The patent of Ukraine: №95130 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00 Published: 11.07.2011, Bulletin №13/2011
Russian Federation Patent: №2412774 Author: Tkachenko Yuri Volodimirivich Section of the IPC: B21F 25/00 Published: 27.02.2011
Patent of Ukraine: №91445 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00 Published: 26.07.2010, Bulletin № 14/2010
Patent of Ukraine: №47937 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00, E04H 17/04 Published: 25.02.2010, Bulletin № 4
Patent of Ukraine: №47911 Author: Tkachenko Yuri Section of the IPC: B21F 25/00, E04H 17/04 Published: 25.02.2010, Bulletin № 4/2010