4. H - Electricity
  5. 04
  6. M

Richard W. Faith

H - Electricity – 04 – M

Inventor

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Details

Inventor

Country: United States Of America

Keypad/dialler interface for telephone test set

H - Electricity – 04 – M
Patent

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Subscriber/craftsperson ringback apparatus

H - Electricity – 01 – B
Patent

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Telephone ringing signal generator

H - Electricity – 04 – M
Patent

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Telephone test set

H - Electricity – 04 – M
Patent

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Telephone ringing signal generator

H - Electricity – 04 – M
Patent

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Profile ID: LFCA-PAI-P-1083419

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