Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5402677 | Method of determining drillstring bottom hole assembly vibrations | Yih-Min Jan | 1995-04-04 |
| 5313829 | Method of determining drillstring bottom hole assembly vibrations | Yih-Min Jan | 1994-05-24 |