Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5310852 | Elastic polyurethane fiber | Koji Hirai, Michihiro Ishiguro, Tatuya Oshita, Setuo Yamashita, Yukiatsu Komiya | 1994-05-10 |
| 5118780 | Polyester urethane fiber: polyester made from methyl pentane diol | Koji Hirai, Setuo Yamashita, Yukiatsu Komiya | 1992-06-02 |
| 5057369 | Heatsettable artificial hair and production thereof | Shinji Yamaguchi, Masami Ohta, Masao Kawamoto | 1991-10-15 |
| 4916013 | Artificial hair and production thereof | Masao Kawamoto, Sadao Sanada | 1990-04-10 |
| 4745027 | Fiber having high density and roughened surface | Takao Akagi, Masanori Sato, Shinji Yamaguchi | 1988-05-17 |
| 4451534 | Synthetic fibers imparted with an irregular surface and a process for their production | Takao Akagi, Shinji Yamaguchi, Kazuo Yamamoto | 1984-05-29 |
| 4254182 | Polyester synthetic fiber containing particulate material and a method for producing an irregularly uneven random surface having recesses and projections on said fiber by chemically extracting said particulate material | Shinji Yamaguchi, Takao Akagi, Takaakira Tsuji, Masao Kawamoto, Akira Kubotsu | 1981-03-03 |