Issued Patents All Time
Showing 76–98 of 98 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6898024 | Optical system for optical pickup employing coma compensating element | Koichi Maruyama, Takeshi Shimano | 2005-05-24 |
| 6873590 | Objective lens for optical pick-up | Koichi Maruyama | 2005-03-29 |
| 6873475 | Objective lens for optical discs | — | 2005-03-29 |
| 6807019 | Objective lens having diffractive structure for optical pick-up | Koichi Maruyama | 2004-10-19 |
| 6791934 | Objective lens optical system, optical head and optical information reproduction apparatus | Takeshi Shimano, Tetsuo Ariyoshi, Kazuo Shigematsu, Koichi Maruyama | 2004-09-14 |
| 6791594 | Laser imaging apparatus | — | 2004-09-14 |
| 6781764 | Objective lens for optical pick-up | Koichi Maruyama | 2004-08-24 |
| 6741402 | Objective lens for optical head | Koichi Maruyama | 2004-05-25 |
| 6734890 | Scanning optical system | Daisuke Koreeda | 2004-05-11 |
| 6686948 | Laser imaging apparatus | — | 2004-02-03 |
| 6624942 | Objective lens for optical pick-up | Koichi Maruyama | 2003-09-23 |
| 6624941 | Diffraction optical element | Koichi Maruyama | 2003-09-23 |
| 6574876 | Apparatus for detecting rotational angle | — | 2003-06-10 |
| 6555808 | Apparatus for detecting rotational angle | Kouichi Ohno | 2003-04-29 |
| 6515955 | Objective optical system for optical pick-up | — | 2003-02-04 |
| 6404530 | Scanning optical system | — | 2002-06-11 |
| 6330522 | Rotational angle detector and method | — | 2001-12-11 |
| 6326609 | Scanning drawing apparatus | — | 2001-12-04 |
| 6222661 | Scanning optical system | Junji Kamikubo | 2001-04-24 |
| 6144477 | Scanning optical system | — | 2000-11-07 |
| 5973813 | Reflection type optical scanning system | — | 1999-10-26 |
| 5946126 | Laser scanning optical system | — | 1999-08-31 |
| 4960849 | Polyurethane from a copolyether of tetrahydrofuran and 3-alkyl tetrahydrofuran | Kazuaki Okabe, Hideyuki Ishii, Haruo Watanabe | 1990-10-02 |