4. Telephonic communications
  5. Substation or terminal circuitry
  6. Amplifying

Shu-Ren Chen

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Apparatus for and method of operating an automatic log on/log of

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Headset amplifier with automatic log on/log off detection

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Headset amplifier with automatic log on/log off detection

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Hinged acoustical voice tube

Acoustics – Speaking tubes – Tubes
Patent

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Telephone headset amplifier with battery saver, receive line noi

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Profile ID: LFUS-PAI-P-310309

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