Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4495743 | Standing seam roof system | Burlan E. Ellison, Harry P. Spranca | 1985-01-29 |
| 4361998 | Standing seam roof system | Burlan E. Ellison, Harry P. Spranca | 1982-12-07 |
| 4321780 | Snap cap for architectural wall panel | Burlan E. Ellison, Harry P. Spranca | 1982-03-30 |