US PATENT SUBCLASS 257 / 109
.~ Having only two terminals and no control electrode (gate) (e.g., Shockley diode)

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}
109.~ Having only two terminals and no control electrode (gate) (e.g., Shockley diode) {3}
110  DF  .~.~> More than four semiconductor layers of alternating conductivity types (e.g., pnpnpn structure, 5 layer bidirectional diacs, etc.)
111  DF  .~.~> Triggered by VBO overvoltage means
112  DF  .~.~> With highly-doped breakdown diode trigger

DEFINITION

Classification: 257/109

Having only two terminals and no control electrode (gate), e.g., Shockley diode:

(under subclass 107) Subject matter wherein the regenerative switching device has only two electrical terminals, neither one of which is a control electrode (e.g., gate or base electrode).