Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6679526 | Threaded joint for an oil well pipe | Hideo Yamamoto | 2004-01-20 |
| 6659509 | Threaded joint for steel pipes | Kunio Goto, Keishi Matsumoto, Toshiro Anraku, Shigeo Nagasaku | 2003-12-09 |
| 5970611 | Method for processing a rotor used for a super charger | Shigeru Takabe, Kouichi Kuroda | 1999-10-26 |
| 5733667 | Plated nickel-titanium alloy product | Mitsuru Aiba, Masaki Takashima | 1998-03-31 |
| 5673584 | Method of and an apparatus for producing wire | Kouichi Kuroda, Itsushi Iio, Shigeharu Ochi | 1997-10-07 |
| 5533370 | Tube rolling method and apparatus | Kouichi Kuroda, Youichi Imamura, Chihiro Hayashi | 1996-07-09 |
| 5501834 | Nonmagnetic ferrous alloy with excellent corrosion resistance and workability | Masaki Takashima | 1996-03-26 |
| 5007577 | Multiple-core complex material and method of manufacturing the same | Chihiro Hayashi, Yoshiyuki Suzushima | 1991-04-16 |
| 5004143 | Method of manufacturing clad bar | Chihiro Hayashi | 1991-04-02 |
| 4959985 | Method of manufacturing metallic tube with spiral fin | Kouichi Kuroda, Chihiro Hayashi | 1990-10-02 |
| 4901553 | Method of manufacturing a finned tube | Kouichi Kuroda, Chihiro Hayashi | 1990-02-20 |
| 4512177 | Method of manufacturing metallic materials having a circular cross section | Chihiro Hayashi | 1985-04-23 |
| 4510787 | Method of manufacturing hollow rods | Chihiro Hayashi | 1985-04-16 |