Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4400449 | Lead salt electric storage battery | — | 1983-08-23 |
| 4331744 | Lead salt electric storage battery | Ziemowit A. A. Piontkowski, deceased, by Christian G. Carlsen, administrator | 1982-05-25 |