Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D307742 | Electric plug with circuit breaker | Carlyle Serr, Lawrence E. Pierce | 1990-05-08 |
| D307743 | Slide switch | Lawrence E. Pierce, Paul C. DeKleine, Robert Shaw | 1990-05-08 |
| 4771367 | Electric plug with circuit breaker | Carlyle Serr, Lawrence E. Pierce | 1988-09-13 |