Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9273517 | Downhole closed-loop geosteering methodology | Borislav J. Tchakarov, Tsili Wang, Rodney S. Guenther, Caimu Tang | 2016-03-01 |
| 5220593 | Cellular radiotelephone credit card paystation method | Robert G. Zicker, Daniel Borkowski, Donald A. Plouff, Phillip Brown | 1993-06-15 |
| 5144649 | Cellular radiotelephone credit card paystation method | Robert G. Zicker, Daniel Borkowski, Donald A. Plouff, Phillip Brown | 1992-09-01 |