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3867667
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Patent number 3,867,667
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Issue date Feb 18, 1975
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3777200
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Patent number 3,777,200
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Issue date Dec 4, 1973
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G01 - MEASURING TESTING
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3588581
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Patent number 3,588,581
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1872322
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Patent number 1,872,322
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Issue date Aug 16, 1932
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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1007435
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Patent number 1,007,435
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Issue date Oct 31, 1911
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968949
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Patent number 968,949
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Issue date Aug 30, 1910
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963736
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Patent number 963,736
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Issue date Jul 12, 1910
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959133
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Patent number 959,133
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Issue date May 24, 1910
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903383
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Patent number 903,383
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Issue date Nov 10, 1908
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655808
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Patent number 655,808
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Issue date Aug 14, 1900
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593899
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Patent number 593,899
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Issue date Nov 16, 1897
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567840
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Patent number 567,840
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Issue date Sep 15, 1896
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422446
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Patent number 422,446
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Issue date Mar 4, 1890
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407915
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Patent number 407,915
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Issue date Jul 30, 1889
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267691
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Patent number 267,691
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Issue date Nov 21, 1882
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241112
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Patent number 241,112
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Issue date May 3, 1881
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