Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10648710 | Heat pump system and cooling generation method | Yasuki Hirota, Ryuichi Iwata, Takafumi Yamauchi | 2020-05-12 |
| 9791216 | Heat recovery-type heating device | Takafumi Yamauchi, Takashi Shimazu, Shuzou Sanda | 2017-10-17 |
| 6733930 | Photomask blank, photomask and method of manufacture | Tamotsu Maruyama, Hideo Kaneko, Mikio Kojima, Yukio Inazuki, Satoshi Okazaki | 2004-05-11 |
| 6727027 | Photomask blank and photomask | Tetsushi Tsukamoto, Hideo Kaneko, Tamotsu Maruyama, Yukio Inazuki, Satoshi Okazaki | 2004-04-27 |