Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35272 | Apparatus and method for lining landfills, reservoirs, hazardous waste disposal sites and the like | Michael Mathieson | 1996-06-11 |
| 5139853 | Apparatus and method for lining landfills, reservoirs, hazardous waste disposal sites and the like | Michael Mathieson | 1992-08-18 |