Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4281256 | Compressed air energy storage system | Frederick W. Ahrens | 1981-07-28 |
| 4237692 | Air ejector augmented compressed air energy storage system | Frederick W. Ahrens | 1980-12-09 |