| Class Number |
Class Name |
No. of Patents |
| 307/95 |
Anti-electrolysis |
41 |
| 307/89 |
Anti-induction or coupling to other systems |
52 |
| 307/90 |
Inducing current control |
11 |
| 307/91 |
Magnetic or electrostatic field control (e.g., shielding) |
113 |
| 307/109 |
Capacitor |
142 |
| 307/110 |
Parallel-charge, series-discharge (e.g., voltage doublers) |
284 |
| 307/98 |
Combined impedance and switch systems |
44 |
| 307/99 |
Condition responsive switch |
24 |
| 307/147 |
Conductor arrangements or structure |
302 |
| 307/148 |
Multipart-conductor current equalization |
15 |
| 307/DIG.1 |
Data transmitted over power lines |
5 |
| 307/400 |
Electrets |
159 |
| 307/104 |
Electromagnet or highly inductive systems |
129 |
| 307/96 |
Intermittent regulatory interruption of system |
9 |
| 307/97 |
Condition responsive |
19 |
| 307/149 |
Miscellaneous systems |
141 |
| 307/151 |
Conversion systems |
98 |
| 307/154 |
For particular load device |
52 |
| 307/157 |
Lamp or discharge device |
77 |
| 307/155 |
Plural diverse load devices |
23 |
| 307/156 |
Structural load device combinations |
8 |
| 307/153 |
Generator control systems |
21 |
| 307/150 |
Power packs |
280 |
| 307/152 |
Rate of change responsive systems |
16 |
| 307/401 |
Nonlinear reactor systems (e.g., saturable) |
14 |
| 307/416 |
Amplifiers using nonlinear reactors (i.e., magnetic amplifiers) |
9 |
| 307/418 |
With feedback |
6 |
| 307/417 |
With transistors |
5 |
| 307/412 |
Driver circuits |
34 |
| 307/407 |
Logic circuits |
16 |
| 307/409 |
Clocking, delay or transmission line |
26 |
| 307/411 |
Exclusive or, and logic circuit |
6 |
| 307/408 |
Multiaperture |
5 |
| 307/410 |
Nor, not logic circuit |
2 |
| 307/406 |
Magnetic flip-flops |
4 |
| 307/419 |
Magnetic pulse generator |
31 |
| 307/420 |
Using multivibrator |
2 |
| 307/421 |
With specified output waveform |
0 |
| 307/415 |
Magnetic switching circuits |
26 |
| 307/414 |
Magnetic trigger devices |
2 |
| 307/422 |
Multiaperture |
0 |
| 307/423 |
Three apertures or ladder |
0 |
| 307/424 |
Parametric frequency converter |
24 |
| 307/402 |
Parametrons |
1 |
| 307/403 |
Thin film parametrons |
0 |
| 307/404 |
Using logic circuits |
2 |
| 307/405 |
Using pump energizer |
4 |
| 307/413 |
Signal sensor (e.g., current or frequency) |
24 |
| 307/111 |
Nonresponsive-to-frequency-change systems |
6 |
| 307/326 |
Personnel safety or limit control features |
217 |
| 307/328 |
Interlock |
63 |
| 307/327 |
Parasitic current suppression |
17 |
| 307/11 |
Plural load circuit systems |
137 |
| 307/30 |
Anticoupling of load circuits through same source |
39 |
| 307/42 |
Circuit arrangements or layouts |
60 |
| 307/12 |
Common conductor or return type |
31 |
| 307/16 |
Plural output generators |
47 |
| 307/13 |
Polyphase |
15 |
| 307/14 |
Phase balancing |
12 |
| 307/15 |
Voltage divider type |
14 |
| 307/31 |
Control of current or power |
264 |
| 307/33 |
Constant magnitude control |
36 |
| 307/34 |
By control of one or more load circuits |
66 |
| 307/35 |
Limit control |
117 |
| 307/32 |
Load current proportioning or dividing |
71 |
| 307/18 |
Plural sources of supply |
152 |
| 307/25 |
Diverse sources |
20 |
| 307/26 |
Ac and dc |
33 |
| 307/27 |
Different frequencies |
7 |
| 307/28 |
Different voltages |
44 |
| 307/19 |
Interconnected for energy transfer |
85 |
| 307/21 |
Diverse sources |
16 |
| 307/22 |
Ac and dc |
28 |
| 307/20 |
With control of magnitude of energy transfer |
26 |
| 307/29 |
Selectively connected loads and/or sources |
165 |
| 307/23 |
Substitute or alternate source |
83 |
| 307/24 |
With control of magnitude of current or power |
61 |
| 307/38 |
Selectively connected or controlled load circuits |
526 |
| 307/40 |
Code-controlled |
144 |
| 307/39 |
Condition responsive |
390 |
| 307/41 |
Sequential or alternating |
207 |
| 307/36 |
Serially connected load circuits |
46 |
| 307/37 |
Selective series-parallel connections |
24 |
| 307/17 |
Transformer connections |
97 |
| 307/43 |
Plural supply circuits or sources |
280 |
| 307/51 |
Circulating- or inter-current control or prevention |
39 |
| 307/85 |
Connecting or disconnecting |
234 |
| 307/86 |
Condition responsive |
208 |
| 307/87 |
Attainment of voltage, frequency or phase relationship |
293 |
| 307/72 |
Diverse or unlike electrical characteristics |
62 |
| 307/74 |
Differing capacities |
11 |
| 307/73 |
Differing frequencies |
31 |
| 307/75 |
Differing voltages |
94 |
| 307/76 |
Generator sources |
12 |
| 307/52 |
Load current control |
104 |
| 307/60 |
Constant load or current |
37 |
| 307/61 |
Serially connected sources |
6 |
| 307/53 |
Load current division |
37 |
| 307/55 |
