Issued Patents All Time
Showing 151–175 of 197 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5568467 | Information recording format having a plurality of bands with independent read and write control data | Masahiro Inagaki, Haruo Yamashita, Yasushi Azumatani, Hiroshi Hamasaka | 1996-10-22 |
| 5566350 | Information device for providing fast data transfer with minimum overhead | Yuji Takagi, Isao Satoh, Yasushi Azumatani, Hiroshi Hamasaka | 1996-10-15 |
| 5564013 | Optical information recording and reproducing apparatus adapted to optically record and reproduce data in a sector, and method thereof | Motoshi Ito, Kazuhiro Aoki | 1996-10-08 |
| 5513160 | Optical disc and contamination detection system in an apparatus for recording and reproducing the same | Isao Satoh, Yuji Takagi, Yasushi Azumatani | 1996-04-30 |
| 5485439 | Method for recording/reproducing information and apparatus therefor | Hiroshi Hamasaka, Isao Satoh, Yuji Takagi, Yasushi Azumatani | 1996-01-16 |
| 5475668 | Method of producing file management structures, information reproduction apparatus and information reproducing method | Yasushi Azumatani, Isao Satoh, Yuji Takagi, Hiroshi Hamasaka | 1995-12-12 |
| 5457794 | Information retrieval apparatus for searching target literature data from an information recording medium, including reuse of past retrieving results | Yasushi Azumatani, Isao Satoh, Yuji Takagi, Hiroshi Hamasaka, Yuji Hisakado | 1995-10-10 |
| 5428597 | Multi-layered optical disk with track and layer identification | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1995-06-27 |
| 5404357 | Information writing and reading apparatus | Motoshi Ito | 1995-04-04 |
| 5359584 | Data recording/reproducing method and apparatus having means for reliable detection of unrecorded sectors | Isao Satoh, Yuzuru Kuroki, Tamotsu Matsuo | 1994-10-25 |
| 5313612 | Information recording and reproducing apparatus including both data and work optical disk drives for restoring data and commands after a malfunction | Isao Satoh | 1994-05-17 |
| 5303225 | Multi-layered optical disk with track and layer identification | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1994-04-12 |
| 5293566 | Information recording and reproducing apparatus | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1994-03-08 |
| 5270877 | Information recording medium and information recording and reproducing apparatus | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1993-12-14 |
| 5253242 | Double-sided optical disc player | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1993-10-12 |
| 5243581 | Data recording/reproducing apparatus having plural optical disk drives operating in parallel | Takagi Yuji, Isao Satoh, Yasushi Azumatani, Hiroshi Hamasaka | 1993-09-07 |
| 5237553 | Data recording and reproducing apparatus having a plurality of operating modes | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1993-08-17 |
| 5216677 | Data reproducing apparatus | Yuji Takagi, Isao Satoh, Katsumi Murai | 1993-06-01 |
| 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, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1993-05-25 |
| 5214635 | Erasable optical disk and optical information recording/reproduction apparatus | Isao Satoh, Makoto Ichinose, Yuzuru Kuroki | 1993-05-25 |
| 5202876 | Optical disc recording-reproducing apparatus in which sector substitution of defective sectors is performed | Yuji Takagi, Isao Satoh, Yasushi Azumatani, Hiroshi Hamasaka | 1993-04-13 |
| 5184341 | Information recording method having successive data write and data verify operations | Hiroshi Hamasaka, Isao Satoh | 1993-02-02 |
| 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, Makoto Ichinose, Yuzuru Kuroki, Yuji Takagi | 1992-12-22 |
| 5161143 | Information recording-reproducing apparatus for optimizing data transfer | Isao Satoh, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 1992-11-03 |
| 5153885 | Bit error measuring apparatus | Yasushi Azumatani, Isao Satoh, Yuji Takagi, Hiroshi Hamasaka | 1992-10-06 |