Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4619784 | Image dye-providing materials | Louis Locatell, Jr., Charles M. Zepp | 1986-10-28 |
| 4405788 | Bicyclo nitrogenheterocyclic substituted sulfofluoresceins, fluoresceins and xanthenes | Louis Locatell, Jr., Charles M. Zepp | 1983-09-20 |
| 4386216 | Magenta dye developers | Louis Locatell, Jr., Howard G. Rogers, Ruth C. Bilofsky, Charles M. Zepp | 1983-05-31 |
| 4267251 | Novel image dye-providing materials, photographic products and processes | Louis Locatell, Jr., Charles M. Zepp | 1981-05-12 |
| 4264701 | Magenta dye developers | Louis Locatell, Jr., Howard G. Rogers, Ruth C. Bilofsky, Charles M. Zepp | 1981-04-28 |