Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7360798 | Threaded joint for steel pipes | Keishi Matsumoto, Kunio Goto, Shigeo Nagasaku, Hideo Yamamoto | 2008-04-22 |
| 7165431 | Cr-plated mandrel bar for manufacturing hot seamless tube and method of manufacturing the same | Sumio Iida, Masami Imamura, Hirofumi Hori | 2007-01-23 |
| 6988387 | Making method for seamless metallic tube | Hirotsugu Nakaike, Kazuhiro Shimoda, Tomio Yamakawa | 2006-01-24 |
| 6746057 | Threaded joint for steel pipes having improved galling resistance and rust-preventing properties | Kunio Goto | 2004-06-08 |
| 6659509 | Threaded joint for steel pipes | Kunio Goto, Keishi Matsumoto, Kazuyuki Nakasuji, Shigeo Nagasaku | 2003-12-09 |
| 6458318 | Heat resistant nickel base alloy | Yoshitaka Nishiyama, Yoshiatsu Sawaragi, Kazuhiro Ogawa, Hirokazu Okada | 2002-10-01 |
| 6440234 | Martensitic stainless steel products | Hisashi Amaya, Yasuyoshi Hidaka | 2002-08-27 |
| 6210806 | Martensitic stainless steel having oxide scale layers | Yasuyoshi Hidaka, Hisashi Amaya | 2001-04-03 |
| 5824264 | High-temperature stainless steel and method for its production | Hideki Uno, Yoshitaka Nishiyama, Yoshiatsu Sawaragi, Nobuo Otsuka, Kazuhiro Ogawa | 1998-10-20 |
| 5660211 | Galvanic corrosion resistant insulating pipe having excellent film adhesion | Nobuhiko Hiraide, Masakatsu Ueda | 1997-08-26 |