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Zeroing circuit
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Patent number 4,042,885
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Issue date Aug 16, 1977
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Sun Oil Company
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Charles F. Rhodes
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G01 - MEASURING TESTING
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Zeroing circuit
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Patent number 3,937,062
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Issue date Feb 10, 1976
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Sun Oil Company (Delaware)
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Charles F. Rhodes
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G01 - MEASURING TESTING
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3898837
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Patent number 3,898,837
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Issue date Aug 12, 1975
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G01 - MEASURING TESTING
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3551839
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Patent number 3,551,839
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Issue date Dec 29, 1970
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G01 - MEASURING TESTING
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3121160
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Patent number 3,121,160
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Issue date Feb 11, 1964
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G01 - MEASURING TESTING
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3095728
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Patent number 3,095,728
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Issue date Jul 2, 1963
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G01 - MEASURING TESTING
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3068685
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Patent number 3,068,685
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Issue date Dec 18, 1962
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G01 - MEASURING TESTING