Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11155904 | Cobalt-rich wear resistant alloy and method of making and use thereof | Cong Yue Qiao, David Doll, Heidi Ziegler Doll, Douglas W. Dooley | 2021-10-26 |
| 7754143 | Cobalt-rich wear resistant alloy and method of making and use thereof | Cong Yue Qiao | 2010-07-13 |
| 7216427 | Surface treatment of prefinished valve seat inserts | Todd Trudeau, Cong Yue Qiao, Douglas W. Dooley | 2007-05-15 |
| 6519847 | Surface treatment of prefinished valve seat inserts | Todd Trudeau, Cong Yue Qiao, Douglas W. Dooley | 2003-02-18 |