Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842072 | Sand consolidation methods | Robert H. Friedman | 1989-06-27 |
| 4817720 | Method for forming a barrier to fluid flow in an oil formation adjacent to a producing oil well | Robert H. Friedman | 1989-04-04 |
| 4800960 | Consolidatable gravel pack method | Robert H. Friedman | 1989-01-31 |