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3909624
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Patent number 3,909,624
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Issue date Sep 30, 1975
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H03 - BASIC ELECTRONIC CIRCUITRY
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3867663
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Patent number 3,867,663
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Issue date Feb 18, 1975
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H01 - BASIC ELECTRIC ELEMENTS
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3581148
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Patent number 3,581,148
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Issue date May 25, 1971
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H01 - BASIC ELECTRIC ELEMENTS
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2508954
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Patent number 2,508,954
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Issue date May 23, 1950
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G01 - MEASURING TESTING
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2448576
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Patent number 2,448,576
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Issue date Sep 7, 1948
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H01 - BASIC ELECTRIC ELEMENTS
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2262505
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Patent number 2,262,505
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Issue date Nov 11, 1941
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2228846
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Patent number 2,228,846
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Issue date Jan 14, 1941
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H01 - BASIC ELECTRIC ELEMENTS
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2177500
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Patent number 2,177,500
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Issue date Oct 24, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2151567
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Patent number 2,151,567
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Issue date Mar 21, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2128884
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Patent number 2,128,884
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Issue date Aug 30, 1938
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H01 - BASIC ELECTRIC ELEMENTS
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2074930
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Patent number 2,074,930
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Issue date Mar 23, 1937
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H01 - BASIC ELECTRIC ELEMENTS
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2031435
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Patent number 2,031,435
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Issue date Feb 18, 1936
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H01 - BASIC ELECTRIC ELEMENTS
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1733679
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Patent number 1,733,679
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Issue date Oct 29, 1929
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H01 - BASIC ELECTRIC ELEMENTS
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1668615
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Patent number 1,668,615
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H01 - BASIC ELECTRIC ELEMENTS
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1607075
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Patent number 1,607,075
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Issue date Nov 16, 1926
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H01 - BASIC ELECTRIC ELEMENTS
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1333731
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Patent number 1,333,731
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Issue date Mar 16, 1920
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F42 - AMMUNITION BLASTING