Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6187122 | Dual-weld roof membrane welding apparatus and method of using same | Michael J. Hubbard | 2001-02-13 |
| 5935357 | Dual-weld roof membrane welding apparatus and method of using same | Michael J. Hubbard | 1999-08-10 |
| 4265400 | Concrete sleeper for track circuitry | — | 1981-05-05 |