LandOfFree - US Patents - Listing for Telephonic communications,Substation or terminal circuitry,Amplifying

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Telephone amplifier with switchable gain control

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone handset amplifier circuit

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone handset interface device

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone handset microphone level adjustment

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone handset with user-adjustable amplitude, default...

Telephonic communications – Substation or terminal circuitry – Amplifying

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone headset amplifier with battery saver, receive line noi

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone headset amplifier with battery saver, receive line noi

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone headset interface circuit

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone line monitor amplifier

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Telephone power supply

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Time dependant, variable amplitude threshold output circuit for

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Time dependent, variable amplitude threshold output circuit for

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Transmit by-pass cable

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

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