Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5472248 | Surface/cremone bolt | — | 1995-12-05 |
| 5236235 | Concealed screw rose mounting system | Ronald E. Gustafson, Robert J. Hartzell, Robert John Carlson | 1993-08-17 |
| 4189804 | Back plate and bail assembly | — | 1980-02-26 |