4. Telephonic communications
  5. Supervisory or control line signaling
  6. Signal reception at substation

Alan Dean Michel

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Architecture for telephone set

Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit
Patent

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Bell sound synthesizer

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Patent

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Direction finder

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate

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Intelligent acoustic systems peripheral

Telephonic communications – Echo cancellation or suppression
Patent

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Intelligent acoustic systems peripheral

Boots – shoes – and leggings
Patent

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Profile ID: LFUS-PAI-P-389408

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