Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5544450 | Double-hung tilting sash type window system | Melvin J. Schmidt, Thomas P. Coach, Glenn C. Hause, Dennis A. Galowitz, James P. Wyman +2 more | 1996-08-13 |
| 5243783 | Locking slide block | Melvin J. Schmidt | 1993-09-14 |