Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851121 | Process for rendering porous membrane hydrophilic | Minoru Yokota | 1989-07-25 |
| 4814561 | Elastic member for supporting a key top in a push button switch construction | — | 1989-03-21 |
| 4797353 | Method for developing of silver halide photographic materials utilizing reduced amounts of organic substances | Sumito Yamada, Masaki Satake | 1989-01-10 |