Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349218 | Copying material employing fluoran color formers | Jean C. Petitpierre | 1982-09-14 |
| 4349679 | Pyrrolidino and piperidino benz ring substituted phthalides | Michael J. Whitehead | 1982-09-14 |