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2187114
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Patent number 2,187,114
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Issue date Jan 16, 1940
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H01 - BASIC ELECTRIC ELEMENTS
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1595204
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Patent number 1,595,204
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Issue date Aug 10, 1926
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H01 - BASIC ELECTRIC ELEMENTS
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1568755
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Patent number 1,568,755
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Issue date Jan 5, 1926
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H01 - BASIC ELECTRIC ELEMENTS
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1556942
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Patent number 1,556,942
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Issue date Oct 13, 1925
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H01 - BASIC ELECTRIC ELEMENTS
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1547508
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Patent number 1,547,508
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Issue date Jul 28, 1925
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H01 - BASIC ELECTRIC ELEMENTS
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1544846
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Patent number 1,544,846
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Issue date Jul 7, 1925
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H01 - BASIC ELECTRIC ELEMENTS
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1523380
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Patent number 1,523,380
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Issue date Jan 13, 1925
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H01 - BASIC ELECTRIC ELEMENTS
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1523381
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Patent number 1,523,381
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Issue date Jan 13, 1925
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H01 - BASIC ELECTRIC ELEMENTS
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1516539
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Patent number 1,516,539
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Issue date Nov 25, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1514625
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Patent number 1,514,625
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Issue date Nov 11, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1501909
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Patent number 1,501,909
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Issue date Jul 22, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1501908
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Patent number 1,501,908
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Issue date Jul 22, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1495755
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Patent number 1,495,755
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Issue date May 27, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1491154
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Patent number 1,491,154
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Issue date Apr 22, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1488690
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Patent number 1,488,690
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Issue date Apr 1, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1489082
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Patent number 1,489,082
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Issue date Apr 1, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1487870
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Patent number 1,487,870
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Issue date Mar 25, 1924
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H01 - BASIC ELECTRIC ELEMENTS
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1475500
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Patent number 1,475,500
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Issue date Nov 27, 1923
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H01 - BASIC ELECTRIC ELEMENTS
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1475499
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Patent number 1,475,499
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Issue date Nov 27, 1923
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H01 - BASIC ELECTRIC ELEMENTS
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1475501
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Patent number 1,475,501
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Issue date Nov 27, 1923
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H01 - BASIC ELECTRIC ELEMENTS
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1439427
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Patent number 1,439,427
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Issue date Dec 19, 1922
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H01 - BASIC ELECTRIC ELEMENTS
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1247669
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Patent number 1,247,669
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Issue date Nov 27, 1917
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H01 - BASIC ELECTRIC ELEMENTS
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1237214
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Patent number 1,237,214
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Issue date Aug 14, 1917
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H01 - BASIC ELECTRIC ELEMENTS
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1210604
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Patent number 1,210,604
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Issue date Jan 2, 1917
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H01 - BASIC ELECTRIC ELEMENTS
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1197185
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Patent number 1,197,185
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Issue date Sep 5, 1916
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H01 - BASIC ELECTRIC ELEMENTS
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1173772
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Patent number 1,173,772
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Issue date Feb 29, 1916
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H01 - BASIC ELECTRIC ELEMENTS
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1164271
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Patent number 1,164,271
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Issue date Dec 14, 1915
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H01 - BASIC ELECTRIC ELEMENTS
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1156416
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Patent number 1,156,416
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Issue date Oct 12, 1915
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H01 - BASIC ELECTRIC ELEMENTS
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1124314
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Patent number 1,124,314
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Issue date Jan 12, 1915
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H01 - BASIC ELECTRIC ELEMENTS
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1123340
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Patent number 1,123,340
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Issue date Jan 5, 1915
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H01 - BASIC ELECTRIC ELEMENTS