Sumita; Hiroshi
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sumita; Hiroshi.The latest application filed is for "process for producing granular hematite particles".
- Sumita; Hiroshi - Okayama-ken JP
- Sumita; Hiroshi - Hiroshima JP
| Patent | Date |
|---|---|
| Process for producing granular hematite particles Grant 6,616,747 - Sumita September 9, 2 | 2003-09-09 |
| Process for producing granular hematite particles App 20030051636 - Sumita, Hiroshi | 2003-03-20 |
| Yellow iron oxide hydroxide particles and process for producing the same Grant 6,027,559 - Morii , et al. February 22, 2 | 2000-02-22 |
| Magnetic iron oxide particles, a process for producing the same and a magnetic recording medium Grant 5,449,565 - Aoki , et al. September 12, 1 | 1995-09-12 |
| Spindle ferromagnetic alloy particles Grant 4,773,931 - Mishima , et al. September 27, 1 | 1988-09-27 |
| Process for treating acicular magnetite containing Co to stabilize the magnetic properties thereof Grant 4,136,049 - Horiishi , et al. January 23, 1 | 1979-01-23 |
| Production of acicular magnetic iron oxides Grant 4,136,158 - Okuda , et al. January 23, 1 | 1979-01-23 |
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