Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847174 | Thermally actuated hydrogen secondary battery | David N. Palmer, John S. Cartwright | 1989-07-11 |
| 4808494 | Thermally actuated hydrogen secondary battery | David N. Palmer, John S. Cartwright | 1989-02-28 |