Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881355 | Cold roll-formed structures and method and apparatus for producing same | George F. Bosl, Patrick M. Kelly, Dennis A. Alvarez, Gale E. Sauer | 1989-11-21 |
| 4817357 | Suspension ceiling grid tee | — | 1989-04-04 |