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Spiral flute tap
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Patent number 7,950,880
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Issue date May 31, 2011
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Kennametal Inc.
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Willard E. Henderer
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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-
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Coated carbide tap
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Patent number 7,147,939
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Issue date Dec 12, 2006
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Kennametal Inc.
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Willard E. Henderer
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Threading tap
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Patent number 5,487,626
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Issue date Jan 30, 1996
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Sandvik AB
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Peder Von Holst
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Threading tap
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Patent number 4,708,542
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Issue date Nov 24, 1987
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Greenfield Industries, Inc.
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Dino J. Emanuelli
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR