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Demand valve for gas mixing
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Patent number 8,443,826
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Issue date May 21, 2013
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Concept 2 Manufacture Design OCD Ltd.
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Andrew Tatarek
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Demand valve for a respirator
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Patent number 5,042,473
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Issue date Aug 27, 1991
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Pro-Tech Respirators, Inc.
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Ralph D. Lewis
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Respirator control device
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Patent number 4,630,605
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Issue date Dec 23, 1986
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Dragerwerk AG
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Adalbert Pasternack
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A62 - LIFE-SAVING FIRE-FIGHTING
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Breathing apparatus
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Patent number 4,437,460
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Issue date Mar 20, 1984
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Sabre Safety Limited
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Michael H. Glynn
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A62 - LIFE-SAVING FIRE-FIGHTING
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Valves
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Patent number 4,337,766
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Issue date Jul 6, 1982
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Chubb Panorama Limited
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Leonard J. Feathers
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Demand regulator
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Patent number 3,978,854
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Issue date Sep 7, 1976
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Lif-O-Gen, Inc.
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Justin W. Mills
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A62 - LIFE-SAVING FIRE-FIGHTING
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3626974
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Patent number 3,626,974
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Issue date Dec 14, 1971
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A62 - LIFE-SAVING FIRE-FIGHTING
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3493011
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Patent number 3,493,011
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Issue date Feb 3, 1970
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3490487
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Patent number 3,490,487
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Issue date Jan 20, 1970
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3483887
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Patent number 3,483,887
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Issue date Dec 16, 1969
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A62 - LIFE-SAVING FIRE-FIGHTING
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3467137
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Patent number 3,467,137
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Issue date Sep 16, 1969
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3457953
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Patent number 3,457,953
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A62 - LIFE-SAVING FIRE-FIGHTING
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3357447
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A62 - LIFE-SAVING FIRE-FIGHTING
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3249107
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A62 - LIFE-SAVING FIRE-FIGHTING
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3232303
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Patent number 3,232,303
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A62 - LIFE-SAVING FIRE-FIGHTING
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3224444
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Patent number 3,224,444
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Issue date Dec 21, 1965
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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3145721
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Patent number 3,145,721
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Issue date Aug 25, 1964
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A62 - LIFE-SAVING FIRE-FIGHTING