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Chromate coating of zinc surfaces
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Patent number 4,749,418
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Issue date Jun 7, 1988
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Nihon Parkerizing Co., Ltd.
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Kenshi Saeki
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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3735484
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Patent number 3,735,484
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Issue date May 29, 1973
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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3676223
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Patent number 3,676,223
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Issue date Jul 11, 1972
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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3477882
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Patent number 3,477,882
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Issue date Nov 11, 1969
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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3382111
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Patent number 3,382,111
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Issue date May 7, 1968
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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3377212
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Patent number 3,377,212
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Issue date Apr 9, 1968
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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2936254
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Patent number 2,936,254
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Issue date May 10, 1960
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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2928763
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Patent number 2,928,763
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Issue date Mar 15, 1960
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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2909455
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Patent number 2,909,455
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Issue date Oct 20, 1959
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...