Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221490 | Rust-preventive lubricant composition for zinc-plated steel material | Takafumi Yamaji, Yasuo Okumura, Yasuo Tanizawa, Yoshio Nagae | 1993-06-22 |
| 4973500 | Method of plating metal sheets by passing the sheet upwards in close proximity to an upwardly directed nozzle | Toshio Ishii, Shunichi Sugiyama, Michitaka Sakurai | 1990-11-27 |
| 4407899 | Surface treated steel sheets for paint coating | Tomihiro Hara, Masahiro Ogawa, Masaaki Yamashita | 1983-10-04 |