Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12378673 | Surface-treated steel sheet for organic resin coating and method of producing same, and organic resin coated steel sheet and method of producing same | Kazuhisa Okai, Rie Kaneko, Fuyuko Ikeda | 2025-08-05 |
| 11174556 | Surface-treatment solution for zinc or zinc alloy coated steel sheet, method of producing zinc or zinc alloy coated steel sheet with surface-coating layer, and zinc or zinc alloy coated steel sheet with surface-coating layer | Kazuhisa Okai, Hiroshi Kajiyama, Takashi Kawano | 2021-11-16 |