Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861633 | Cylindrical filter | — | 1989-08-29 |
| 4840846 | Heat-adhesive composite fibers and method for making the same | Shozo Ejima, Taizo Sugihara | 1989-06-20 |
| 4818587 | Nonwoven fabrics and method for producing them | Shozo Ejima, Taizo Sugihara | 1989-04-04 |