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2727027
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2667475
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Patent number 2,667,475
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Issue date Jan 26, 1954
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2535684
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Patent number 2,535,684
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2236921
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Patent number 2,236,921
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Issue date Apr 1, 1941
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2197795
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Patent number 2,197,795
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Issue date Apr 23, 1940
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2186694
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Patent number 2,186,694
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Issue date Jan 9, 1940
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2180262
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Patent number 2,180,262
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Issue date Nov 14, 1939
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2172717
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Patent number 2,172,717
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2166133
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Patent number 2,166,133
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Issue date Jul 18, 1939
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2137927
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Patent number 2,137,927
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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2046795
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Patent number 2,046,795
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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1921398
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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967737
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Patent number 967,737
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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926999
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Patent number 926,999
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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161224
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE