Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10326281 | Power conditioner, photovoltaic power generation device, and control method | — | 2019-06-18 |
| 8768321 | Communication system, radio communication terminal and display control method | — | 2014-07-01 |
| 7591914 | High-workability steel pipe and method of producing same | Takaaki Toyooka, Yoshikazu Kawabata, Akira Yorifuji, Motoaki Itadani, Takatoshi Okabe +1 more | 2009-09-22 |
| 7018488 | Steel pipe for use in reinforcement of automobile and method for production thereof | Takaaki Toyooka, Yoshikazu Kawabata, Akira Yorifuji, Motoaki Itadani, Takatoshi Okabe +1 more | 2006-03-28 |
| 6736910 | High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same | Takaaki Toyooka, Yoshikazu Kawabata, Akira Yorifuji, Motoaki Itadani, Takatoshi Okabe +2 more | 2004-05-18 |
| 6375059 | Method for smoothing steel pipe seam portion | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2002-04-23 |
| 6331216 | Steel pipe having high ductility and high strength and process for production thereof | Takaaki Toyooka, Akira Yorifuji, Motoaki Itadani, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-12-18 |
| 6290789 | Ultrafine-grain steel pipe and process for manufacturing the same | Takaaki Toyooka, Akira Yorifuji, Motoaki Itadani, Yuji Hashimoto, Takatoshi Okabe +6 more | 2001-09-18 |
| 6216511 | Apparatus and method for smoothing a welded seam of steel pipe | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2001-04-17 |