Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9845656 | Extended length packer with timed setting | Patrick J. Zimmerman, Charles D. Parker, Michael C. Derby | 2017-12-19 |
| 9637997 | Packer having swellable and compressible elements | Michael C. Derby, Charles D. Parker | 2017-05-02 |