Patent Kazakhstan: №23426 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00 Published: 17.10.2011, Bulletin №10
Patent Kazakhstan: №23426 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00, E04H 17/04 Published: 15.12.2010, Bulletin № 12
Patent of Kazakhstan: №23427 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00, E04H 17/04 Published: 15.12.2010 bulletin №12
Patent of Kazakhstan: №23425 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00 Published: 15.12.2010 Bulletin №12
Kazakhstan Patent: №22995 Author: Tkachenko Yuriy Vladimirovich Section of the IPC: B21F 25/00 Published: 15.10.2010, Bulletin №10