4. Telecommunications
  5. Receiver or analog modulated signal frequency converter
  6. Signal selection based on frequency

Charles E. Pfund

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Method and apparatus for obtaining maximum sail boat velocity

Ships – Sail or control means therefor – Specific sail structure or arrangement
Patent

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Method and apparatus for viewing a golf putting green

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Reexamination Certificate

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Secure communication system

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent

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Secure communication system

Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent

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Profile ID: LFUS-PAI-P-832179

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