Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828022 | Heat conducting sleeve | Charles W. Koehler | 1989-05-09 |
| 4614025 | Method for making a lightweight bipolar metal-gas battery | Charles W. Koehler | 1986-09-30 |
| 4470709 | Cylindrical tapered sleeve optimized for weight and heat conduction | Charles W. Koehler | 1984-09-11 |