Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9157902 | Status monitoring system for a fenestration unit | David D. Plummer, Daniel M. Timmerman | 2015-10-13 |
| 8624736 | Status monitoring system for a fenestration unit | David D. Plummer, Daniel M. Timmerman | 2014-01-07 |
| 8549789 | Hidden window retainer system for doors | Kelly Hemping | 2013-10-08 |
| 8269627 | Status monitoring system for a fenestration unit | David D. Plummer, Daniel M. Timmerman | 2012-09-18 |