Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875839 | Scroll member for use in a positive displacement device, and a method for manufacturing the same | Hirotsugu Sakata, Hiroaki Murasaki, Makoto Hayano, Hitoshi Hattori, Naoya Morozumi +3 more | 1989-10-24 |
| 4861934 | Production of high-octane gas blending stock | Kazuo Hirabayashi, Tadami Kondoh, Hiroaki Nishijima | 1989-08-29 |
| 4828623 | Water resistant nacreous pigment and process for producing the same | Katsuhisa Nitta, Takaji Watanabe | 1989-05-09 |