Nakazawa; Tadahisa
Patent Applications and Registrations
Patent applications and USPTO patent grants for Nakazawa; Tadahisa.The latest application filed is for "amorphous silica spherical particles".
- Nakazawa; Tadahisa - Tokyo JP
- Nakazawa; Tadahisa - Shibata JA
| Patent | Date |
|---|---|
| Amorphous silica spherical particles Grant 5,236,683 - Nakazawa , et al. August 17, 1 | 1993-08-17 |
| Tetracosahedral siliceous particles and process for preparation thereof Grant 5,143,708 - Nakazawa , et al. September 1, 1 | 1992-09-01 |
| Aqueous composition containing color former for pressure-sensitive production Grant 3,915,731 - Sugahara , et al. October 28, 1 | 1975-10-28 |
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