Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4232061 | Magnetic recording medium and process for producing the same | Seizi Hattori, Koichi Makino, Masayoshi Shinohara | 1980-11-04 |
| 4215158 | Magnetic recording medium and process for producing the same | Seizi Hattori, Kazuo Kobayashi, Koichi Makino, Wakatake Matsuda | 1980-07-29 |