Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5757273 | Multifunctional personal alert safety system | Mark A. Crandall, Mats Lundberg | 1998-05-26 |
| 5278414 | Optical motion and angular position sensing method and sensor | Mark A. Crandall | 1994-01-11 |