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1841097
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Issue date Jan 12, 1932
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H01 - BASIC ELECTRIC ELEMENTS
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1808925
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H01 - BASIC ELECTRIC ELEMENTS
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1780953
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Patent number 1,780,953
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Issue date Nov 11, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1763884
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Patent number 1,763,884
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Issue date Jun 17, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1762968
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Patent number 1,762,968
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Issue date Jun 10, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1756274
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Patent number 1,756,274
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Issue date Apr 29, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1756319
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Patent number 1,756,319
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Issue date Apr 29, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1756341
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Patent number 1,756,341
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Issue date Apr 29, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1756314
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Patent number 1,756,314
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Issue date Apr 29, 1930
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H01 - BASIC ELECTRIC ELEMENTS
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1727550
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Patent number 1,727,550
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H01 - BASIC ELECTRIC ELEMENTS
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1719479
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H01 - BASIC ELECTRIC ELEMENTS
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1690201
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H01 - BASIC ELECTRIC ELEMENTS
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H01 - BASIC ELECTRIC ELEMENTS
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1635443
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H01 - BASIC ELECTRIC ELEMENTS
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1625983
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H01 - BASIC ELECTRIC ELEMENTS
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1586888
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H01 - BASIC ELECTRIC ELEMENTS
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1586887
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H01 - BASIC ELECTRIC ELEMENTS
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H01 - BASIC ELECTRIC ELEMENTS
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1526572
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H01 - BASIC ELECTRIC ELEMENTS
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227082
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H01 - BASIC ELECTRIC ELEMENTS