US PATENT SUBCLASS 361 / 197
.~.~.~.~ Threshold device (e.g., zener, schockley diode)

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

139  DF  CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES {7}
160  DF  .~ For relays or solenoids {11}
195  DF  .~.~ Time delay {3}
196  DF  .~.~.~ Including semiconductor device connected to timing element {1}
197.~.~.~.~ Threshold device (e.g., zener, schockley diode) {1}
198  DF  .~.~.~.~.~> Including three or more electrodes (e.g., unijunction)

DEFINITION

Classification: 361/197

Threshold device (e.g., zener, schockley diode):

(under subclass 196) Subject matter wherein a semiconductor device conducts current when the potential applied across it reaches a specific value.

SEE OR SEARCH THIS CLASS, SUBCLASS:

200, and 205, for threshold devices in other control circuits.