Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5263550 | Railing for portable staging | Michael D. Jines | 1993-11-23 |
| 4768617 | Adjustable stairway having retractable wheel carriage | John E. Mason, Herman A. Clausen, Gary Lurken | 1988-09-06 |