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3665236
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Patent number 3,665,236
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Issue date May 23, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3660712
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Patent number 3,660,712
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H01 - BASIC ELECTRIC ELEMENTS
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2517384
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Patent number 2,517,384
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H01 - BASIC ELECTRIC ELEMENTS
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2402029
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Patent number 2,402,029
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Issue date Jun 11, 1946
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H01 - BASIC ELECTRIC ELEMENTS
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2380502
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Patent number 2,380,502
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Issue date Jul 31, 1945
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H01 - BASIC ELECTRIC ELEMENTS
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2329319
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Patent number 2,329,319
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H01 - BASIC ELECTRIC ELEMENTS
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2212578
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Patent number 2,212,578
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Issue date Aug 27, 1940
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H01 - BASIC ELECTRIC ELEMENTS
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2212929
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Patent number 2,212,929
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Issue date Aug 27, 1940
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H01 - BASIC ELECTRIC ELEMENTS
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2164477
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Patent number 2,164,477
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Issue date Jul 4, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2165135
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Patent number 2,165,135
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Issue date Jul 4, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2105472
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Patent number 2,105,472
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Issue date Jan 18, 1938
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H01 - BASIC ELECTRIC ELEMENTS
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2099531
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Patent number 2,099,531
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Issue date Nov 16, 1937
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H01 - BASIC ELECTRIC ELEMENTS
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1980805
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Patent number 1,980,805
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H01 - BASIC ELECTRIC ELEMENTS
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1976553
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Patent number 1,976,553
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Issue date Oct 9, 1934
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H01 - BASIC ELECTRIC ELEMENTS
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1973094
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Patent number 1,973,094
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Issue date Sep 11, 1934
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H01 - BASIC ELECTRIC ELEMENTS
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1949396
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Patent number 1,949,396
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Issue date Feb 27, 1934
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H01 - BASIC ELECTRIC ELEMENTS
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1949397
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Patent number 1,949,397
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Issue date Feb 27, 1934
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H01 - BASIC ELECTRIC ELEMENTS
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1944190
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Patent number 1,944,190
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H01 - BASIC ELECTRIC ELEMENTS
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1874355
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H01 - BASIC ELECTRIC ELEMENTS
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1859677
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H01 - BASIC ELECTRIC ELEMENTS
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1809304
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H01 - BASIC ELECTRIC ELEMENTS
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1765605
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H01 - BASIC ELECTRIC ELEMENTS
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1709029
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H01 - BASIC ELECTRIC ELEMENTS
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1565600
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H01 - BASIC ELECTRIC ELEMENTS