Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6620243 | Fluidized bed powder handling and coating apparatus and methods | Christopher P. Bertellotti, Colin Drummond, Joseph Rogari, Don Urig | 2003-09-16 |
| 5162711 | Elevator door control responsive to obstructions | — | 1992-11-10 |
| 4793442 | Method and apparatus for providing pre-travel balancing energy to an elevator drive | Larry V. Birney | 1988-12-27 |