Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687871 | Spill container for above ground storage tanks | — | 1997-11-18 |
| 5674045 | Manhole cover moving apparatus and method | Donald Eckloff | 1997-10-07 |
| 5660214 | Overfill prevention for liquid storage tanks | — | 1997-08-26 |
| 5593116 | Hose retractor | Douglas T. Main, Jr., Robert J. Milo | 1997-01-14 |