Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4374188 | Electric storage battery | Stephen W. Campbell, Eric E. Cragg, Raymond A. Johnson | 1983-02-15 |
| D266757 | Electrical storage battery | Stephen W. Campbell, Eric E. Cragg, Raymond A. Johnson | 1982-11-02 |