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John F. Harper Jr.
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Glastonbury, CT, US
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last 30 patents
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Patent Grant
Orbital barrel finishing machine and automated system therefor
Patent number
4,718,199
Issue date
Jan 12, 1988
John F. Harper
B24 - GRINDING POLISHING
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Patent Grant
Orbital barrel finishing machine and automated system therefor
Patent number
4,615,148
Issue date
Oct 7, 1986
John F. Harper
B24 - GRINDING POLISHING