Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837392 | Dry electrostatographic developer containing toner particles comprising a vinyl addition polymer containing a covalently bound quaternary phosphonium salt | James H. Anderson, Douglas E. Bugner, Lawrence P. DeMejo, John C. Wilson | 1989-06-06 |