Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696345 | Hasdrive with multiple offset producers | — | 1987-09-29 |
| 4360234 | In-situ method and apparatus for sparging gas bubbles | Robert A. Hard, Donald H. Davidson, Ray V. Huff | 1982-11-23 |