Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880720 | Liquid developer compositions | Raymond W. Wong, Melvin D. Croucher | 1989-11-14 |
| 4830945 | Liquid electrophotographic developer comprising oppositely charged toner particles and dyes of different colors | Raymond W. Wong, Melvin D. Croucher | 1989-05-16 |
| 4803119 | Ink compositions for impact typewriter ribbons | James M. Duff, James D. Mayo, Richard G. Crystal | 1989-02-07 |
| 4797342 | Processes for the preparation of liquid developers with low vapor pressure components | Melvin D. Croucher, Raymond W. Wong | 1989-01-10 |