Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5544974 | System for underground storage and delivery of liquid product, and recovery of leakage | Lawrence Mohns, Richard Oswald | 1996-08-13 |
| 5220823 | Double walled underground storage tank | John Burwell, Dave Correll | 1993-06-22 |
| 5168676 | Horizontally ribbed dome for habitation enclosure | Timothy R. Berg | 1992-12-08 |
| 4958957 | System for underground storage and delivery of liquid product, and recovery of leakage | Lawrence Mohns, Richard Oswald | 1990-09-25 |
| 4948007 | Underground storage tank of corrosion-resistant materials with internal steel rib | John Burwell | 1990-08-14 |
| 4613174 | Reversible latching hinge | Douglas Morrissette, Walter Ecker | 1986-09-23 |
| 4461232 | Lightweight marine barge cover | — | 1984-07-24 |