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

Allan G. Mlodzikowski

Inventor

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Hands-free personal communication device

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate

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Infrared stereo speaker system

Electrical audio signal processing systems and devices – One-way audio signal program distribution
Patent

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Stereo headphones with plug, receptacle and securing plates

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

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Stereophone ear plug

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

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Stereophone ear plug housing

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

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Profile ID: LFUS-PAI-P-373363

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