Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346093 | Liquid storage system | Charles A. Frey, Sr. | 1994-09-13 |
| 4895272 | Liquid storage system | Charles A. Frey, Sr. | 1990-01-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346093 | Liquid storage system | Charles A. Frey, Sr. | 1994-09-13 |
| 4895272 | Liquid storage system | Charles A. Frey, Sr. | 1990-01-23 |