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3168259
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Patent number 3,168,259
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Issue date Feb 2, 1965
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1655180
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Patent number 1,655,180
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Issue date Jan 3, 1928
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1605281
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Patent number 1,605,281
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Issue date Nov 2, 1926
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1530026
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Patent number 1,530,026
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Issue date Mar 17, 1925
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1507871
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Patent number 1,507,871
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Issue date Sep 9, 1924
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1475435
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Patent number 1,475,435
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Issue date Nov 27, 1923
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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386530
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Patent number 386,530
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Issue date Jul 24, 1888
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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366384
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Patent number 366,384
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Issue date Jul 12, 1887
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...