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3641297
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Patent number 3,641,297
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Issue date Feb 8, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3531719
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Patent number 3,531,719
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Issue date Sep 29, 1970
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3431642
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Patent number 3,431,642
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Issue date Mar 11, 1969
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H01 - BASIC ELECTRIC ELEMENTS
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3419731
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Patent number 3,419,731
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Issue date Dec 31, 1968
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H03 - BASIC ELECTRONIC CIRCUITRY
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3193630
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Patent number 3,193,630
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Issue date Jul 6, 1965
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H03 - BASIC ELECTRONIC CIRCUITRY
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3192342
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Patent number 3,192,342
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Issue date Jun 29, 1965
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H01 - BASIC ELECTRIC ELEMENTS
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3086096
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Patent number 3,086,096
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Issue date Apr 16, 1963
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H01 - BASIC ELECTRIC ELEMENTS
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2972088
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Patent number 2,972,088
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Issue date Feb 14, 1961
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H01 - BASIC ELECTRIC ELEMENTS
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2936340
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Patent number 2,936,340
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Issue date May 10, 1960
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H01 - BASIC ELECTRIC ELEMENTS
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2929001
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Patent number 2,929,001
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Issue date Mar 15, 1960
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H01 - BASIC ELECTRIC ELEMENTS
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2879320
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Patent number 2,879,320
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Issue date Mar 24, 1959
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H01 - BASIC ELECTRIC ELEMENTS
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2824358
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Patent number 2,824,358
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Issue date Feb 25, 1958
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H01 - BASIC ELECTRIC ELEMENTS
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2820126
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Patent number 2,820,126
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Issue date Jan 14, 1958
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H01 - BASIC ELECTRIC ELEMENTS
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2802971
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Patent number 2,802,971
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Issue date Aug 13, 1957
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H01 - BASIC ELECTRIC ELEMENTS
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2800637
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Patent number 2,800,637
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Issue date Jul 23, 1957
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H01 - BASIC ELECTRIC ELEMENTS
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2767352
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Patent number 2,767,352
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Issue date Oct 16, 1956
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H01 - BASIC ELECTRIC ELEMENTS
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2753402
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Patent number 2,753,402
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Issue date Jul 3, 1956
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H01 - BASIC ELECTRIC ELEMENTS
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2740870
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Patent number 2,740,870
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Issue date Apr 3, 1956
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2667543
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Patent number 2,667,543
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Issue date Jan 26, 1954
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H01 - BASIC ELECTRIC ELEMENTS
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2591683
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Patent number 2,591,683
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Issue date Apr 8, 1952
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2582984
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Patent number 2,582,984
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Issue date Jan 22, 1952
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H01 - BASIC ELECTRIC ELEMENTS
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2525408
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Patent number 2,525,408
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Issue date Oct 10, 1950
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H01 - BASIC ELECTRIC ELEMENTS
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2502438
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Patent number 2,502,438
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H01 - BASIC ELECTRIC ELEMENTS
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2482997
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Patent number 2,482,997
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H01 - BASIC ELECTRIC ELEMENTS
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2435025
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Patent number 2,435,025
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Issue date Jan 27, 1948
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H01 - BASIC ELECTRIC ELEMENTS
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2417967
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Patent number 2,417,967
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H01 - BASIC ELECTRIC ELEMENTS
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2406002
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Patent number 2,406,002
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H01 - BASIC ELECTRIC ELEMENTS
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2318159
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Patent number 2,318,159
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H01 - BASIC ELECTRIC ELEMENTS
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2315720
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Patent number 2,315,720
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Issue date Apr 6, 1943
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H01 - BASIC ELECTRIC ELEMENTS
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2302039
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Patent number 2,302,039
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Issue date Nov 17, 1942
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H01 - BASIC ELECTRIC ELEMENTS