Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4752369 | Electrochemical cell with improved energy efficiency | Donald L. Caldwell | 1988-06-21 |
| 4464238 | Porous separators for electrolytic processes | Donald L. Caldwell | 1984-08-07 |