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John L. Young Sr.
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Perrysburg, OH, US
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last 30 patents
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Patent Grant
Hold down roll assembly for aligning longitudinal tubular edges in...
Patent number
4,197,729
Issue date
Apr 15, 1980
Abbey Etna Machine Company, Inc.
John L. Young
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...