Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802534 | Method and device for manipulating ferrofluids for use in cementing wells | David B. Larson | 1989-02-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802534 | Method and device for manipulating ferrofluids for use in cementing wells | David B. Larson | 1989-02-07 |