US PATENT SUBCLASS 377 / 128
.~ Using bistable semiconductors having only two electrodes (e.g., tunnel diode, multilayer diode)

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377 /   HD   ELECTRICAL PULSE COUNTERS, PULSE DIVIDERS, OR SHIFT REGISTERS: CIRCUITS AND SYSTEMS

118  DF  PULSE COUNTING OR DIVIDING CHAINS {4}
128.~ Using bistable semiconductors having only two electrodes (e.g., tunnel diode, multilayer diode)

DEFINITION

Classification: 377/128

Using bistable semiconductors having only two electrodes (e.g., tunnel diode, multilayer diode):

(under subclass 118) Subject matter where each stage utilizes semiconductors having two stable states and having only two electrodes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

119, for chains using bistable regenerative trigger circuits.