Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822201 | Coupling pin for sucker rod made of fiber-reinforced plastic material | Toshio Iwasaki, Akihiko Katoh, Atsuhiko Murao, Takashi Nakano, Masaru Nasu | 1989-04-18 |
| 4411964 | Composite coating steel sheets having good corrosion resistance paintability and corrosion resistance after paint coating | Tomihiro Hara, Masahiro Ogawa, Masaaki Yamashita | 1983-10-25 |