4. Communications: electrical
  5. Systems
  6. Audible signals

Roger Donn Bentley

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Decorative candle lamp

Illumination – Supports – Imitation candle support
Reexamination Certificate

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Electronic doorbell with reversible diode

Communications: electrical – Systems – Audible signals
Patent

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Wireless transmitter and doorbell system

Telecommunications – Transmitter and receiver at separate stations – Short range rf communication
Reexamination Certificate

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Wireless transmitter and doorbell system

Telecommunications – Transmitter
Reexamination Certificate

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Profile ID: LFUS-PAI-P-404622

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