Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5852587 | Method of and apparatus for sonic logging while drilling a borehole traversing an earth formation | Sergio Kostek, Shu-Kong Chang, Gordon McDaniel, Thomas J. Plona | 1998-12-22 |
| 5796677 | Method of sonic logging while drilling a borehole traversing an earth formation | Sergio Kostek, Shu-Kong Chang, Gordon McDaniel, Thomas J. Plona, Jean Pierre Masson +2 more | 1998-08-18 |
| 4928269 | Determining impedance of material behind a casing in a borehole | Christopher Kimball, Fred E. Stanke, Andrew Hayman | 1990-05-22 |