Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5122160 | Benzoquinone dye, rope-dyeing dye compositions, cotton rope-dyeing methods using same, and the thus dyed materials | Hitoshi Koshida, Takayuki Nakayama, Hiroshi Suwa, Akitoshi Igata, Masao Imai | 1992-06-16 |
| 5061290 | Rope dyeing process using halogen indigo derivative and dyed article thus obtained | Hitoshi Koshida, Takayuki Nakayama, Hiroshi Suwa | 1991-10-29 |
| 5034016 | Dye compositions for dyeing denim cotton yarn in a range of colors and dyeing process and dyed articles using same | Hitoshi Koshida, Takayuki Nakayama, Hiroshi Suwa, Masao Imai, Akio Karasawa | 1991-07-23 |
| 4941887 | Quinophtahalone derivatives for dyeing denim cotton yarn, optionally with indigo dyes to give yellow, green or black shades | Takayuki Nakayama, Hisanobu Kunihiro, deceased, by Masako Kunihiro, legal representative | 1990-07-17 |