4. Telecommunications
  5. Receiver or analog modulated signal frequency converter
  6. Signal selection based on frequency

William A. Allen

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Audio signal processing

Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic
Reexamination Certificate

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Automatic astroposition determination apparatus

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent

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Radio receiving with microprocessor control

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent

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Transceiving remote controlling

Communications: electrical – Continuously variable indicating – With meter reading
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1382197

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