Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5388105 | Method of recording/reproducing optical disk data | Yuji Takagi, Isao Satoh | 1995-02-07 |
| 5359584 | Data recording/reproducing method and apparatus having means for reliable detection of unrecorded sectors | Yoshihisa Fukushima, Isao Satoh, Tamotsu Matsuo | 1994-10-25 |
| 5214635 | Erasable optical disk and optical information recording/reproduction apparatus | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima | 1993-05-25 |
| 5173886 | Composite optical disc having both a data read-only area and a data rewritable area, and a recording/reproducing system for use therewith | Isao Satoh, Yoshihisa Fukushima, Makoto Ichinose, Yuji Takagi | 1992-12-22 |
| 5077720 | Optical information recording and reproducing system and optical disk | Yuji Takagi, Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yasushi Azumatani | 1991-12-31 |
| 5073887 | Optical disk recording and reading system with directory data access mechanism | Yuji Takagi, Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima | 1991-12-17 |
| 5054017 | Optical information reproducing apparatus | Jun Hiroyoshi, Isao Satoh | 1991-10-01 |
| 5051998 | Data block deinterleaving and error correction system | Katsumi Murai, Isao Satoh | 1991-09-24 |
| 5023854 | Disc having a data read-only area and a data recording arm and a recording reproducing system therefor | Isao Satoh, Yoshihisa Fukushima, Makoto Ichinose, Yuji Takagi | 1991-06-11 |
| 4986668 | Information recording and reproducing apparatus with management of defective sector | Yoshihisa Fukushima, Isao Satoh, Makoto Ichinose, Yuuji Takagi | 1991-01-22 |
| 4969139 | Optical information recording and reproducing apparatus having an improved detection system for detecting fouling of a disk or an internal optical system | Yasushi Azumatani, Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuji Takagi | 1990-11-06 |
| 4964094 | Optical disk | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani | 1990-10-16 |
| 4949326 | Optical information recording and reproducing system using optical disks having an error correction function | Yuji Takagi, Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yasushi Azumatani | 1990-08-14 |
| 4939713 | Erasable optical disk and optical information recording/reproduction apparatus | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima | 1990-07-03 |
| 4885735 | Information recording and reproducing apparatus with management of defective sector | Yoshihisa Fukushima, Isao Satoh, Makoto Ichinose, Yuuji Takagi | 1989-12-05 |
| 4879704 | Optical disk, optical disk recording and reproducing apparatus and copy preventive method for optical disks | Yuuji Takagi, Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima | 1989-11-07 |
| 4833663 | Information recording/reproducing apparatus for handling defective sectors on an optical disk | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuji Takagi | 1989-05-23 |
| 4823333 | Optical disk duplicating apparatus using sector data identification information for controlling duplication | Isao Satoh, Yoshihisa Fukushima, Makoto Ichinose, Yuji Takagi | 1989-04-18 |
| 4821254 | Information recording and reproducing apparatus which detects deterioration of a medium in each sector before recording | Isao Satoh, Yoshihisa Fukushima, Makoto Ichinose, Yuji Takagi | 1989-04-11 |
| 4805046 | Information recording and reproducing apparatus using sectors divided into a plurality of frames and having means for proper storage of the frame data | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuuji Takagi | 1989-02-14 |
| 4799208 | Optical recording and reproducing apparatus having erasing function with controllable erasing beam | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuuji Takagi | 1989-01-17 |
| 4789911 | Information recording and reproducing apparatus | Yoshihisa Fukushima, Isao Satoh, Makoto Ichinose, Yuuji Takagi | 1988-12-06 |
| 4789974 | Optical information recording/reproducing apparatus | Isao Satoh, Makoto Ichinose, Katsumi Murai | 1988-12-06 |
| 4769804 | Optical data recording and reproducing apparatus with erase function diagnosis | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuji Takagi | 1988-09-06 |
| 4768181 | Apparatus for determining defective or non-used sectors of an optical dish | Makoto Ichinose, Isao Satoh, Tatuo Sugimura | 1988-08-30 |