Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5629124 | Charge controlling agent for electrostatic image development, and toner and charge-imparting material employing it | Hitoshi Ono, Noriaki Takahashi, Masako Takeuchi | 1997-05-13 |