US PATENT SUBCLASS 377 / 27
SYSTEMS

Current as of: June, 1999
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377 /   HD   ELECTRICAL PULSE COUNTERS, PULSE DIVIDERS, OR SHIFT REGISTERS: CIRCUITS AND SYSTEMS

27SYSTEMS {21}
28  DF  .~> Identifying or correcting improper counter operation (e.g., error checking, monitoring; preventing or correcting improper counter operation) {2}
33  DF  .~> Using particular code or particular counting sequence {3}
37  DF  .~> Sequential readout of plural counters or sequential sampling of inputs to a counter
38  DF  .~> Plug in counter
39  DF  .~> Comparing counts
40  DF  .~> Nonsignificant zero elimination
41  DF  .~> Complementing a count
42  DF  .~> Converting input or output signal from or to an analogue signal
43  DF  .~> Having phase shift
44  DF  .~> Counter controlled counter
45  DF  .~> Including reversible counter
46  DF  .~> Including ring counter
47  DF  .~> Pulse multiplication or division {1}
49  DF  .~> Counter includes circuit for performing an arithmetic function
50  DF  .~> Compensation for excess or shortage of pulses
51  DF  .~> Including structure for detecting or indicating overflow condition
52  DF  .~> With programmable counter (i.e., with variable base)
53  DF  .~> With photoelectric sensor
54  DF  .~> Using shift register
55  DF  .~> Particular input circuit
56  DF  .~> Particular output circuit

DEFINITION

Classification: 377/27

SYSTEMS:

(under the class definition) Subject matter where the circuitry involved includes more than a counter or shift

register, per se, but is not sufficient for classification with a particular art device.