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Cutting tool
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Patent number 4,893,972
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Issue date Jan 16, 1990
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Pittsburgh Tube Company
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Lester J. Blaho
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3680441
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Patent number 3,680,441
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Issue date Aug 1, 1972
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3250181
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Patent number 3,250,181
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Issue date May 10, 1966
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2545435
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Patent number 2,545,435
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Issue date Mar 13, 1951
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B24 - GRINDING POLISHING
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2074257
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Patent number 2,074,257
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Issue date Mar 16, 1937
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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1937985
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Patent number 1,937,985
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Issue date Dec 5, 1933
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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42797
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Patent number 42,797
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Issue date May 17, 1864
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR