Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847309 | Method for making foundry sand containing a resin binder | Wolfgang Klesse, Heinz Auer | 1989-07-11 |
PQ
Peter Quis
Overall (1989): #69,394 of 140,708Top 50%
1
Patents 1989