Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10137914 | Train safety warning system | — | 2018-11-27 |
| 4277961 | Security lock nut assembly for padlocks | — | 1981-07-14 |
| 4272760 | Self-calibrating digital to analog conversion system and method | Paul R. Prazak | 1981-06-09 |