Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5339895 | Sintered spherical plastic bead prepack screen aggregate | James E. Spangler | 1994-08-23 |
| 5318119 | Method and apparatus for attaching well screens to base pipe | William M. Lowry, James E. Spangler | 1994-06-07 |
| 5310000 | Foil wrapped base pipe for sand control | Holley M. Cornette | 1994-05-10 |
| 5293935 | Sintered metal substitute for prepack screen aggregate | James E. Spangler | 1994-03-15 |