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

Frederick A. Williams

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High resolution digital phase detector

Television – Synchronization – Locking of video or audio to reference timebase
Patent

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Processor based linked compressor-expander telecommunications sy

Pulse or digital communications – Repeaters – Testing
Patent

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Vehicle-mounted, rear-directed message display apparatus

Card – picture – or sign exhibiting – Signs – Automotive vehicle carried
Reexamination Certificate

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Wall picture leveling tack

Tools and hardware – Fastener – support or mount not elsewhere specified – Fastener or coupling
Patent

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Profile ID: LFUS-PAI-P-1365628

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