4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Element or attachment

Robert L. Derhaag

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Belt-driven tape cartridge having increased tape capacity

Dynamic magnetic information storage or retrieval – Record medium – In container
Patent

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Headset construction and method of making same

Telephonic communications – Terminal – Housing or housing component
Patent

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Wireless microphone

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

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Profile ID: LFUS-PAI-P-657984

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