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

William J. Nielsen

Inventor

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Noise monitor

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Element or attachment
Design Patent

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Respirator apparatus

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

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Profile ID: LFUS-PAI-P-1065547

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