Issued Patents All Time
Showing 51–60 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5158144 | Device and method to extinguish oil well fires | Laurence M. Bierce | 1992-10-27 |
| 5117878 | Drainfield funnel | J. Tad Heyman, Laurence M. Bierce | 1992-06-02 |
| 5096083 | Polyethylene shipping drum | J. Tad Heyman, Laurence M. Bierce | 1992-03-17 |
| 5042683 | Containment storage apparatus | J. Tad Heyman, Laurence M. Bierce | 1991-08-27 |
| D317850 | Funnel | J. Tad Heyman, Laurence M. Bierce | 1991-07-02 |
| D309364 | Salvage drum | J. Tad Heyman, Laurence M. Bierce | 1990-07-17 |
| 4743320 | Method of heat sealing a thermoplastic drum and lid and article of manufacture | — | 1988-05-10 |
| 4708258 | Salvage drum | J. Tad Heyman, Laurence M. Bierce | 1987-11-24 |
| 4586624 | Method and device for heat sealing thermoplastics materials | — | 1986-05-06 |
| 4279422 | Board game involving multiple variables and performance determination | — | 1981-07-21 |