Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6151154 | Optical pickup, aberration correction unit and astigmatism measurement method | Masakazu Ogasawara, Yoshitsugu Araki, Junichi Furukawa, Kiyoshi Tateishi | 2000-11-21 |
| 6078554 | Wave-front aberration compensation unit, wave-front aberration compensation device, and optical pickup | Masayuki Iwasaki, Masakazu Ogasawara | 2000-06-20 |
| 5949748 | Optical write/read head with a pretilted liquid crystal panel | Masayuki Iwasaki | 1999-09-07 |
| 5936923 | Optical pickup with aberration correcting panel including a liquid crystal | Masayuki Iwasaki | 1999-08-10 |
| 5901131 | Optical pickup used with both DVD and CD | Masayuki Iwasaki | 1999-05-04 |
| 5734637 | Optical pickup used with both DVD and CD | Masayuki Iwasaki | 1998-03-31 |
| 5673246 | Optical pickup device | Ryo Sato | 1997-09-30 |
| 5459593 | Reflection type liquid crystal display apparatus which prevents rotation of the polarization plane | — | 1995-10-17 |
| 5009490 | Photo-conductive liquid crystal light valve | Tomomitsu Kouno, Hideki Hatano, Takashi Yamaji, Masami Nishida | 1991-04-23 |