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                        Apparatus for bending corrugated pipe
                                - 
                                    Patent number 4,205,544
                                
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                                    Issue date Jun 3, 1980
                                
 
                                - 
                                         H. C. Price Co. H. C. Price Co.
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                                         Robert D. Foster Robert D. Foster
 
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                                         B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING... 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
                                
 
                                - 
                                         Abram Isaevich Galperin Abram Isaevich Galperin
 
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                                         B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        3861184
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        3831421
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        3438238
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        3247581
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        2371393
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        2219993
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1975045
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1958447
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1888891
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1875186
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1679893
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1617277
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1604489
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1587158
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1576337
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1573448
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1572559
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1564894
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1553817
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1533660
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1517678
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1479204
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
 
 
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                        1473756
                                - 
                                    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... B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...