Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4752550 | Toner compositions with inner salt charge enhancing additives | Angelo J. Barbetta, Thomas R. Hoffend, Richard D. Manca, Emery G. Tokoli | 1988-06-21 |
| 4493883 | Electrophotographic toner compositions containing novel imide charge control _additives | Robert J. Gruber, Paul C. Julien, Raymond A. Yourd, III | 1985-01-15 |
| 4415646 | Nitrogen containing polymers as charge enhancing additive for electrophotographic toner | Robert J. Gruber, Steven B. Bolte | 1983-11-15 |