Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875501 | Electromagnetic proportional control valve apparatus | Kouji Ichihashi | 1989-10-24 |
| 4839509 | Connector device for connecting IC card to reading and/or writing apparatus | Tadashi Kobayashi, Masakuni Ishikawa | 1989-06-13 |