Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870794 | Clip for outwardly opening C-stud | — | 1989-10-03 |
| 4845904 | C-stud and wedged bracket | — | 1989-07-11 |
| 4843771 | Wall trim member | Robert M. Chapman | 1989-07-04 |
| 4843784 | Integral wallboard and stud | Richard P. Weir, Robert M. Chapman | 1989-07-04 |
| 4837988 | Universal secondary stud | Richard P. Weir | 1989-06-13 |
| 4811539 | Wall framing system | — | 1989-03-14 |
| 4802321 | Sag resistant ceiling panel | — | 1989-02-07 |
| 4800695 | Electrical raceway floor track | — | 1989-01-31 |
| 4796396 | Integral wallboard and stud | — | 1989-01-10 |