Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10533268 | Sealing material composition and gland packing containing the sealing material composition | Kazuyoshi Sato, Kohei Arakawa, Ryoji Hamaguchi, Masaru Fujiwara | 2020-01-14 |
| 10316442 | Method for producing yarn | Ryoji Hamaguchi | 2019-06-11 |
| 10100444 | Yarn and gland packing | Ryoji Hamaguchi | 2018-10-16 |
| 9239115 | Gland packing and packing set | Takahisa Ueda, Masaru Fujiwara, Katsunori Sugita, Hiroki Tanabe, Kodai Inoue | 2016-01-19 |