4. Telephonic communications
  5. Substation or terminal circuitry
  6. Hold circuit

Chyi-Chang Wu

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Electrical matrix keyboard scanning circuit

Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent

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Keyboard scanning circuit

Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent

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Telephone hold circuit

Telephonic communications – Substation or terminal circuitry – Hold circuit
Patent

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Profile ID: LFUS-PAI-P-1137443

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