Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4982653 | Method and apparatus for ventilating an enclosure accessed by a manhole | Russell B. Gordon, Jimmy A. Gordon | 1991-01-08 |
| 4794956 | Air conduit for manhole | Russell B. Gordon, Jimmy A. Gordon | 1989-01-03 |