Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8154981 | Record medium, its manufacturing method, mother disc for record medium, and its manufacturing method | Sohmei Endoh, Takahiro Igari, Makoto Watanabe, Hiroyuki Takemoto, Tadao Suzuki +2 more | 2012-04-10 |
| 6975578 | Optical recording medium with grooves, optical recording medium master with grooves, apparatus for manufacturing optical recording medium master with grooves, and optical recording/reproducing apparatus | Sohmei Endoh, Ikuhiro Hideta | 2005-12-13 |
| 6487164 | Optical recording medium capable of assuring sufficient levels of signals required for reading/writing data, and stamper for manufacture of the same | Sohmei Endoh, Manabu Iwai, Tomiji Tanaka, Hiroshi Nakayama, Masayoshi Kanno +1 more | 2002-11-26 |
| 6349085 | High density recording medium with pit width to track pitch ratio in the range of 0.4 to 0.55 for push-pull tracking servo control | Sohmei Endoh, Mitsuo Arima | 2002-02-19 |
| 5838654 | Optical recording medium having a specified range of pit widths and pit depths | Masaki Kagawa | 1998-11-17 |
| 5822294 | Optical recording medium having a specified range of pit widths and pit depths | Masaki Kagawa, Hiroshi Nomura, Hiroyuki Takemoto | 1998-10-13 |
| 5763037 | Base for optical recording medium and stamper for manufacturing base of optical recording medium | Hiroshi Nomura | 1998-06-09 |
| 5715223 | Method of measuring a deviation between a centerline between grooves and a control prepit pattern on a disc | — | 1998-02-03 |
| 5663946 | Optical disc having buffering areas capable of storing a pattern for obtaining tracking error signals and recording and/or reproducing apparatus therefor | — | 1997-09-02 |
| 5661706 | Recording and reproducing apparatus and recording and reproducing method providing real time editing while data is being input | — | 1997-08-26 |
| 5539724 | Optical disk having wobbled, discontinuous grooves | — | 1996-07-23 |