Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7922420 | Barriers with kiss-offs | Marc E. Christensen, Greg H. Brown, David E. Cowan, Bryan D. Grabowski, Charles M. Mettler +1 more | 2011-04-12 |
| 7588387 | Barriers with interlocking sides | Marc E. Christensen, Greg H. Brown, David E. Cowan, Bryan D. Grabowski, Charles M. Mettler +1 more | 2009-09-15 |
| D533281 | Barrier with interlocking sides | Marc E. Christensen, Greg H. Brown, David E. Cowan, Bryan D. Grabowski, Charles M. Mettler +1 more | 2006-12-05 |