Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5106905 | Colorants, polyester fibers mass-colored therewith and process for spinning mass-colored polyester fibers | Shosuke Oku, Noboru Watanabe, Tsuneo Ohkawara, Fumio Hirota | 1992-04-21 |
| 4879335 | Black liquid colorant and polyester fibers dope-dyed therewith | Fumio Hirota, Shosuke Oku, Noboru Watanabe | 1989-11-07 |