Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6154904 | Combination head support and carry bag | — | 2000-12-05 |
| 5642834 | Secondary containment reservoir device | Mark D. Shaw, J. Tad Heyman, Laurence M. Bierce | 1997-07-01 |
| 5615608 | Reinforced containment pallet | Mark D. Shaw, J. Tad Heyman, Laurence M. Bierce | 1997-04-01 |
| 5577539 | Drum-top drainfield funnel | Mark D. Shaw, J. Tad Heyman, Laurence M. Bierce | 1996-11-26 |
| D364629 | Drum top drainfield funnel | Mark D. Shaw, J. Tad Heyman, Laurence M. Bierce | 1995-11-28 |
| D364255 | Single drum collection container | Mark D. Shaw, J. Tad Heyman, Laurence M. Bierce | 1995-11-14 |