Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822201 | Coupling pin for sucker rod made of fiber-reinforced plastic material | Toshio Iwasaki, Akihiko Katoh, Masakazu Tsukada, Takashi Nakano, Masaru Nasu | 1989-04-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822201 | Coupling pin for sucker rod made of fiber-reinforced plastic material | Toshio Iwasaki, Akihiko Katoh, Masakazu Tsukada, Takashi Nakano, Masaru Nasu | 1989-04-18 |