Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847445 | Zirconium thin-film metal conductor systems | Robert E. Holmes, Robert R. Zimmerman | 1989-07-11 |
EH
Earl R. Helderman
Overall (1989): #118,491 of 140,708Top 85%
1
Patents 1989