US PATENT SUBCLASS 257 / 187
.~.~ Having transistor structure

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

183  DF  HETEROJUNCTION DEVICE {10}
184  DF  .~ Light responsive structure {4}
187.~.~ Having transistor structure

DEFINITION

Classification: 257/187

Having transistor structure:

(under subclass 184) Subject matter wherein the light responsive heterojunction device has three terminals - an emitter, collector, and a base; a source, drain, and gate; or a hybrid combination of each, which can provide gain or can be used as a switch.