Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5429437 | Collapsible, self-expanding liquid container | Mark D. Shaw, J. Tad Heyman, Dorian Thurston True, Marion Lee Jones | 1995-07-04 |
| 5158144 | Device and method to extinguish oil well fires | Mark D. Shaw | 1992-10-27 |
| 5117878 | Drainfield funnel | Mark D. Shaw, J. Tad Heyman | 1992-06-02 |
| 5096083 | Polyethylene shipping drum | Mark D. Shaw, J. Tad Heyman | 1992-03-17 |
| 5042683 | Containment storage apparatus | Mark D. Shaw, J. Tad Heyman | 1991-08-27 |
| D317850 | Funnel | Mark D. Shaw, J. Tad Heyman | 1991-07-02 |
| D309364 | Salvage drum | Mark D. Shaw, J. Tad Heyman | 1990-07-17 |
| 4708258 | Salvage drum | Mark D. Shaw, J. Tad Heyman | 1987-11-24 |