Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6092686 | Collapsible liquid containment device | Mark D. Shaw, Laurence M. Bierce | 2000-07-25 |
| 5924461 | Liquid containment apparatus with flexible side wall | Mark D. Shaw, Laurence M. Bierce | 1999-07-20 |
| 5891223 | Multi-stage vent filter | Mark D. Shaw, Laurence M. Bierce | 1999-04-06 |
| 5813680 | Hand truck with expandable secondary containment reservoir | Mark D. Shaw, Laurence M. Bierce | 1998-09-29 |
| 5642834 | Secondary containment reservoir device | Mark D. Shaw, Laurence M. Bierce, Jesse Ehredt | 1997-07-01 |
| 5636753 | Stabilizer for plural drum stacks | Dennis Wilkinson, Mark D. Shaw, Laurence M. Bierce | 1997-06-10 |
| 5615608 | Reinforced containment pallet | Mark D. Shaw, Laurence M. Bierce, Jesse Ehredt | 1997-04-01 |
| 5577539 | Drum-top drainfield funnel | Mark D. Shaw, Laurence M. Bierce, Jesse Ehredt | 1996-11-26 |
| D364629 | Drum top drainfield funnel | Mark D. Shaw, Laurence M. Bierce, Jesse Ehredt | 1995-11-28 |
| D364255 | Single drum collection container | Mark D. Shaw, Laurence M. Bierce, Jesse Ehredt | 1995-11-14 |
| 5429437 | Collapsible, self-expanding liquid container | Mark D. Shaw, Laurence M. Bierce, Dorian Thurston True, Marion Lee Jones | 1995-07-04 |
| 5117878 | Drainfield funnel | Mark D. Shaw, Laurence M. Bierce | 1992-06-02 |
| 5096083 | Polyethylene shipping drum | Mark D. Shaw, Laurence M. Bierce | 1992-03-17 |
| 5042683 | Containment storage apparatus | Mark D. Shaw, Laurence M. Bierce | 1991-08-27 |
| D317850 | Funnel | Mark D. Shaw, Laurence M. Bierce | 1991-07-02 |
| D309364 | Salvage drum | Mark D. Shaw, Laurence M. Bierce | 1990-07-17 |
| 4708258 | Salvage drum | Mark D. Shaw, Laurence M. Bierce | 1987-11-24 |