Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834523 | Method for producing seamless tube with grooved inner surface | Nobuaki Hinago, Kiyonori Ozeki, Hideki IWAMOTO | 2004-12-28 |
| 6655451 | Heat transfer tube for falling film type evaporator | Yoshio Tada, Hiroyuki Takahashi | 2003-12-02 |
| 6336501 | Tube having grooved inner surface and its production method | Mamoru Ishikawa, Kiyonori Ozeki, Nobuaki Hinago | 2002-01-08 |
| 6176302 | Boiling heat transfer tube | Hiroyuki Takahashi | 2001-01-23 |
| 6098420 | Absorption chiller and heat exchanger tube used the same | Masahiro Furukawa, Kazuyasu Iramina, Hiroyuki Takahashi | 2000-08-08 |
| 6056048 | Falling film type heat exchanger tube | Hiroyuki Takahashi | 2000-05-02 |
| 5960870 | Heat transfer tube for absorber | Hiroyuki Takahashi, Mamoru Ishikawa, Hiroyuki Kijima | 1999-10-05 |
| 5915467 | Heat transfer tube with grooves in inner surface of tube | Mamoru Ishikawa, Nobuaki Hinago, Kiyonori Ozeki | 1999-06-29 |
| 5724844 | Inner grooved tube forming apparatus | — | 1998-03-10 |
| 4876869 | Inner grooving process for a metallic tube | Minoru Nishibe | 1989-10-31 |