Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5327445 | Quantum-well type semiconductor laser device | Narihito Matsumoto, Akihiko Kasukawa, Takeshi Namegaya | 1994-07-05 |
| 5321557 | Magnetic recording and reproducing apparatus having multiple magnetic heads | Masafumi Shimotashiro, Takeshi Inoue, Masaru Higashionji, Tetsuya Mizushima, Tatsushi Bannai +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, Souichiro Fujioka | 1994-05-17 |
| 5298093 | Duplex stainless steel having improved strength and corrosion resistance | — | 1994-03-29 |