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3846167
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Patent number 3,846,167
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Issue date Nov 5, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3810796
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Patent number 3,810,796
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Issue date May 14, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3774088
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Patent number 3,774,088
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Issue date Nov 20, 1973
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G01 - MEASURING TESTING
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3725148
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Patent number 3,725,148
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Issue date Apr 3, 1973
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H01 - BASIC ELECTRIC ELEMENTS
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3676229
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Patent number 3,676,229
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Issue date Jul 11, 1972
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G01 - MEASURING TESTING
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3674995
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Patent number 3,674,995
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Issue date Jul 4, 1972
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G01 - MEASURING TESTING
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3666573
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Patent number 3,666,573
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Issue date May 30, 1972
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G01 - MEASURING TESTING
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3647581
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Patent number 3,647,581
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Issue date Mar 7, 1972
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H01 - BASIC ELECTRIC ELEMENTS