US PATENT SUBCLASS 257 / 8
.~.~ Three or more terminal device

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

1  DF  BULK EFFECT DEVICE {2}
6  DF  .~ Intervalley transfer (e.g., Gunn effect) {2}
8.~.~ Three or more terminal device

DEFINITION

Classification: 257/8

Three or more terminal device:

(under subclass 6) Subject matter wherein an intervalley transfer device contains three or more electrical terminals.