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

Joseph L. Whitehead

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Clock synchronization scheme for digital transmission

Pulse or digital communications – Spread spectrum – Direct sequence
Patent

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D type flip-flop oscillator

Oscillators – Electromechanical resonator – Crystal
Patent

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Distributed ethernet hub

Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate

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High gain amplifier for reception of low level pulse code modula

Pulse or digital communications – Repeaters – Testing
Patent

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Metallic current limiter

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Profile ID: LFUS-PAI-P-277759

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