Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7892640 | Conjugate fibers excellent in antistatic property, water absorption and cool feeling by contact | — | 2011-02-22 |
| 6248445 | Composite filament yarn and process and spinneret for manufacturing the same | Yukio Yamakawa, Soichiro Tanaka, Koji Itonaga | 2001-06-19 |
| 6048613 | Elastic polyurethane yarn and method of manufacturing the same | Yukio Yamakawa, Kiyoshi Yoshimoto, Shigeru Tokutomi, Teruyoshi Kawata | 2000-04-11 |
| 4564679 | Chromogenic compounds | Yoshiharu Fujino, Hajime Kawai, Katsuhiko Tsunemitsu | 1986-01-14 |