Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842958 | Chromate surface treated steel sheet | Seijun Higuchi, Tomonari Ohga, Fumio Yamamoto | 1989-06-27 |
| 4731301 | Tinned steel sheet having a high degree of corrosion resistance and a method of producing the same | Seijun Higuchi, Yashichi Oyagi, Tomonari Oga, Toshinori Mizuguchi, Senkichi Tsujimura +2 more | 1988-03-15 |