Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4991654 | Casing valve | John T. Brandell, David D. Szarka | 1991-02-12 |
| 4949788 | Well completions using casing valves | David D. Szarka, John T. Brandell, Steven L. Schwegman | 1990-08-21 |
| 4789271 | Remote fluid transfer system and method for sub-sea baseplates and templates | Lloyd C. Knox, Gary D. Zunkel | 1988-12-06 |
| 4624316 | Super seal valve with mechanically retained seal | Morris G. Baldridge | 1986-11-25 |
| 4337010 | Inflatable grout seal | Harold O. Treece | 1982-06-29 |
| 4320992 | Grout distribution system | Morris G. Baldridge, Lloyd C. Knox | 1982-03-23 |
| 4275974 | Inflation and grout system | Lloyd C. Knox | 1981-06-30 |
| 4249576 | Retrievable plug for offshore platforms having shear type retaining means | Steven G. Streich, L. Carter Knox | 1981-02-10 |
| 4230424 | Leg closure | — | 1980-10-28 |
| 4220422 | Leg closure | — | 1980-09-02 |
| 4184515 | Retrievable plug for offshore platforms having shear type retaining means | Steven G. Streich, Lloyd C. Knox | 1980-01-22 |