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Robert L. Copen
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Norton, OH, US
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last 30 patents
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Patent Grant
Apparatus for machining slots in apertures
Patent number
4,810,140
Issue date
Mar 7, 1989
Robert L. Copen
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Patent Grant
High temperature pressure vessel inspection procedure
Patent number
4,682,397
Issue date
Jul 28, 1987
The Babcock & Wilcox Company
George H. Harth
B08 - CLEANING