4. Surgery
  5. Respiratory method or device
  6. Means for supplying respiratory gas under positive pressure

Trevor Constance-Hughes

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Breathing apparatus

Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent

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Breathing apparatus

Surgery – Respiratory method or device – Gas produced by electrolysis or chemical reaction
Patent

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Breathing apparatus and facemasks therefor

Surgery – Respiratory method or device – Means for keeping viewing member clear
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Profile ID: LFUS-PAI-P-489311

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