Okamoto; Tosaku
Patent Applications and Registrations
Patent applications and USPTO patent grants for Okamoto; Tosaku.The latest application filed is for "multi-color heat sensitive recording material".
- Okamoto; Tosaku - Osaka JP
| Patent | Date |
|---|---|
| Multi-color heat sensitive recording material Grant 4,906,604 - Okamoto , et al. March 6, 1 | 1990-03-06 |
| Two-color heat-sensitive recording material with 2-hydroxy-3-naphthoanilide as both coupler and color developing agent Grant 4,828,957 - Yonese , et al. May 9, 1 | 1989-05-09 |
| Heat-sensitive recording diazo material with recording sensitizer Grant 4,659,643 - Ishida , et al. April 21, 1 | 1987-04-21 |
| Heat and light-sensitive recording materials with dialonium compound, coupler, and heat fusible amidine or diamidine compound Grant 4,652,512 - Ishida , et al. March 24, 1 | 1987-03-24 |
| Multicolor record material Grant 4,529,992 - Ishida , et al. July 16, 1 | 1985-07-16 |
| Heat-sensitive record material Grant 4,510,512 - Okamoto , et al. April 9, 1 | 1985-04-09 |
| Method for the production of a color developer and the obtained color developer Grant 4,134,847 - Oda , et al. January 16, 1 | 1979-01-16 |
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