Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457517 | Composite landing collar for cementing operation | Sidney K. Smith, Jr., Paul Zutz, Yusheng Yuan | 2002-10-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457517 | Composite landing collar for cementing operation | Sidney K. Smith, Jr., Paul Zutz, Yusheng Yuan | 2002-10-01 |