Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885730 | Analog electronic timepiece using an intermittent driving signal | — | 1989-12-05 |
| 4880464 | Electroless gold plating solution | Jiro Ushio, Hitoshi Yokono, Akira Tomizawa | 1989-11-14 |
| 4864442 | Magnetic read/write apparatus | Nobuo Ishikawa, Mamoru Miyasaka, Kenichi Hirota | 1989-09-05 |
| 4839760 | Read/write apparatus for disk cartridge | Noboru Yamada, Tomohiko Abe | 1989-06-13 |
| 4804559 | Electroless gold plating solution | Jiro Ushio, Hitoshi Yokono, Akira Tomizawa | 1989-02-14 |