Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6224723 | Electrowinning anodes which rapidly produce a protective oxide coating | R. David Prengaman | 2001-05-01 |
| 6177056 | Process for recycling lead-acid batteries | R. David Prengaman, Homer P. Hine, Gerald M. Griffin, Jr. | 2001-01-23 |
| 5172850 | Electrowinning anode and method of manufacture | Raymond D. Prengaman | 1992-12-22 |
| 4397549 | Method for removal of LIDAR background backscattering by subtraction of multiple-delayed return signal | — | 1983-08-09 |