Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4547972 | Tilt sensor and monitoring system | Jeffrey C. Heidel, Thomas R. Hoogervorst, Harold L. Swartz | 1985-10-22 |
| 4503622 | Precision inclinometer with digital numerical readout | Harold L. Swartz, Thomas R. Hoogervorst | 1985-03-12 |