Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5013490 | Device for releasing and diffusing bubbles into liquid | Yoshiaki Eguchi | 1991-05-07 |
| 4948102 | Method of preparing high-purity metal and rotary cooling member for use in apparatus therefor | Ryotatsu Otsuka, Kazuo Toyoda | 1990-08-14 |
| 4854968 | Method of preparing high-purity metal and rotary cooling member for use in apparatus therefor | Ryotatsu Otsuka, Kazuo Toyoda | 1989-08-08 |
| 4804168 | Apparatus for treating molten metal | Ryotatsu Otsuka, Kazuo Toyoda | 1989-02-14 |
| 4772319 | Process for treating molten aluminum to remove hydrogen gas and non-metallic inclusions therefrom | Ryotatsu Otsuka, Kazuo Toyoda | 1988-09-20 |
| 4747906 | Process and apparatus for purifying silicon | Hideo Shingu, Ryotatsu Otsuka, Kazuo Toyoda | 1988-05-31 |
| 4670050 | Method of treating molten aluminum by removing hydrogen gas and nonmetallic inclusions therefrom | Ryotatsu Ootsuka, Kazuo Toyoda | 1987-06-02 |
| 4611790 | Device for releasing and diffusing bubbles into liquid | Ryotatsu Otsuka, Kazuo Toyoda | 1986-09-16 |