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3729819
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Patent number 3,729,819
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Issue date May 1, 1973
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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3703603
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Patent number 3,703,603
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Issue date Nov 21, 1972
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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3266661
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Patent number 3,266,661
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Issue date Aug 16, 1966
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H01 - BASIC ELECTRIC ELEMENTS
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3240647
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Patent number 3,240,647
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Issue date Mar 15, 1966
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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3006795
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Patent number 3,006,795
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Issue date Oct 31, 1961
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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2961746
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Patent number 2,961,746
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Issue date Nov 29, 1960
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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2711983
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Patent number 2,711,983
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Issue date Jun 28, 1955
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR