Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886113 | Positive indication shear ring | Frank Giusti, Jr., James D. Hendrickson | 1989-12-12 |
| 4844154 | Well packer | Pat M. White | 1989-07-04 |
| 4840229 | Multiple position service seal unit with positive position indicating means | Lewis D. Proctor, Brian P. Manzi, Frank Giusti, Jr. | 1989-06-20 |
| 4834175 | Hydraulic versa-trieve packer | Pat M. White | 1989-05-30 |