4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Plural or compound reproducers

Dean W. Flygstad

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Adjustable tension support band for headset

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent

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Automatic tape player-changer

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Patent

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Electret transducer and method of fabrication

Electrical transmission or interconnection systems – Electrets
Patent

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Headset

Patent

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Recording apparatus for cassette copying

Dynamic magnetic information storage or retrieval – Record copying
Patent

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Profile ID: LFUS-PAI-P-833863

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