Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4704266 | Method for producing lithium aluminate powders | Hiroshi Umezaki, Hideaki Murakami, Toshiyuki Mizoe | 1987-11-03 |
| 4671993 | Magnetic recording medium | Hiroshi Umezaki, Hideaki Murakami | 1987-06-09 |
| 4650895 | Process for producing high purity metallic compound | Hiroshi Umezaki, Yoshihiro Higuchi | 1987-03-17 |
| 4584243 | Abrasive, production thereof and use thereof in magnetic recording medium | Hiroshi Umezaki, Hideaki Murakami | 1986-04-22 |
| 4498931 | Pigmented aluminum oxide powder and method of producing the same | Hiroshi Umezaki | 1985-02-12 |
| 4495121 | Process for producing inorganic fiber | Shozo Horikiri, Masaji Harakawa, Kunio Saegusa, Masao Yamagiwa | 1985-01-22 |