Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889967 | Plural welding rod welding apparatus | Hajime Iida | 1989-12-26 |
| 4886135 | Engine cooling structure for agricultural tractor | Satoshi Fujita, Eiichi Ishida | 1989-12-12 |
| 4872576 | Soft-metal made can body with squashing guides | — | 1989-10-10 |
| 4859910 | Plasma display apparatus | Tsunekiyo Iwakawa, Hiroshi Hada | 1989-08-22 |
| 4859560 | Toner for use in electrophotography | Yaosuo Kitabatake, Yoshiaki Takahashi, Kazuya Maeda | 1989-08-22 |
| 4822767 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Youichi Ohhira | 1989-04-18 |
| 4804788 | Preparation process of 4,4-dihydroxybiphenyl | Yutaka Konai, Takayuki Tanonaka, Kazuo Yoshida, Yoshihisa Machida | 1989-02-14 |
| 4795493 | Solvent for chromogenic dye-precursor material for pressure-sensitive recording paper sheet and pressure-sensitive recording paper sheet prepared by using the solvent | Yoshio Okada, Youichi Ohhira | 1989-01-03 |