Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7101046 | Kaleidoscope and image material assembly for kaleidoscope | Taeko Hattori | 2006-09-05 |
| 5455121 | Steel material for a colored spring | Masao Yamada, Hirofumi Ueki, Takashi Kubo | 1995-10-03 |
| 5380407 | Method for facilitating distinction between different steel products | Yukio Yamaoka, Masaru Kodama, Hirofumi Ueki | 1995-01-10 |