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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 307 | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
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1 | SUPERIMPOSED UNLIKE CURRENTS |
9.1 | VEHICLE MOUNTED SYSTEMS |
11 | PLURAL LOAD CIRCUIT SYSTEMS |
12 | Common conductor or return type |
17 | Transformer connections |
18 | Plural sources of supply |
19 | Interconnected for energy transfer |
23 | Substitute or alternate source |
24 | With control of magnitude of current or power |
25 | Diverse sources |
29 | Selectively connected loads and/or sources |
30 | Anticoupling of load circuits through same source |
31 | Control of current or power |
36 | Serially connected load circuits |
38 | Selectively connected or controlled load circuits |
42 | Circuit arrangements or layouts |
43 | PLURAL SUPPLY CIRCUITS OR SOURCES |
44 | One source floats across or compensates for other source |
45 | With intervening converter |
47 | Dynamoelectric-type source |
48 | Storage battery or accumulator-type source |
51 | Circulating- or inter-current control or prevention |
52 | Load current control |
53 | Load current division |
60 | Constant load or current |
62 | Load-limiting |
63 | Serially connected sources |
64 | Substitute or emergency source |
69 | Sources distributed along load circuit |
70 | Load transfer without paralleling sources |
71 | Series-parallel connection of sources |
72 | Diverse or unlike electrical characteristics |
77 | Series-connected sources |
80 | Selective or optional sources |
82 | Plural converters |
83 | Plural transformers |
84 | Plural generators |
85 | Connecting or disconnecting |
400 | ELECTRETS |
401 | NONLINEAR REACTOR SYSTEMS (E.G., SATURABLE) |
402 | Parametrons |
406 | Magnetic flip-flops |
407 | Logic circuits |
408 | Multiaperture |
409 | Clocking, delay or transmission line |
410 | Nor, Not logic circuit |
411 | Exclusive Or, And logic circuit |
412 | Driver circuits |
413 | Signal sensor (e.g., current or frequency) |
414 | Magnetic trigger devices |
415 | Magnetic switching circuits |
416 | Amplifiers using nonlinear reactors (i.e., magnetic amplifiers) |
419 | Magnetic pulse generator |
422 | Multiaperture |
424 | Parametric frequency converter |
326 | PERSONNEL SAFETY OR LIMIT CONTROL FEATURES |
89 | ANTI-INDUCTION OR COUPLING TO OTHER SYSTEMS |
95 | ANTI-ELECTROLYSIS |
96 | INTERMITTENT REGULATORY INTERRUPTION OF SYSTEM |
98 | COMBINED IMPEDANCE AND SWITCH SYSTEMS |
100 | SHUNTING OR SHORT CIRCUITING SYSTEMS |
101 | RESIDUAL OR REMANENT MAGNETISM CONTROL |
102 | STABILIZED, ANTI-HUNTING OR ANTIOSCILLATION SYSTEMS |
103 | WITH LINE DROP COMPENSATION |
104 | ELECTROMAGNET OR HIGHLY INDUCTIVE SYSTEMS |
105 | WITH HARMONIC FILTER OR NEUTRALIZER |
106 | WAVE FORM OR WAVE SHAPE DETERMINATIVE OR PULSE-PRODUCING SYSTEMS |
109 | CAPACITOR |
111 | NONRESPONSIVE-TO-FREQUENCY-CHANGE SYSTEMS |
650 | WITH NONSWITCHING MEANS RESPONSIVE TO EXTERNAL NONELECTRICAL CONDITION |
651 | Temperature responsive |
652 | Responsive to approach or passage of an object |
653 | Flame responsive (e.g., flame acts as a rectifier in circuit) |
112 | SWITCHING SYSTEMS |
113 | Plural switches |
116 | Condition responsive |
117 | Light, heat, vibratory or radiant energy |
118 | Fluid pressure, density, level, velocity or humidity |
119 | Mechanical force |
125 | Electrical |
132R | Repetitive make and break |
134 | With operation facilitating feature |
139 | Switch actuation |
145 | WITH CURRENT COLLECTION OR TRANSFER |
146 | UNIDIRECTIONAL CONDUCTOR SYSTEMS |
147 | CONDUCTOR ARRANGEMENTS OR STRUCTURE |
149 | MISCELLANEOUS SYSTEMS |
150 | Power packs |
151 | Conversion systems |
152 | Rate of change responsive systems |
153 | Generator control systems |
154 | For particular load device |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
DIGESTS | ||
DIG1 | DATA TRANSMITTED OVER POWER LINES |
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