Fixed or predetermined ratio |
9 |
| 307/56 |
Diverse-or unlike-type sources |
15 |
| 307/58 |
Plural converters |
66 |
| 307/57 |
Plural generators |
34 |
| 307/59 |
Peak or excess load |
13 |
| 307/54 |
Serially connected sources |
5 |
| 307/62 |
Load-limiting |
22 |
| 307/63 |
Serially connected sources |
18 |
| 307/70 |
Load transfer without paralleling sources |
47 |
| 307/44 |
One source floats across or compensates for other source |
141 |
| 307/47 |
Dynamoelectric-type source |
24 |
| 307/48 |
Storage battery or accumulator-type source |
126 |
| 307/50 |
Tap-changing or variable number of cells |
6 |
| 307/49 |
With series-connected auxiliary source |
4 |
| 307/45 |
With intervening converter |
79 |
| 307/46 |
Storage battery or accumulator-type source |
141 |
| 307/82 |
Plural converters |
256 |
| 307/84 |
Plural generators |
104 |
| 307/83 |
Plural transformers |
52 |
| 307/80 |
Selective or optional sources |
230 |
| 307/81 |
Predetermined sequence |
53 |
| 307/77 |
Series-connected sources |
54 |
| 307/78 |
Generator sources |
7 |
| 307/71 |
Series-parallel connection of sources |
70 |
| 307/69 |
Sources distributed along load circuit |
19 |
| 307/64 |
Substitute or emergency source |
899 |
| 307/68 |
Dynamoelectric |
62 |
| 307/65 |
Plural substitute sources |
136 |
| 307/66 |
Storage battery or accumulator |
1103 |
| 307/67 |
With intervening dynamoelectric machine |
34 |
| 307/101 |
Residual or remanent magnetism control |
22 |
| 307/100 |
Shunting or short circuiting systems |
45 |
| 307/102 |
Stabilized, anti-hunting or antioscillation systems |
47 |
| 307/1 |
Superimposed unlike currents |
20 |
| 307/2 |
Ac and dc sources |
39 |
| 307/3 |
Different frequencies or phase |
132 |
| 307/4 |
Different voltages |
14 |
| 307/5 |
Series-connected |
4 |
| 307/6 |
Plural converters |
3 |
| 307/7 |
Induction transformer |
9 |
| 307/8 |
Plural generators |
3 |
| 307/112 |
Switching systems |
351 |
| 307/116 |
Condition responsive |
639 |
| 307/125 |
Electrical |
533 |
| 307/128 |
Ac or dc discriminating |
23 |
| 307/131 |
Current |
148 |
| 307/129 |
Frequency |
69 |
| 307/127 |
Polarity, phase sequence or reverse flow |
201 |
| 307/126 |
Power or energy |
171 |
| 307/130 |
Voltage |
286 |
| 307/118 |
Fluid pressure, density, level, velocity or humidity |
269 |
| 307/117 |
Light, heat, vibratory or radiant energy |
493 |
| 307/119 |
Mechanical force |
157 |
| 307/120 |
Speed, centrifugal or kinetic force |
25 |
| 307/123 |
Differential speed between two bodies |
6 |
| 307/122 |
Direction of rotation |
17 |
| 307/121 |
Inertia or acceleration |
60 |
| 307/124 |
Torque |
6 |
| 307/113 |
Plural switches |
192 |
| 307/114 |
Lazy-man switch type |
45 |
| 307/115 |
Selectively actuated |
287 |
| 307/132R |
Repetitive make and break |
40 |
| 307/132E |
Electronically controlled relay |
79 |
| 307/132EA |
Responsive to physical condition |
21 |
| 307/132M |
Miscellaneous |
10 |
| 307/132T |
Thermal relay |
6 |
| 307/132V |
Vibrating relay |
1 |
| 307/139 |
Switch actuation |
238 |
| 307/143 |
Electrical actuator |
34 |
| 307/144 |
Fluid-pressure actuator |
17 |
| 307/140 |
Power circuit controlled |
355 |
| 307/142 |
With locking, holding or braking means |
51 |
| 307/141 |
With time delay or retardation means |
337 |
| 307/141.4 |
Electrically initiated |
170 |
| 307/141.8 |
Series connected switches |
47 |
| 307/134 |
With operation facilitating feature |
70 |
| 307/135 |
Preliminary reduction in current or voltage of system |
37 |
| 307/137 |
Switch contact conditioning |
43 |
| 307/138 |
Polarity reversing |
29 |
| 307/146 |
Unidirectional conductor systems |
30 |
| 307/9.1 |
Vehicle mounted systems |
687 |
| 307/10.1 |
Automobile |
2013 |
| 307/10.2 |
Antitheft |
788 |
| 307/10.3 |
Ignition or starting circuit lock |
359 |
| 307/10.5 |
Coded record input (e.g., ic card) |
293 |
| 307/10.4 |
Manual code input (e.g., push button) |
175 |
| 307/10.7 |
Battery protection |
255 |
| 307/10.6 |
Ignition or starter circuits |
314 |
| 307/10.8 |
Lighting circuits |
530 |
| 307/106 |
Wave form or wave shape determinative or pulse-producing systems |
276 |
| 307/108 |
With capacitor |
140 |
| 307/107 |
With rectification or derectification |
44 |
| 307/145 |
With current collection or transfer |
10 |
| 307/105 |
With harmonic filter or neutralizer |
197 |
| 307/103 |
With line drop compensation |
31 |
| 307/650 |
With nonswitching means responsive to external nonelectrical condition |
55 |
| 307/653 |
Flame responsive (e.g., flame acts as a rectifier in circuit) |
22 |
| 307/652 |
Responsive to approach or passage of an object |
87 |
| 307/651 |
Temperature responsive |
33 |
