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

David C. Stark

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Chemical process fired heaters, furnaces or boilers

Furnaces – With exhaust gas treatment means – Afterburning means
Patent

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Modified bubble inturn mask periphery

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

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Profile ID: LFUS-PAI-P-1573

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