Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879335 | Black liquid colorant and polyester fibers dope-dyed therewith | Fumio Hirota, Tsutomu Kado, Noboru Watanabe | 1989-11-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879335 | Black liquid colorant and polyester fibers dope-dyed therewith | Fumio Hirota, Tsutomu Kado, Noboru Watanabe | 1989-11-07 |