| Class Number |
Class Name |
No. of Patents |
| 323/318 |
External or operator controlled |
49 |
| 323/320 |
Phase controlled switching using electronic tube or a three or more terminal semiconductive device |
65 |
| 323/324 |
Using single unidirectional element with bidirectional pass |
79 |
| 323/325 |
With a three or more terminal semiconductive device in trigger circuit |
32 |
| 323/326 |
Including ramp generator or controlled capacitor charging |
63 |
| 323/322 |
With digital control |
75 |
| 323/323 |
With interval timer |
38 |
| 323/327 |
With passive element only in trigger circuit |
16 |
| 323/321 |
With soft start |
18 |
| 323/349 |
Using a three or more terminal semiconductive device as the final control device |
88 |
| 323/350 |
Including plural final control devices |
81 |
| 323/351 |
Switched (e.g., switching regulators) |
291 |
| 323/328 |
Using a transformer or inductor as the final control device |
19 |
| 323/329 |
Controllably saturable |
9 |
| 323/339 |
Including an electronic tube or a three or more terminal semiconductive device in control circuit |
7 |
| 323/331 |
With core having a gap, aperture, or slot |
25 |
| 323/330 |
With permanent magnet |
6 |
| 323/338 |
With plural cores |
11 |
| 323/332 |
With plural power windings |
1 |
| 323/333 |
In bridge configuration or in bridge arm |
3 |
| 323/335 |
On different cores |
10 |
| 323/336 |
Multistage |
2 |
| 323/337 |
Push-pull |
3 |
| 323/334 |
On different legs of single core |
13 |
| 323/345 |
Having a switch in series with winding |
12 |
| 323/340 |
Having a variable length winding (e.g., tapped) as the final control device |
54 |
| 323/343 |
With a three or more terminal semiconductive device |
41 |
| 323/341 |
With motor driven tap switch |
35 |
| 323/342 |
With other transformer |
9 |
| 323/344 |
Having a windng in series with the source and load (e.g., buck-boost) |
35 |
| 323/347 |
Having movable structure or winding |
18 |
| 323/348 |
Including rotary motion |
11 |
| 323/346 |
Having series-parallel connectable windings |
10 |
| 323/352 |
Using an impedance as the final control device |
33 |
| 323/353 |
Resistor |
30 |
| 323/354 |
Selective |
131 |
| 323/319 |
Zero switching |
82 |
| 323/212 |
For phase shift or control |
45 |
| 323/213 |
By splitting and combining |
12 |
| 323/217 |
Using a three or more terminal semiconductive device |
44 |
| 323/218 |
Using impedance |
26 |
| 323/219 |
In bridge |
7 |
| 323/214 |
Using saturable inductor |
9 |
| 323/215 |
Using transformer |
40 |
| 323/216 |
With movable structure or winding |
9 |
| 323/205 |
For reactive power control |
94 |
| 323/207 |
Using converter |
344 |
| 323/208 |
Using impedance |
67 |
| 323/209 |
Switched impedance |
79 |
| 323/210 |
Static switch |
163 |
| 323/211 |
Digitally controlled |
116 |
| 323/206 |
Using saturable inductor |
16 |
| 323/220 |
In shunt with source or load |
31 |
| 323/221 |
Photo responsive |
24 |
| 323/223 |
Using a three or more terminal semiconductive device |
140 |
| 323/226 |
Linearly acting |
61 |
| 323/225 |
Plural devices |
216 |
| 323/224 |
With additional series regulator |
370 |
| 323/222 |
Using choke and switch across source |
1026 |
| 323/229 |
Using diode |
23 |
| 323/230 |
Inverse parallel |
11 |
| 323/231 |
Zener |
54 |
| 323/227 |
Using electronic tube |
4 |
| 323/228 |
With additional series regulator |
4 |
| 323/233 |
Using impedance |
29 |
| 323/232 |
Using inductor |
12 |
| 323/201 |
Including a dynamoelectric machine |
12 |
| 323/202 |
Balancer sets |
1 |
| 323/204 |
Condition responsive |
12 |
| 323/203 |
With plural sets of slip rings or brushes |
1 |
| 323/355 |
Including a transformer or an inductor |
78 |
| 323/358 |
Current transformer |
38 |
| 323/363 |
Inductor with or in a bridge |
13 |
| 323/361 |
Polyphase or plural transformers |
81 |
| 323/359 |
Potential transformer |
22 |
| 323/360 |
Superconductive |
53 |
| 323/356 |
With compensation |
79 |
| 323/357 |
For current transformer |
41 |
| 323/362 |
With core having permanent magnet or air gap |
39 |
| 323/364 |
Including an impedance |
54 |
| 323/368 |
Hall effect device or magnetoresistor |
47 |
| 323/365 |
In a bridge |
23 |
| 323/367 |
Resistor only |
30 |
| 323/366 |
Thermistor |
18 |
| 323/369 |
Thermistor or resistor |
57 |
| 323/370 |
With capacitor |
25 |
| 323/299 |
Input level responsive |
319 |
| 323/300 |
Phase controlled switching using electronic tube or a three or more terminal semiconductive device |
126 |
| 323/303 |
Using a linearly acting final control device |
171 |
| 323/301 |
Using a transformer or inductor as the final control device |
43 |
| 323/302 |
Saturable |
11 |
| 323/908 |
Inrush current limiters |
244 |
| 323/905 |
Lamp dimmer structure |
77 |
| 323/911 |
Medical electronics |
24 |
| 323/371 |
Miscellaneous |
13 |
| 323/902 |
Optical coupling to semiconductor |
122 |
| 323/234 |
Output level responsive |
75 |
| 323/237 |
