4. Telephonic communications
  5. Echo cancellation or suppression

Dennis E. Wilkison

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Credit/debit authorization and financial transaction terminal or

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent

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Financial transaction terminal and card reader system adaptable

Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent

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Solid state isolation device using opto-isolators

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Patent

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Solid state isolation device using opto-isolators

Telephonic communications – Echo cancellation or suppression
Patent

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Solid state isolation device using opto-isolators

Telephonic communications – Echo cancellation or suppression
Patent

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Profile ID: LFUS-PAI-P-370005

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