Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375658 | Shut-in tools and method | Roger L. Schultz, Craig L. Zitterich, Harold Kent Beck | 1994-12-27 |
| 5332035 | Shut-in tools | Roger L. Schultz, Craig L. Zitterich, Harold Kent Beck | 1994-07-26 |
| 5329811 | Downhole fluid property measurement tool | Roger L. Schultz | 1994-07-19 |
| 5279363 | Shut-in tools | Roger L. Schultz, Craig L. Zitterich, Harold Kent Beck | 1994-01-18 |
| 5234057 | Shut-in tools | Roger L. Schultz, Craig L. Zitterich, Harold Kent Beck | 1993-08-10 |
| 5149984 | Electric power supply for use downhole | Roger L. Schultz, Kevin R. Manke, Neal G. Skinner, Allen R. Young | 1992-09-22 |