Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5376617 | Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modification | Yojiro Kumagae, Shigeo Fujita, Mansuke Matsumoto, Sayuri Wada | 1994-12-27 |
| 5338866 | Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modification | Yojiro Kumagae, Shigeo Fujita, Mansuke Matsumoto, Sayuri Wada | 1994-08-16 |