Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882605 | Electrophotographic copying machine | — | 1989-11-21 |
| 4880703 | Acicular electroconductive titanium oxide and process for producing same | Haruo Okuda, Hideo Takahashi, Eiji Yamada | 1989-11-14 |