US PATENT SUBCLASS 257 / 166
.~.~.~ Radially symmetric regions

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

107  DF  REGENERATIVE TYPE SWITCHING DEVICE (E.G., SCR, COMFET, THYRISTOR) {19}
163  DF  .~ Emitter region feature {1}
164  DF  .~.~ Multi-emitter region (e.g., emitter geometry or emitter ballast resistor) {2}
166.~.~.~ Radially symmetric regions

DEFINITION

Classification: 257/166

Radially symmetric regions:

(under subclass 164) Subject matter wherein the plural emitters are located in regions of the device which are symmetrical extending radially in a horizontal direction from a predetermined emitter location.