Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8710970 | Signal apparatus for facilitating safe backup of vehicles | Christopher L. Oelrich | 2014-04-29 |
| 8013720 | Signal apparatus for facilitating safe backup of vehicles | Christopher L. Oelrich | 2011-09-06 |
| 7777617 | Wireless signal apparatus for assisting drivers to back large vehicles | Christopher L. Oelrich | 2010-08-17 |
| 7567167 | Wireless signal apparatus for assisting drivers to back large vehicles | Christopher L. Oelrich | 2009-07-28 |