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3863707
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Patent number 3,863,707
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Issue date Feb 4, 1975
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G04 - HOROLOGY
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3772096
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Patent number 3,772,096
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Issue date Nov 13, 1973
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G04 - HOROLOGY
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3565770
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Patent number 3,565,770
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Issue date Feb 23, 1971
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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3562163
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Patent number 3,562,163
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Issue date Feb 9, 1971
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...