Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846281 | Dual flapper valve assembly | Sammy R. Clary, Frank Giusti, Jr. | 1989-07-11 |
| 4832129 | Multi-position tool and method for running and setting a packer | Frank Giusti, Jr., Carter R. Young, John B. Wilkie, Jr. | 1989-05-23 |
| 4813481 | Expendable flapper valve | Frank Giusti, Jr., Richard L. Grant, Kennedy J. Brown | 1989-03-21 |