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3924625
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Patent number 3,924,625
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Issue date Dec 9, 1975
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3774608
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Patent number 3,774,608
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Issue date Nov 27, 1973
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3419009
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Patent number 3,419,009
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Issue date Dec 31, 1968
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2853075
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Patent number 2,853,075
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Issue date Sep 23, 1958
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2799274
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Patent number 2,799,274
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Issue date Jul 16, 1957
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2751912
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Patent number 2,751,912
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Issue date Jun 26, 1956
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2424767
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Patent number 2,424,767
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Issue date Jul 29, 1947
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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1902418
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Patent number 1,902,418
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Issue date Mar 21, 1933
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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1735287
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Patent number 1,735,287
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Issue date Nov 12, 1929
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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1667325
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Patent number 1,667,325
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Issue date Apr 24, 1928
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE