Issued Patents 1994
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364110 | Downhole tool metal-to-metal seal | Steven G. Streich, David D. Szarka, Bobby L. Sullaway | 1994-11-15 |
| 5348089 | Method and apparatus for the multiple stage cementing of a casing string in a well | Alan B. Duell, Lee W. Stepp | 1994-09-20 |
| 5314015 | Stage cementer and inflation packer apparatus | Steven G. Streich, Richard L. Giroux, Lee W. Stepp | 1994-05-24 |
| 5299640 | Knife gate valve stage cementer | Steven G. Streich, Charles F. VanBerg, Jr. | 1994-04-05 |
| 5279370 | Mechanical cementing packer collar | Alan B. Duell | 1994-01-18 |