Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842895 | Method of treating a core | Harold T. Fields | 1989-06-27 |
DC
Delmar E. Crawford
Overall (1989): #121,080 of 140,708Top 90%
1
Patents 1989