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Self-guiding punch and die set
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Patent number 6,311,597
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Issue date Nov 6, 2001
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Humdinger, Inc.
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Michael Schroth
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3695134
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Patent number 3,695,134
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Issue date Oct 3, 1972
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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2788069
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Patent number 2,788,069
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Issue date Apr 9, 1957
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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2611757
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Patent number 2,611,757
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Issue date Sep 23, 1952
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C14 - SKINS HIDES PELTS LEATHER
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2523961
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Patent number 2,523,961
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Issue date Sep 26, 1950
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2401302
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Patent number 2,401,302
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Issue date Jun 4, 1946
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B68 - SADDLERY UPHOLSTERY
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2366296
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Patent number 2,366,296
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Issue date Jan 2, 1945
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C14 - SKINS HIDES PELTS LEATHER
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2259320
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Patent number 2,259,320
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Issue date Oct 14, 1941
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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2237449
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Patent number 2,237,449
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Issue date Apr 8, 1941
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A43 - FOOTWEAR
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2121004
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Patent number 2,121,004
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Issue date Jun 21, 1938
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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2053313
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Patent number 2,053,313
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Issue date Sep 8, 1936
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C14 - SKINS HIDES PELTS LEATHER
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1699247
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Patent number 1,699,247
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Issue date Jan 15, 1929
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C14 - SKINS HIDES PELTS LEATHER
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1619482
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Patent number 1,619,482
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Issue date Mar 1, 1927
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C14 - SKINS HIDES PELTS LEATHER
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1423630
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Patent number 1,423,630
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Issue date Jul 25, 1922
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A43 - FOOTWEAR
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1129131
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Patent number 1,129,131
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Issue date Feb 23, 1915
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C14 - SKINS HIDES PELTS LEATHER
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1124928
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Patent number 1,124,928
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Issue date Jan 12, 1915
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A43 - FOOTWEAR
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1016983
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Patent number 1,016,983
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Issue date Feb 13, 1912
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C14 - SKINS HIDES PELTS LEATHER
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149541
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Patent number 149,541
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Issue date Apr 7, 1874
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C14 - SKINS HIDES PELTS LEATHER
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17455
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Patent number 17,455
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Issue date Jun 2, 1857
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C14 - SKINS HIDES PELTS LEATHER