Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7354689 | Process for producing toner | Victor Berko-Boateng, Hui Chang | 2008-04-08 |
| 5888691 | Process for producing toner | Mit G. Turakhia, Hui Chang | 1999-03-30 |
| 5787329 | Organic coated development electrodes and methods thereof | Edward J. Gutman, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe +5 more | 1998-07-28 |
| 5761587 | Coated development electrodes and methods thereof | Edward J. Gutman, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe +5 more | 1998-06-02 |
| 5722008 | Copy machine with physical mixing of distinct toner to form a custom colored toner | — | 1998-02-24 |
| 5627003 | Cleaning processes | Don B. Jugle | 1997-05-06 |
| 5569572 | Processes for controlling developer aging | George W. Vianco | 1996-10-29 |
| 5045423 | Toner and developer compositions with charge enhancing additives | Joseph R. Weber, Edward J. Gutman, John L. Haack | 1991-09-03 |
| 4963455 | Developer compositions with suspension polymerized styrene butadiene resins | Hui Chang, Richard D. Manca, Angelo J. Barbetta | 1990-10-16 |
| 4937157 | Toner and developer compositions with charge enhancing additives | John L. Haack, Michael Smith | 1990-06-26 |
| 4904762 | Toner compositions with charge enhancing additives | Hui Chang, Maria E. McCall | 1990-02-27 |
| 4678734 | Process for developer compositions | C. D. Zimmer, Deepak R. Maniar, Meurig W. Williams | 1987-07-07 |
| 4494863 | Cleaning apparatus for a charge retentive surface | — | 1985-01-22 |