Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4547939 | Secondary batteries | William L. McDowall | 1985-10-22 |
| 4307758 | Method and apparatus for applying paste to battery grids | William L. McDowall, Trevor W. North, Erich Kaufmann | 1981-12-29 |
| 4239839 | Multi-cell batteries | William L. McDowall | 1980-12-16 |
| 4209575 | Multi-cell batteries | William L. McDowall | 1980-06-24 |