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

Henry G. Grilk

Inventor

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Carbon monoxide detector

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Chemical
Patent

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Carbon monoxide health hazard monitor

Boots – shoes – and leggings
Patent

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Depth sounder

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Food preparation type
Patent

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Liquid level sender

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent

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Portable radiotelephone unit

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

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Profile ID: LFUS-PAI-P-660834

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