Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7121681 | Compact high-brightness fluorescent lamp system | Brian D. Cull, Elias S. Haim, Danny Lee Heath, Jr. | 2006-10-17 |
| 5246236 | Seal for long-time exposures in oil and gas well tools | David D. Szarka | 1993-09-21 |
| 4613159 | Pressure-assisted dynamic seal apparatus | David D. Szarka | 1986-09-23 |
| 4441721 | High temperature packer with low temperature setting capabilities | David D. Szarka | 1984-04-10 |
| 4281840 | High temperature packer element for well bores | — | 1981-08-04 |
| 4254983 | Retriever tool | — | 1981-03-10 |
| 4185689 | Casing bridge plug with push-out pressure equalizer valve | — | 1980-01-29 |