4. Telecommunications
  5. Receiver or analog modulated signal frequency converter
  6. Noise or interference elimination

Ralph Mason

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Directly tuned filter and method of directly tuning a filter

Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate

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High quality, low power, wireless audio system

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
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Profile ID: LFUS-PAI-P-2950010

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