US PATENT SUBCLASS 178 / 118
RECEIVERS

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

118RECEIVERS {4}
89  DF  .~> Code recorders {8}
98  DF  .~> Sounders {2}
119  DF  .~> Optical member
120  DF  .~> With electron tube or solid-state device

DEFINITION

Classification: 178/118

RECEIVERS:

(under the class definition) Miscellaneous devices for converting received telegraph signals into a perceptible form.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63, for long transmission line systems having large distributed capacitance, such as cables.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing, appropriate

subclasses for electric meters and electric meter movements.

329, Demodulators, appropriate subclasses for demodulators of the type used to demodulate radio waves.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, 2+, for electromagnetically actuated circuit controllers generally; and subclasses 220+ for electromagnets with armatures.

340, Communications: Electrical,

287+, for signal box receivers; subclasses 366+ for visual receivers; subclasses 384.1+ for audible receivers; and subclasses 407.1+ for miscellaneous, such as tactual receivers.

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

1+, for visual display systems with selective electrical control.

361, Electricity: Electrical Systems and Devices,

139+, for miscellaneous relay circuits.

370, Multiplex Communications, appropriate subclasses for multiplexing.

375, Pulse or Digital Communications, for pulse communications in general; and

316+, for pulse receivers.

455, Telecommunications,

130, for radio receivers generally.