Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7819198 | Friction spring release mechanism | John M. Birckhead | 2010-10-26 |
| 7195033 | Method and system for determining and controlling position of valve | Richard M. Wilde, John L. Maida | 2007-03-27 |
| 7000698 | Methods and systems for optical endpoint detection of a sliding sleeve valve | Richard M. Wilde | 2006-02-21 |