Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6225439 | Compositions for a resin | Akikazu Amagai, Masanori Shimuta, Motoharu Takeuchi | 2001-05-01 |
| 6201061 | Process for producing a novel resin for optical materials having excellent color tone and transparency | Akikazu Amagai, Motoharu Takeuchi | 2001-03-13 |
| 6197226 | Process for tinting a resin having a large refractivity index and optical material tinted by the process | Akikazu Amagai, Motoharu Takeuchi, Atsuki Niimi, Hiroshi Horikoshi | 2001-03-06 |
| 6130307 | Composition for a resin | Akikazu Amagai, Motoharu Takeuchi | 2000-10-10 |
| 6117923 | Resin for optical material | Akikazu Amagai, Masanori Shimuta, Motoharu Takeuchi | 2000-09-12 |