Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843308 | Electronic integrator circuitry for piezoelectric and other sensors | — | 1989-06-27 |
| 4814661 | Systems for measurement and analysis of forces exerted during human locomotion | Marc H. Ratzlaff, Barrie D. Grant | 1989-03-21 |