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John C. Blackwood
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Melrose, MA, US
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last 30 patents
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Patent Grant
Metal fastener sticks and process of preparing same by curing polym...
Patent number
4,018,333
Issue date
Apr 19, 1977
Stepan Chemical Company
John C. Blackwood
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...