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Apparatus for bending corrugated pipe
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Patent number 4,205,544
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Issue date Jun 3, 1980
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H. C. Price Co.
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Robert D. Foster
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Device for bending thin-walled pipes
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Patent number 4,007,622
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Issue date Feb 15, 1977
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Abram Isaevich Galperin
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3861184
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Patent number 3,861,184
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Issue date Jan 21, 1975
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3831421
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Patent number 3,831,421
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Issue date Aug 27, 1974
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3438238
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Patent number 3,438,238
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Issue date Apr 15, 1969
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3247581
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Patent number 3,247,581
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Issue date Apr 26, 1966
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2371393
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Patent number 2,371,393
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Issue date Mar 13, 1945
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2219993
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Patent number 2,219,993
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Issue date Oct 29, 1940
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1975045
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Patent number 1,975,045
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Issue date Sep 25, 1934
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1958447
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Patent number 1,958,447
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Issue date May 15, 1934
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1888891
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Patent number 1,888,891
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Issue date Nov 22, 1932
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1875186
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Patent number 1,875,186
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Issue date Aug 30, 1932
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1679893
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Patent number 1,679,893
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Issue date Aug 7, 1928
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1617277
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Patent number 1,617,277
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Issue date Feb 8, 1927
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1604489
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Patent number 1,604,489
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Issue date Oct 26, 1926
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1587158
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Patent number 1,587,158
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Issue date Jun 1, 1926
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1576337
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Patent number 1,576,337
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Issue date Mar 9, 1926
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1573448
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Patent number 1,573,448
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Issue date Feb 16, 1926
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1572559
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Patent number 1,572,559
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Issue date Feb 9, 1926
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1564894
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Patent number 1,564,894
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Issue date Dec 8, 1925
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1553817
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Patent number 1,553,817
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Issue date Sep 15, 1925
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1533660
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Patent number 1,533,660
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Issue date Apr 14, 1925
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1517678
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Patent number 1,517,678
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Issue date Dec 2, 1924
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1479204
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Patent number 1,479,204
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Issue date Jan 1, 1924
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1473756
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Patent number 1,473,756
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Issue date Nov 13, 1923
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...