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2004772
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Patent number 2,004,772
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Issue date Jun 11, 1935
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H01 - BASIC ELECTRIC ELEMENTS
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1988345
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Patent number 1,988,345
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Issue date Jan 15, 1935
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G01 - MEASURING TESTING
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1976843
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Patent number 1,976,843
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Issue date Oct 16, 1934
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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1939286
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Patent number 1,939,286
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Issue date Dec 12, 1933
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H01 - BASIC ELECTRIC ELEMENTS
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1919052
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Patent number 1,919,052
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Issue date Jul 18, 1933
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H01 - BASIC ELECTRIC ELEMENTS
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1900647
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Patent number 1,900,647
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Issue date Mar 7, 1933
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H01 - BASIC ELECTRIC ELEMENTS
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1874182
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Patent number 1,874,182
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Issue date Aug 30, 1932
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H01 - BASIC ELECTRIC ELEMENTS
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1862373
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Patent number 1,862,373
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Issue date Jun 7, 1932
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1855959
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Patent number 1,855,959
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Issue date Apr 26, 1932
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H01 - BASIC ELECTRIC ELEMENTS
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1848171
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Patent number 1,848,171
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Issue date Mar 8, 1932
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B61 - RAILWAYS
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1797886
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Patent number 1,797,886
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H01 - BASIC ELECTRIC ELEMENTS
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1789608
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Patent number 1,789,608
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Issue date Jan 20, 1931
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H01 - BASIC ELECTRIC ELEMENTS
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1784450
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Patent number 1,784,450
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Issue date Dec 9, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1766965
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Patent number 1,766,965
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Issue date Jun 24, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1760382
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Patent number 1,760,382
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Issue date May 27, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1750495
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Patent number 1,750,495
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Issue date Mar 11, 1930
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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1749718
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Patent number 1,749,718
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Issue date Mar 4, 1930
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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1745856
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Patent number 1,745,856
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Issue date Feb 4, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1743073
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Patent number 1,743,073
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Issue date Jan 7, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1733085
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Patent number 1,733,085
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Issue date Oct 22, 1929
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H01 - BASIC ELECTRIC ELEMENTS
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1694569
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Patent number 1,694,569
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Issue date Dec 11, 1928
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H01 - BASIC ELECTRIC ELEMENTS
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1684709
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Patent number 1,684,709
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Issue date Sep 18, 1928
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H01 - BASIC ELECTRIC ELEMENTS
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1639888
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Patent number 1,639,888
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H01 - BASIC ELECTRIC ELEMENTS
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1622721
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Patent number 1,622,721
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Issue date Mar 29, 1927
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H01 - BASIC ELECTRIC ELEMENTS
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1620183
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Patent number 1,620,183
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Issue date Mar 8, 1927
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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1594304
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Patent number 1,594,304
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Issue date Jul 27, 1926
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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1538938
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Patent number 1,538,938
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Issue date May 26, 1925
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H01 - BASIC ELECTRIC ELEMENTS
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1520499
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Patent number 1,520,499
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Issue date Dec 23, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1515684
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Patent number 1,515,684
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Issue date Nov 18, 1924
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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1516195
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Patent number 1,516,195
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Issue date Nov 18, 1924
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H01 - BASIC ELECTRIC ELEMENTS