Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5321557 | Magnetic recording and reproducing apparatus having multiple magnetic heads | Masafumi Shimotashiro, Takeshi Inoue, Hiroshi Okamoto, Masaru Higashionji, Tetsuya Mizushima +1 more | 1994-06-14 |
| 5313346 | Tracking error detection system having at least two magnetic heads with opposite azimuths and circuitry for detecting tracking error by determining a phase difference of output signals from all circuits based on signals produced by the magnetic heads | Masafumi Shimotashiro, Tetsuya Mizushima, Hiroshi Okamoto | 1994-05-17 |
| 5299072 | Video and audio signal recording apparatus with editing-use erase heads | Yoshiho Gotoh, Tatsushi Bannai | 1994-03-29 |
| 4891588 | Device for detecting rotation speed having feedback circuitry and improved frequency-response | Hiroshi Okamoto | 1990-01-02 |