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3588581
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2229227
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Patent number 2,229,227
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2004680
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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1952810
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1920921
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Patent number 1,920,921
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1867524
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Patent number 1,867,524
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Issue date Jul 12, 1932
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1862422
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Patent number 1,862,422
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1838741
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Patent number 1,838,741
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1774964
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Patent number 1,774,964
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Issue date Sep 2, 1930
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1774965
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Patent number 1,774,965
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Issue date Sep 2, 1930
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Patent number 1,775,078
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1722146
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Patent number 1,722,146
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1682847
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Patent number 1,682,847
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1669129
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Patent number 1,669,129
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1632161
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Patent number 1,632,161
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Patent number 1,626,104
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Patent number 1,604,544
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Patent number 1,439,016
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Patent number 1,334,820
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Patent number 1,328,311
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