Includes covered receptacle where receptacle, per se, is invisible. For receptacle combined with plug, see subclass 137.1+.
(13) Faceplate excluded. For receptacle combined with faceplate, see subclass 139.1.
(14) For surge suppressor or circuit breaker, see subclass 160.
(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.