Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11143823 | Fiber optic slip ring with through bore | Boying B. Zhang, Hong Zhang | 2021-10-12 |
| 9506804 | Open path gas detector | John H. King | 2016-11-29 |
| 9470084 | Method and apparatus for measuring fluid process variable in a well | Robert C. Hedtke | 2016-10-18 |
| 8085156 | RF cavity-based process fluid sensor | Mark S. Schumacher | 2011-12-27 |
| 7954383 | Method and apparatus for pressure measurement using fill tube | Charles R. Willcox, Robert C. Hedtke | 2011-06-07 |
| 7870791 | Method and apparatus for pressure measurement using quartz crystal | Robert C. Hedtke | 2011-01-18 |
| 7567013 | Vibration power generation | Swapan Chakraborty, John McIntire | 2009-07-28 |