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Grinding device
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Patent number 4,744,178
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Issue date May 17, 1988
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Institute for Industrial Research & Standards
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Mohammad Afshar
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B24 - GRINDING POLISHING
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Drill bit sharpener
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Patent number 4,520,599
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Issue date Jun 4, 1985
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Albert Slinsky
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B24 - GRINDING POLISHING
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3599302
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Patent number 3,599,302
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Issue date Aug 17, 1971
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B24 - GRINDING POLISHING
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3594961
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Patent number 3,594,961
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Issue date Jul 27, 1971
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B24 - GRINDING POLISHING
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3456392
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Patent number 3,456,392
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Issue date Jul 22, 1969
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B24 - GRINDING POLISHING
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3400499
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Patent number 3,400,499
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Issue date Sep 10, 1968
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B24 - GRINDING POLISHING
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3167887
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Patent number 3,167,887
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Issue date Feb 2, 1965
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B24 - GRINDING POLISHING
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3084485
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Patent number 3,084,485
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Issue date Apr 9, 1963
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B24 - GRINDING POLISHING
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3057122
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Patent number 3,057,122
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Issue date Oct 9, 1962
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B24 - GRINDING POLISHING
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2970407
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Patent number 2,970,407
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Issue date Feb 7, 1961
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B24 - GRINDING POLISHING
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2911771
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Patent number 2,911,771
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Issue date Nov 10, 1959
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B24 - GRINDING POLISHING
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2874520
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Patent number 2,874,520
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Issue date Feb 24, 1959
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B24 - GRINDING POLISHING
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2872758
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Patent number 2,872,758
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Issue date Feb 10, 1959
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B24 - GRINDING POLISHING
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2797533
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Patent number 2,797,533
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Issue date Jul 2, 1957
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B24 - GRINDING POLISHING
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2795085
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Patent number 2,795,085
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Issue date Jun 11, 1957
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B24 - GRINDING POLISHING