US PATENT SUBCLASS 379 / 368
.~.~ Plural-switch number input device (e.g., keypad)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

350  DF  SUPERVISORY OR CONTROL LINE SIGNALLING {5}
352  DF  .~ Substation originated {8}
368.~.~ Plural-switch number input device (e.g., keypad)

DEFINITION

Classification: 379/368

Plural-switch number input device (e.g., keypad):

(under subclass 352) Subject matter including a manually actuated device having several switches for determining the content of the selective control signal.

SEE OR SEARCH CLASS

341, Coded Data Generation or Conversion,

20+, and 173+ for code transmitters.