Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816994 | Rule acquisition for expert systems | Michael J. Freiling, James Alexander, Steven L. Messick | 1989-03-28 |
| 4808718 | Fused polycyclic and bridged compounds useful as calcium channel blockers | George D. Hartman, Wasyl Halczenko | 1989-02-28 |