US PATENT SUBCLASS 455 / 154.1
.~.~ With indication of frequency, channel, or selector condition (e.g., tuning aid)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
150.1  DF  .~ Signal selection based on frequency (e.g., tuning) {13}
154.1.~.~ With indication of frequency, channel, or selector condition (e.g., tuning aid) {6}
154.2  DF  .~.~.~> Scanning display
155.1  DF  .~.~.~> By meter
156.1  DF  .~.~.~> Audible indicator
157.1  DF  .~.~.~> Analog frequency indication (e.g., dial) {1}
158.1  DF  .~.~.~> Channel index indication {3}
159.1  DF  .~.~.~> Variable light indication {1}

DEFINITION

Classification: 455/154.1

With indication of frequency, channel, or selector condition (e.g., tuning aid):

(under subclass 150.1) Subject matter including means for making a condition pertaining to the tuning of the receiver perceptible to a human operator.

(1) Note. This subclass and the indented subclass may also include TV tuning or channel indicators wherein the TV receiver is broadly claimed which does not include any particular TV processing circuitry, e.g., horizontal or vertical sync circuitry, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115, for transmitters with tuning indicator.

145+, for receivers with panoramic display.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism, 10+, for mechanical radio tuning mechanisms which may include dial indication means.

116, Signals and Indicators,

241+, for radio tuning indicators.

324, Electricity: Measuring and Testing,

76.11+, for devices for measuring or testing electricity, per se, and having indication means, particularly indented subclasses 76.49 and 76.51 for frequency measuring systems employing tuned circuits.

329, Demodulators,

315+, for frequency detectors with indication means.

331, Oscillators,

64, for oscillator devices with indicating means.

334, Tuners, appropriate subclasses for tuning devices, per se, with indicating means.

342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),

350+, for directive radio energy receivers with indicating means. 345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

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

348, Television,

569+, for television receivers with tuning indicators.

381, Electrical Audio Signal Processing Systems and Devices,

12, for stereo receivers with indicators.