US PATENT SUBCLASS 375 / 303
.~.~ Frequency shift keying

Current as of: June, 1999
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375 /   HD   PULSE OR DIGITAL COMMUNICATIONS

295  DF  TRANSMITTERS {6}
302  DF  .~ Angle modulation {2}
303.~.~ Frequency shift keying {4}
304  DF  .~.~.~> Antenna tuning with frequency shift
305  DF  .~.~.~> Minimum shift keying
306  DF  .~.~.~> One oscillator
307  DF  .~.~.~> Two or more oscillators

DEFINITION

Classification: 375/303

Frequency shift keying:

(under subclass 302) Subject matter where the frequency of the carrier wave shifts between predetermined values in accordance with the value of the modulating pulse wave.

SEE OR SEARCH THIS CLASS, SUBCLASS:

211, for frequency shift keyed repeaters.

272, for frequency shift keyed systems.

334+, for frequency shift keyed receivers.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

182, for a frequency modulated light wave transmitter.