Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11851364 | Synthetic quartz glass substrate and making method | Junichiro Nishida, Kazuo Shirota, Masaki Takeuchi | 2023-12-26 |
| 10611676 | Method for preparing synthetic quartz glass substrate | Daijitsu Harada, Kazuo Shirota, Masaki Takeuchi | 2020-04-07 |
| 10558116 | Method for preparing synthetic quartz glass substrate | Daijitsu Harada, Masaki Takeuchi, Kazuo Shirota, Kazuhiko Aoki | 2020-02-11 |
| 9487426 | Heat treatment method of synthetic quartz glass | Masaki Takeuchi, Daijitsu Harada | 2016-11-08 |
| 6421436 | Multiline telephone apparatus | — | 2002-07-16 |
| 5717751 | Telephone apparatus and private branch exchange apparatus | Kouji Yamanishi | 1998-02-10 |
| 5121269 | Digital audio tape recorder and music program jump selecting method thereof | Masami Tsuchida, Kiichiro Koguchi, Toshio Ohtani, Kiyoshi Iwai, Fumihiko Miyamoto +1 more | 1992-06-09 |
| 5079651 | Digital audio tape recorder and music program jump selecting method thereof | Masami Tsuchida, Kiichiro Koguchi, Toshio Ohtani, Kiyoshi Iwai, Fumihiko Miyamoto +1 more | 1992-01-07 |