US PATENT SUBCLASS 257 / 273
.~.~.~ With bipolar device

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

213  DF  FIELD EFFECT DEVICE {6}
256  DF  .~ Junction field effect transistor (unipolar transistor) {15}
272  DF  .~.~ Junction field effect transistor in integrated circuit {4}
273.~.~.~ With bipolar device

DEFINITION

Classification: 257/273

With bipolar device:

(under subclass 272) Subject matter located in an integrated circuit with a device which operates using both positive and negative charge carriers.

(1) Note. An active solid-state electronic device that contains both bipolar and field effect transistors may be referred to as a BI-FET device.