Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4685783 | Polychromic tetracyclo-spiro-adamatylidene derivatives, and polychromic lens incorporating said compounds | Harold H. Heller, Stephen N. Oliver, John Whittal, William Johncock, Clive Trundle | 1987-08-11 |