Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11068289 | Installation assist apparatus, installation assist method, and computer program product | Hideki Ohkawa, Hiroya Kakimoto, Masayuki Tsuda, Izumi Igawa | 2021-07-20 |
| 10823601 | Water level measuring system, information processing apparatus, and water level measuring method | Izumi Igawa | 2020-11-03 |
| 10698098 | Millimeter wave radar and millimeter wave radar detection method | Izumi Igawa, Yutaka Aoki | 2020-06-30 |
| 10571327 | Water level measuring device | Izumi Igawa | 2020-02-25 |
| 10495747 | Snow quality measuring apparatus and snow quality measuring method | Yutaka Aoki, Jin Mikata, Ryuji Murata | 2019-12-03 |
| 7633844 | Optical information recording apparatus, optical information recording method, and signal processing circuit | Katsuhiro Oyama, Yoshikazu Sato, Tetsuharu Kubo | 2009-12-15 |
| 7050367 | Optical information recording method and apparatus, and recorded medium where optical information recording control program is recorded | Akira Negishi | 2006-05-23 |
| 6990049 | Optical information recording medium, method for recording/reproducing the same, and optical pickup | Yoshikazu Takagishi, Atsuo Shimizu, Keiichi Ida, Mitsuo Sekiguchi, Isao Matsuda | 2006-01-24 |
| 6874156 | Optical information recording medium | Yoshikazu Takagishi, Atsuo Shimizu, Keiichi Ida, Mitsuo Sekiguchi, Isao Matsuda | 2005-03-29 |
| 6813232 | Optical information recording/reproducing method and device therefor | Hironobu Shimizu, Atsuo Shimizu | 2004-11-02 |
| 6792613 | Optical information recording medium | Yoshikazu Takagishi, Atsuo Shimizu, Keiichi Ida, Mitsuo Sekiguchi, Isao Matsuda | 2004-09-14 |
| 6442119 | Method and apparatus for recording optical information | — | 2002-08-27 |
| 6208601 | Optical information recording method and apparatus | Atsuo Shimizu, Akira Negishi | 2001-03-27 |