Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5236235 | Concealed screw rose mounting system | Robert J. Hartzell, Robert John Carlson, Dale L. Flowerday | 1993-08-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5236235 | Concealed screw rose mounting system | Robert J. Hartzell, Robert John Carlson, Dale L. Flowerday | 1993-08-17 |