Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6279897 | Sheet separator dam | — | 2001-08-28 |
| 5065843 | Method for installing elevator system components | — | 1991-11-19 |
| 5033586 | Construction elevator assembly | Robert C. Anderson, Paul Bennett | 1991-07-23 |