Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5899614 | Output method and apparatus | Masao Maeda | 1999-05-04 |
| 5354135 | Recorder and dot pattern control circuit | Akira Nagatomo | 1994-10-11 |
| 5144608 | Apparatus for recording and reproducing information on and from a recording medium having a reference position mark | Yutaka Ogasawara | 1992-09-01 |
| 5038332 | Optical information recording medium including an optically detectable mark representing a boundary between the recording and non-recording areas | Yutaka Ogasawara | 1991-08-06 |
| 5018124 | Information recording method and apparatus for recording information on track positioned at least two tracks ahead when abnormality of tracking servo is detected | Yutaka Ogasawara | 1991-05-21 |
| 4998009 | Information recording method for recording data and directories in a plurality of blocks comprising divided recording areas | Katsumi Iijima | 1991-03-05 |
| 4982391 | Method and apparatus for accessing a desired track of a recording medium during a stopped state of recording or reproduction | Shigeyuki Taniwa, Kiyonobu Endo, Hideki Hosoya | 1991-01-01 |
| 4910724 | Information recording medium having an area for recording information indicating logical erasure of data and method for recording information | Yutaka Ogasawara | 1990-03-20 |
| 4872154 | Method for recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor | Katsumi Iijima | 1989-10-03 |
| 4870634 | Apparatus for recording and/or reproducing information data and a signal for synchronizing the same | — | 1989-09-26 |
| 4868806 | An information recording apparatus for recording a directory information unit on a single recording track of a recording medium based on the number of directory information units previously recorded in the single recording track | — | 1989-09-19 |