Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5946898 | Wire rope having an independent wire rope core | Mikio Kurata, Toshihiko Sabae | 1999-09-07 |
| 5455121 | Steel material for a colored spring | Masao Yamada, Keiji Hattori, Takashi Kubo | 1995-10-03 |
| 5380407 | Method for facilitating distinction between different steel products | Yukio Yamaoka, Keiji Hattori, Masaru Kodama | 1995-01-10 |