Issued Patents 2016
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9476259 | System and method for leg retention on hybrid bits | Floyd C. Felderhoff, Rudolf Carl Pessier | 2016-10-25 |
| 9249629 | Enhanced backup ring edge features for metal face seal in roller cone drill bits | Chih Lin, Terry J. Koltermann, Anton F. Zahradnik | 2016-02-02 |