Issued Patents All Time
Showing 51–63 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5253242 | Double-sided optical disc player | Isao Satoh, Yoshihisa Fukushima, Yuji Takagi, Hiroshi Hamasaka | 1993-10-12 |
| 5243581 | Data recording/reproducing apparatus having plural optical disk drives operating in parallel | Takagi Yuji, Isao Satoh, Yoshihisa Fukushima, Hiroshi Hamasaka | 1993-09-07 |
| 5237553 | Data recording and reproducing apparatus having a plurality of operating modes | Yoshihisa Fukushima, Isao Satoh, Yuji Takagi, Hiroshi Hamasaka | 1993-08-17 |
| 5214626 | Information recording/reproducing apparatus for writing on and reading from a rewritable optical disk have tracks divided into a plurality of sectors | Isac Satoh, Yoshihisa Fukushima, Yuji Takagi, Hiroshi Hamasaka | 1993-05-25 |
| 5202876 | Optical disc recording-reproducing apparatus in which sector substitution of defective sectors is performed | Yuji Takagi, Isao Satoh, Yoshihisa Fukushima, Hiroshi Hamasaka | 1993-04-13 |
| 5161143 | Information recording-reproducing apparatus for optimizing data transfer | Yoshihisa Fukushima, Isao Satoh, Yuji Takagi, Hiroshi Hamasaka | 1992-11-03 |
| 5153885 | Bit error measuring apparatus | Isao Satoh, Yoshihisa Fukushima, Yuji Takagi, Hiroshi Hamasaka | 1992-10-06 |
| 5138599 | Information recording medium having dummy tracks and information recording and reproducing apparatus | Yoshihisa Fukushima, Isao Satoh | 1992-08-11 |
| 5077720 | Optical information recording and reproducing system and optical disk | Yuji Takagi, Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki | 1991-12-31 |
| 4984230 | Rewritable optical disk with defective-sector substitution arrangement and optical information recording and reproducing system | Isao Satoh, Yoshihisa Fukushima, Yuji Takagi | 1991-01-08 |
| 4969139 | Optical information recording and reproducing apparatus having an improved detection system for detecting fouling of a disk or an internal optical system | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki, Yuji Takagi | 1990-11-06 |
| 4964094 | Optical disk | Isao Satoh, Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki, Yuji Takagi | 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, Yuzuru Kuroki | 1990-08-14 |