Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4912025 | Photographic recording material for accelerated development | Norma B. Platt, Drake M. Michno, David T. Southby | 1990-03-27 |
| 4859578 | Photographic recording material providing improved granularity properties | Drake M. Michno, Norma B. Platt, David T. Southby | 1989-08-22 |