Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11331933 | Cassette and system | Sumio Watanabe, Masahiro Yanagi, Toshiya Koyama, Tatsuya Oguchi | 2022-05-17 |
| 10754589 | Terminal device and communication system | Masahiro Yanagi, Sumio Watanabe, Toshiya Koyama, Tatsuya Oguchi | 2020-08-25 |
| 9437553 | Electronic device | Tohru Muramatsu, Toshiya Koyama, Masakazu Muranaga | 2016-09-06 |
| D315368 | Curling stone | — | 1991-03-12 |