Issued Patents All Time
Showing 51–70 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7361456 | Method of manufacturing master disk, apparatus of manufacturing master disk, method of detecting moving distance difference of master disk, and apparatus of detecting moving distance difference of master disk | Masahiko Tsukuda | 2008-04-22 |
| 7359305 | Electron beam recorder and electron beam irradiation position detecting method | Masahiko Tsukuda | 2008-04-15 |
| 7315508 | Multi-layer optical disk and method of producing multi-layer optical disk | — | 2008-01-01 |
| 7272099 | Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinhole mechanism | Masahiko Tsukuda, Morio Tomiyama, Shuji Sato, Eiichi Ito | 2007-09-18 |
| 7236434 | Exposure apparatus of an optical disk master, method of exposing an optical disk master, and wavefront fluctuation correction mechanism | Masahiko Tsukuda, Morio Tomiyama, Shuji Sato, Eiichi Ito | 2007-06-26 |
| 7101588 | Apparatus and method for applying liquid material to form a resin layer | Eiichi Ito, Kazuya Hisada, Kazuhiro Hayashi, Eiji Ohno | 2006-09-05 |
| 7068590 | Optical disc and manufacturing method for the same | Masahiko Tsukuda, Shuji Sato | 2006-06-27 |
| 7053394 | Recording device of master disk for information recording medium | — | 2006-05-30 |
| 7046613 | Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinhole mechanism | Masahiko Tsukuda, Morio Tomiyama, Shuji Sato, Eiichi Ito | 2006-05-16 |
| 6974066 | Built-in equipment type stapler | — | 2005-12-13 |
| 6894959 | Method and apparatus for exposing optical disk master | Shuji Sato, Morio Tomiyama, Masahiko Tsukuda, Eiichi Ito | 2005-05-17 |
| 6882605 | FOCUSING METHOD, METHOD OF DETECTING FOCAL POINT DEVIATION, METHOD OF FORMING MASTER OF DATA STORAGE MEDIUM, FOCUSING CONTROL UNIT, UNIT FOR DETECTING FOCAL POINT DEVIATION, AND UNIT FOR FORMING MASTER OF DATA STORAGE MEDIUM | — | 2005-04-19 |
| 6842420 | Optical disc having plural grooves of different depths | Masahiko Tsukuda, Shuji Sato | 2005-01-11 |
| 6835432 | Optical disc and method for manufacturing the optical disc | Kazuhiro Hayashi | 2004-12-28 |
| 6715654 | Staple cartridge system | Shinpei Sugihara, Hiroshi Udagawa | 2004-04-06 |
| 6700862 | Optical disc and manufacturing method for the same | Masahiko Tsukuda, Shuji Sato | 2004-03-02 |
| 6698640 | Motor operated stapler | Katsuya Hakozaki | 2004-03-02 |
| 6247012 | Information reception and delivery system using global and local directory tables in an intranet | Koji Kitamura, Akira Kubota, Toshikuni Hamano, Kotaro Tsukuda, Shigeru Miki | 2001-06-12 |
| 6216936 | Cover mechanism in cartridge for electric stapler | — | 2001-04-17 |
| 5756265 | Multilayer optical disc and method of making same | Toshinori Kishi | 1998-05-26 |