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Piercing die
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Patent number 4,802,393
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Issue date Feb 7, 1989
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Ecological Systems, Inc.
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Henry Gruchalski
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Apparatus for cutting cans
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Patent number 4,165,664
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Issue date Aug 28, 1979
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Richard E. DeYoung
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3780435
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Patent number 3,780,435
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Issue date Dec 25, 1973
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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3710663
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Patent number 3,710,663
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Issue date Jan 16, 1973
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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3489045
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Patent number 3,489,045
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Issue date Jan 13, 1970
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3430528
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Patent number 3,430,528
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Issue date Mar 4, 1969
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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3368255
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Patent number 3,368,255
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Issue date Feb 13, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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3289511
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Patent number 3,289,511
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Issue date Dec 6, 1966
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3288010
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Patent number 3,288,010
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Issue date Nov 29, 1966
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3111873
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Patent number 3,111,873
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Issue date Nov 26, 1963
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3100413
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Patent number 3,100,413
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Issue date Aug 13, 1963
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2783840
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Patent number 2,783,840
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Issue date Mar 5, 1957
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2412930
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Patent number 2,412,930
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Issue date Dec 17, 1946
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2404901
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Patent number 2,404,901
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Issue date Jul 30, 1946
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2397048
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Patent number 2,397,048
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Issue date Mar 19, 1946
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2335720
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Patent number 2,335,720
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Issue date Nov 30, 1943
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2323546
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Patent number 2,323,546
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Issue date Jul 6, 1943
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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1758192
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Patent number 1,758,192
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Issue date May 13, 1930
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A63 - SPORTS GAMES AMUSEMENTS
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1489716
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Patent number 1,489,716
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Issue date Apr 8, 1924
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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877855
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Patent number 877,855
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Issue date Jan 28, 1908
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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771752
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Patent number 771,752
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Issue date Oct 4, 1904
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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690906
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Patent number 690,906
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Issue date Jan 7, 1902
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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464307
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Patent number 464,307
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Issue date Dec 1, 1891
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...