Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7875866 | Beam recording apparatus and beam adjustment method | Hiroaki Kitahara | 2011-01-25 |
| 7276692 | Beam adjusting sample, beam adjusting method and beam adjusting device | Masahiro Katsumura, Yoshiaki Kojima, Hiroaki Kitahara | 2007-10-02 |
| 7190664 | High density optical recording medium and method for reproducing thereof | Takuma Yanagisawa, Takayuki Nomoto, Fumihiko Yokogawa, Seiichi Ohsawa | 2007-03-13 |
| 6996043 | Optical head apparatus | Osamu Kasono, Yoshiaki Kojima | 2006-02-07 |
| 6954273 | Laser-based measuring apparatus for measuring an axial run-out in a cylinder of rotation and method for measuring the same utilizing opposing incident measuring light beams | Hiroaki Kitahara, Yoshiaki Kojima | 2005-10-11 |
| 6930961 | Grooving apparatus and grooving method | — | 2005-08-16 |
| 6586753 | Electron beam apparatus and electron beam adjusting method | — | 2003-07-01 |
| 5446722 | Information recording apparatus having magnetic shield means | Yoshiaki Kojima, Masahiro Katsumura | 1995-08-29 |
| 5319198 | Electron beam projection apparatus | — | 1994-06-07 |
| 5281978 | Object carriage system | Yoshiaki Kojima | 1994-01-25 |
| 4773062 | Optical information recording and reproducing apparatus including lens supporting mechanism employing cantilever springs | Seiichi Makimoto, Akihiro Ogata | 1988-09-20 |
| 4488012 | MFB Loudspeaker | Norio Matsuda, Masaru Chijiiwa | 1984-12-11 |
| 4477699 | Mechanical two-way loudspeaker | Isao Yamamuro | 1984-10-16 |