Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8082768 | Piercing and rolling plug, method of regenerating such piercing and rolling plug, and equipment line for regenerating such piercing and rolling plug | Yasuyoshi Hidaka, Kouji Nakaike, Naoya Hirase, Yasuto Higashida, Takateru Inage +5 more | 2011-12-27 |
| 8037732 | Method of producing seamless metal tube and punch for use therein | Tomio Yamakawa, Koji Muramatsu, Yuji Inoue | 2011-10-18 |
| 8020421 | Pusher device for piercing and rolling and method of manufacturing seamless pipe or tube using the same | Tomio Yamakawa | 2011-09-20 |
| 7866199 | Method for manufacturing seamless steel pipe made of high Cr-high Ni alloy steel | Naoya Hirase, Tomio Yamakawa | 2011-01-11 |