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

Donald Karl Whitney, Jr.

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Circuit and method for loopback test and on-hook transmission in

Pulse or digital communications – Repeaters – Testing
Patent

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Method and circuit for failsafe switch-hook detection during fau

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Profile ID: LFUS-PAI-P-1243213

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