Nippon Iron Powder Co., Ltd.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Nippon Iron Powder Co., Ltd..The latest application filed is for "magnetic carrier of developer for electrophotographic copying machines composed of ferrite and a selected metal oxide".
- Nippon Iron Powder Co., Ltd. - Chiba JP
- Nippon Iron Powder Co., Ltd. - Kashiwa JA
| Patent | Date |
|---|---|
| Magnetic carrier of developer for electrophotographic copying machines composed of ferrite and a selected metal oxide Grant 4,898,801 - Tachibana , et al. February 6, 1 | 1990-02-06 |
| Process for producing activated carbon Grant 3,950,267 - Arakawa , et al. April 13, 1 | 1976-04-13 |
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