Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889773 | Resistance welding of galvanized steel | Donald H. Campbell | 1989-12-26 |
| 4828614 | Ferrophosphorous composition having improved conductivity and passivation resistance | George T. Miller | 1989-05-09 |