Phase controlled switching using electronic tube or a three or more terminal semiconductive device |
95 |
| 323/242 |
Including ramp generator or controlled capacitor charging |
60 |
| 323/243 |
As input to comparator |
46 |
| 323/240 |
Including saturable inductor in trigger circuit |
10 |
| 323/239 |
Including single unidirectional element with bidirectional pass |
75 |
| 323/241 |
With digital control |
85 |
| 323/245 |
With nonelectrical condition sensing |
27 |
| 323/246 |
With plural condition sensing |
59 |
| 323/238 |
With soft start |
47 |
| 323/244 |
With synchronization |
44 |
| 323/265 |
Using a three or more terminal semiconductive device as the final control device |
70 |
| 323/268 |
Including plural final control devices |
218 |
| 323/269 |
Linearly acting parallel connected |
114 |
| 323/270 |
Linearly acting series connected |
71 |
| 323/271 |
Switched (e.g., on-off control) |
355 |
| 323/272 |
Parallel connected |
375 |
| 323/267 |
Including plural loads commonly controlled |
251 |
| 323/266 |
Including pre or post regulation |
323 |
| 323/273 |
Linearly acting |
299 |
| 323/280 |
With a specific feedback amplifier (e.g., integrator, summer) |
401 |
| 323/275 |
With plural condition sensing |
161 |
| 323/276 |
For protective system |
140 |
| 323/277 |
With current sensor |
211 |
| 323/278 |
Having base-emitter of transistor coupled across sensor |
47 |
| 323/279 |
Including final control device parameter |
32 |
| 323/281 |
With reference voltage circuitry |
306 |
| 323/274 |
With threshold detection |
317 |
| 323/282 |
Switched (e.g., switching regulators) |
1430 |
| 323/283 |
Digitally controlled |
571 |
| 323/289 |
With base drive control dissipation |
164 |
| 323/290 |
With inductor in control circuit |
104 |
| 323/285 |
With plural condition sensing |
761 |
| 323/286 |
Including filter sensing |
109 |
| 323/287 |
In flyback path |
80 |
| 323/288 |
With ramp generator or controlled capacitor charging |
356 |
| 323/284 |
With threshold detection |
916 |
| 323/247 |
Using a transformer or inductor as the final control device |
41 |
| 323/249 |
Controllably saturable |
20 |
| 323/254 |
With electronic tube or a three or more terminal semiconductive device in control circuit |
22 |
| 323/251 |
With plural power windings |
20 |
| 323/252 |
In bridge configuration or in bridge arm |
1 |
| 323/253 |
On different cores |
15 |
| 323/250 |
With specific core structure (e.g., gap, aperture, slot, permanent magnet) |
40 |
| 323/248 |
Ferroresonant |
29 |
| 323/255 |
Having a variable length winding (e.g., tapped) as the final control device |
74 |
| 323/258 |
With electronic tube or a three or more terminal semiconductive device as tap switch |
63 |
| 323/256 |
With motor driven tap switch |
30 |
| 323/257 |
Including an electronic tube or a three or more terminal semiconductive device in control circuit |
24 |
| 323/259 |
Having a winding in series with the source and load (e.g., buck-boost) |
97 |
| 323/262 |
Plural windngs in series |
22 |
| 323/263 |
With electronic tube or a three or more terminal semiconductive device in control circuit |
44 |
| 323/260 |
With motor in control circuit |
12 |
| 323/261 |
With saturable reactor in control circuit |
7 |
| 323/264 |
Having movable structure or winding |
13 |
| 323/291 |
Using an electronic tube as the final control device |
4 |
| 323/292 |
With a three or more terminal semiconductive device in control circuit |
5 |
| 323/293 |
Using an impedance as the final control device |
36 |
| 323/294 |
Hall effect device, magnetoresistor or thermistor |
21 |
| 323/296 |
Liquid contact resistor |
3 |
| 323/297 |
Plural selective resistors |
40 |
| 323/295 |
Pressure sensitive resistor |
0 |
| 323/298 |
Variable resistor |
29 |
| 323/235 |
Zero switching |
179 |
| 323/236 |
Nonelectrical condition sensing |
36 |
| 323/903 |
Precipitators |
128 |
| 323/909 |
Remote sensing |
30 |
| 323/304 |
Self-regulating (e.g., nonretroactive) |
27 |
| 323/311 |
Using a three or more terminal semiconductive device as the final control device |
75 |
| 323/312 |
For current stabilization |
360 |
| 323/315 |
Including parallel paths (e.g., current mirror) |
1190 |
| 323/316 |
With amplifier connected to or between current paths |
739 |
| 323/317 |
With switched final control device |
153 |
| 323/313 |
To derive a voltage reference (e.g., band gap regulator) |
846 |
| 323/314 |
With additional stage |
415 |
| 323/305 |
Using a transformer or inductor as the final control device |
17 |
| 323/310 |
Controllably saturable |
12 |
| 323/306 |
Ferroresonant |
22 |
| 323/308 |
With core having an air gap or magnetic shunt |
19 |
| 323/309 |
Including a ferrocapacitor across a tertiary winding |
12 |
| 323/307 |
With plural cores |
11 |
| 323/906 |
Solar cell systems |
274 |
| 323/901 |
Starting circuits |
357 |
| 323/907 |
Temperature compensation of semiconductor |
427 |
| 323/904 |
Touch systems |
33 |
| 323/910 |
Two of three phases regulated |
18 |
