US PATENT SUBCLASS 455 / 265
.~.~.~.~ With local oscillator synchronization or locking

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
230  DF  .~ Local control of receiver operation {7}
255  DF  .~.~ Local oscillator frequency control {2}
257  DF  .~.~.~ Automatic {2}
265.~.~.~.~ With local oscillator synchronization or locking

DEFINITION

Classification: 455/265

With local oscillator synchronization or locking:

(under subclass 257) Subject matter including means whereby a

predetermined phase or frequency relationship is maintained between the output of at least one local oscillator and a standard or synchronizing source or wherein the frequency of one or both of two oscillating systems which are coupled together are shifted and automatically held in such a relationship that the two frequencies have the ratio of two integral numbers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

208+, for frequency or phase modulation type receivers with synchronized or controlled local oscillator means.

502+, for complete systems comprising plural transmitters and/or receivers with synchronizing means.

SEE OR SEARCH CLASS

331, Oscillators, for synchronized oscillators;

18+, for automatic frequency control type; subclass 55 for plural oscillators; subclass 145 for multivibrators; subclass 149 for blocking oscillators; and subclass 172 for oscillators of general utility and having synchronizing means. 375, Pulse or Digital Communications,

354+, for synchronizing systems which may utilize oscillators of the automatic frequency stabilized type.