Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865407 | Optical waveguide element, method of making the same and optical coupler employing optical waveguide element | Akihiro Suzuki, Makoto Suzuki, Yutaka Hattori, Masayuki Yoshida, Kazunari Taki +1 more | 1989-09-12 |
| 4807204 | Magneto-optical recording medium having pairs of mutually corresponding recording segments, and apparatus for recording information on the medium | Shuzo Mizutani, Riki Matsuda, Kazunari Taki, Yutaka Hattori, Shinichi Hirahata | 1989-02-21 |