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

John J. Kern

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Apparatus for manufacturing a respirator cartridge seal

Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to cause relative movement between mold and charger
Patent

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Disposable face mask

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

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Method of manufacturing a respirator cartridge seal

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Reexamination Certificate

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Profile ID: LFUS-PAI-P-359591

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