Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE41928 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2010-11-16 |
| RE41918 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2010-11-09 |
| RE40908 | Optical recording/reproducing apparatus for optical disks with various disk substrate thickness | Naoyasu Miyagawa | 2009-09-08 |
| 7436697 | Memory cell, memory using the memory cell, memory cell manufacturing method, and memory recording/reading method | Motoyoshi Murakami | 2008-10-14 |
| RE40229 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2008-04-08 |
| RE40133 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2008-03-04 |
| RE40017 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2008-01-22 |
| RE39883 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2007-10-16 |
| RE39860 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2007-09-25 |
| 7239588 | Method and apparatus for detecting foreign body on object surface, and optical disk apparatus | Seiji Nishiwaki, Yoshiaki Komma | 2007-07-03 |
| RE39447 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 2006-12-26 |
| 6791681 | Apparatus and method for determining existence range of foreign substance | Seiji Nishiwaki | 2004-09-14 |
| 6744706 | Optical system with tracking controller | Naoyasu Miyagawa, Tetsuya Akiyama | 2004-06-01 |
| 6487147 | Optical information recording medium and an optical information recording/reproduction device | Naoyasu Miyagawa, Tetsuya Akiyama | 2002-11-26 |
| 6118752 | Optical information recording medium offset pre-pit array indicating identification information | Naoyasu Miyagawa | 2000-09-12 |
| RE36445 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 1999-12-14 |
| 5694387 | Optical medium having a data pattern for detecting an upside-down insertion, and reproducing apparatus for use therewith | Yoshihisa Fukushima, Michiyoshi Nagashima | 1997-12-02 |
| 5616390 | Optical recording medium permitting detection of identification signals in land areas and groove areas, optical information recording/reproducing apparatus and apparatus for producing an original disk for forming a disk substrate | Naoyasu Miyagawa | 1997-04-01 |
| 5475662 | Optical disc apparatus with tracking error compensation | Naoyasu Miyagawa | 1995-12-12 |
| 5452284 | Optical recording/reproducing medium and apparatus using land and groove encoded information signals and identification signals including position information | Naoyasu Miyagawa | 1995-09-19 |
| 5255260 | Optical recording apparatus employing stacked recording media with spiral grooves and floating optical heads | Noboru Yamada, Isao Satoh, Sadao Mizuno | 1993-10-19 |
| 5235581 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Naoyasu Miyagawa | 1993-08-10 |
| 5231617 | Optical information recording and reproducing apparatus and method of recording and reproducing information in an optical disk unit | Isao Satoh, Sadao Mizuno, Noboru Yamada | 1993-07-27 |
| 5030847 | Pulse-width modulator and driving circuit | Koichi Yamada, Shigeyoshi Hayashi | 1991-07-09 |
| 4525657 | Torque ripple compensation circuit for a brushless D.C. motor | Hiromi Nakase, Kuniichi Ozawa | 1985-06-25 |