Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849791 | Waste toner collecting system | Hideaki Hagihara, Takahiro Fukunaga, Shoichiro Yoshiura | 1989-07-18 |
| 4837582 | Method and apparatus for detecting electromagnetic waves generated by the earth's crust under strain | Yoshihisa Masuda, Hisao Inuki | 1989-06-06 |