4. Pulse or digital communications
  5. Repeaters
  6. Testing

John S. Petty, Jr.

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Apparatus and methods for frequency control in a...

Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Reexamination Certificate

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Lockup prevention method and apparatus

Pulse or digital communications – Repeaters – Testing
Patent

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Method and apparatus for constructing and operating multipoint c

Communications: electrical – Continuously variable indicating – With meter reading
Patent

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Profile ID: LFUS-PAI-P-1560843

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