Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322171 | Dispenser apparatus | John R. Pingelton, Gary RICHARDSON | 1994-06-21 |
| 4247403 | Method of sealing pores, and lost circulation additive therefor | Kevin Foley, David I. B. VanderHooven | 1981-01-27 |