Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5564529 | Elevator car frame and platform assembly | Richard J. Ericson, Minglun Qiu | 1996-10-15 |
| 5492201 | Method and apparatus for installing and balancing an elevator car | Richard J. Ericson, Minglun Qiu | 1996-02-20 |
| 5325937 | Elevator platform isolation | Minglun Qiu | 1994-07-05 |