Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6309429 | Lead acid storage battery and method of bonding battery cell terminal posts and bushings | David L. Lund, William H. Kump | 2001-10-30 |
| 5905002 | Lead acid storage battery | David L. Lund, William H. Kump | 1999-05-18 |