Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7116760 | System and method for single-ended line analysis for qualification and mapping | David R. Smith, Duane Eareckson, David E. Johnson, Paul Wyar | 2006-10-03 |
| 4679770 | Gate valve for two way flow | — | 1987-07-14 |
| 4297966 | Valve indicator post | — | 1981-11-03 |