Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865931 | Secondary electrical energy storage device and electrode therefor | Francis P. McCullough, Jr. | 1989-09-12 |
| 4806227 | Carbon black inhibition of pitch polymerization | Louis D. Hoblit | 1989-02-21 |