US PATENT SUBCLASS 257 / 158
.~.~ Three or more amplification stages

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

107  DF  REGENERATIVE TYPE SWITCHING DEVICE (E.G., SCR, COMFET, THYRISTOR) {19}
157  DF  .~ With integrated trigger signal amplification means (e.g., amplified gate, "pilot thyristor", etc.) {4}
158.~.~ Three or more amplification stages

DEFINITION

Classification: 257/158

Three or more amplification stages:

(under subclass 157) Subject matter wherein the amplification means has three or more stages of amplification.