Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304514 | Communion cup | Earle L. Hinton | 1989-11-07 |
| 4854368 | Lost foam casting method | — | 1989-08-08 |
| 4819517 | Selected bearing couple for a rock bit journal and method for making same | — | 1989-04-11 |