Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12326304 | Inner spiral grooved tube with excellent heat transfer property and heat exchanger | Toshihiro Harata, Masayuki Nakamoto, Takuya Okawa | 2025-06-10 |
| 11285522 | Heat transfer tube, heat exchanger, and method for manufacturing heat transfer tube | Yuki Hateruma, Hideo Kume, Takuya Okawa | 2022-03-29 |
| 11052443 | Method of producing inner spiral grooved tube and apparatus for producing inner spiral grooved tube | Yuki Hateruma | 2021-07-06 |
| 10933456 | Production method and production device for tube with spirally grooved inner surface | Takeshi Sakagami, Yuki Hateruma | 2021-03-02 |
| 10232421 | Method of producing inner spiral grooved tube and apparatus for producing inner spiral grooved tube | Yuki Hateruma | 2019-03-19 |
| 9833825 | Production method and production device for tube with spirally grooved inner surface | Takeshi Sakagami, Yuki Hateruma | 2017-12-05 |
| 6719857 | Die casting magnesium alloy | Koichi Ohori, Takeshi Sakagami | 2004-04-13 |