US PATENT SUBCLASS 257 / 80
.~ In combination with or also constituting light responsive device

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

79  DF  INCOHERENT LIGHT EMITTER STRUCTURE {10}
80.~ In combination with or also constituting light responsive device {3}
81  DF  .~.~> With specific housing or contact structure {1}
83  DF  .~.~> Light coupled transistor structure
84  DF  .~.~> Combined in integrated structure {1}

DEFINITION

Classification: 257/80

In combination with or also constituting light responsive device:

(under subclass 79) Subject matter wherein the light emitting active semiconductor device is combined with a separate device which generates an electrical signal when light impinges upon it or the active device both emits light when stimulated and generates an electrical signal in response to light impingent thereupon.

SEE OR SEARCH CLASS

250, Radiant Energy,

551, for signal isolators involving a light source and photodetector.