Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12324085 | Microwave plasma treatment device | Hideaki Yamada, Akiyoshi Chayahara | 2025-06-03 |
| 11522055 | Stack comprising single-crystal diamond substrate | Shinya Ohmagari, Hideaki Yamada, Hitoshi Umezawa, Nobuteru Tsubouchi, Akiyoshi Chayahara +3 more | 2022-12-06 |
| 11355591 | Single crystal diamond and semiconductor element using same | Shinya Ohmagari, Hideaki Yamada, Akiyoshi Chayahara | 2022-06-07 |
| 9410241 | Method for separating surface layer or growth layer of diamond | Akiyoshi Chayahara, Hideaki Yamada | 2016-08-09 |
| 8940266 | Large diamond crystal substrates and methods for producing the same | Hideaki Yamada, Akiyoshi Chayahara, Shinichi Shikata | 2015-01-27 |
| 7736435 | Method of producing single crystal | Akiyoshi Chayahara, Yuji Horino, Naoji Fujimori | 2010-06-15 |
| 5637880 | Method for extracting ion current from space of high vacuum into space of low vacuum | Yuji Horino, Kanenaga Fujii, Akiyoshi Chayahara, Atsushi Kinomura | 1997-06-10 |