Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9523233 | Swing door | Richard D. Keller, Daniel Keller, William Bakalich | 2016-12-20 |
| 8800208 | Hydraulic cylinder control | Richard D. Keller, Daniel Keller, William Bakalich, Steven Schultz, Fred W. Sauer +1 more | 2014-08-12 |
| 8327586 | Hydraulic cylinder control | Richard D. Keller, Daniel Keller, William Bakalich, Steven Schultz, Fred W. Sauer +1 more | 2012-12-11 |
| 7219711 | Hydraulic door opening mechanism and method of installing a bi-fold door | Richard D. Keller, Daniel Keller, William Bakalich | 2007-05-22 |