Issued Patents 2023
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11701943 | Method of manufacturing a hollow spring member | Masahiro Umezawa | 2023-07-18 |
| 11685211 | Hollow coil spring and suspension device for vehicle | Masahiro Umezawa | 2023-06-27 |
| 11602577 | Water-absorbing agent and method for producing same, and absorbent article produced using water-absorbing agent | Kazuki Kimura, Nobuya TANAKA, Yuki Tanaka | 2023-03-14 |