Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877717 | Process for the production of optical elements | Toshihiro Suzuki, Yasuyuki Todokoro | 1989-10-31 |
| 4810965 | Position detecting apparatus using a magnetic sensor and a closed magnetic circuit with non-uniform magnetic flux distribution | Yoshiro Fujiwara, Michiko Endo, Yuji Kojima, Noboru Wakatsuki, Akira Hirano | 1989-03-07 |