Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6498768 | Method and apparatus for marine seismic surveying including multiples streamers from a lead-in | Einar Gjestrum, Martin Howlid | 2002-12-24 |
| 5852587 | Method of and apparatus for sonic logging while drilling a borehole traversing an earth formation | Sergio Kostek, Shu-Kong Chang, Thomas J. Plona, Curtis Randall | 1998-12-22 |
| 5796677 | Method of sonic logging while drilling a borehole traversing an earth formation | Sergio Kostek, Shu-Kong Chang, Thomas J. Plona, Curtis Randall, Jean Pierre Masson +2 more | 1998-08-18 |
| 4312898 | Process for making magnetic tape | — | 1982-01-26 |
| 4242954 | Calendar roll system | — | 1981-01-06 |