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3579051
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Patent number 3,579,051
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Issue date May 18, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3543101
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Patent number 3,543,101
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Issue date Nov 24, 1970
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H01 - BASIC ELECTRIC ELEMENTS
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3524111
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Patent number 3,524,111
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Issue date Aug 11, 1970
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H03 - BASIC ELECTRONIC CIRCUITRY
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3182229
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Patent number 3,182,229
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Issue date May 4, 1965
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H03 - BASIC ELECTRONIC CIRCUITRY
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3116440
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Patent number 3,116,440
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Issue date Dec 31, 1963
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H01 - BASIC ELECTRIC ELEMENTS
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2978614
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Patent number 2,978,614
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Issue date Apr 4, 1961
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H01 - BASIC ELECTRIC ELEMENTS
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2939068
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Patent number 2,939,068
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Issue date May 31, 1960
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2937321
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Patent number 2,937,321
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Issue date May 17, 1960
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H01 - BASIC ELECTRIC ELEMENTS
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2894180
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Patent number 2,894,180
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G05 - CONTROLLING REGULATING
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2854591
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Patent number 2,854,591
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H01 - BASIC ELECTRIC ELEMENTS
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2849662
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Patent number 2,849,662
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2468634
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2265039
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2059057
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Patent number 2,059,057
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H01 - BASIC ELECTRIC ELEMENTS
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1921786
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H03 - BASIC ELECTRONIC CIRCUITRY
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1808712
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H01 - BASIC ELECTRIC ELEMENTS