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Flat die thread roller
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Patent number 5,555,757
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Issue date Sep 17, 1996
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The National Machinery Company
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Gregory A. Smith
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Flat die thread roller
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Patent number 5,542,275
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Issue date Aug 6, 1996
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The National Machinery Company
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Gregory A. Smith
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Flat die thread roller
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Patent number 5,345,800
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Issue date Sep 13, 1994
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The National Machinery Company
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Gregory A. Smith
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Flat die thread roller
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Patent number 5,230,235
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Issue date Jul 27, 1993
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The National Machinery Company
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Gregory A. Smith
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Flat die thread roller
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Patent number 5,131,250
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Issue date Jul 21, 1992
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The National Machinery Company
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Gregory A. Smith
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Progressive former with removable tooling
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Patent number 4,631,950
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Issue date Dec 30, 1986
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The National Machinery Company
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Thomas E. Hay
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Forging machine transfer
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Patent number 4,398,408
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Issue date Aug 16, 1983
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The National Machinery Company
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Robert E. Wisebaker
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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High speed transfer
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Patent number 4,084,278
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Issue date Apr 18, 1978
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The National Machinery Company
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Gene E. Allebach
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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