4. Surgery
  5. Respiratory method or device
  6. Face mask covering a breathing passage

Tom McDonald

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Microphone signal attenuating apparatus for oxygen masks

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

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Safety stowage apparatus for crew oxygen masks

Surgery – Respiratory method or device – Face mask covering a breathing passage
Patent

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Profile ID: LFUS-PAI-P-160921

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