4. Surgery
  5. Respiratory method or device
  6. Means for transmitting, or facilitating, voice communication...

Lonnie Joe Kettl

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Microphone mounting structure for a sound amplifying respirator

Surgery – Respiratory method or device – Means for transmitting – or facilitating – voice communication...
Patent

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Microphone mounting structure for a sound amplifying...

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

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Profile ID: LFUS-PAI-P-1334735

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