Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795571 | Purification of frozen crystal layers | Bernhard Holzknecht, Hugo Fuchs, Klaus Wintermantel, Peter Thoma | 1989-01-03 |
EH
Eckhard Hetzel
Overall (1989): #118,387 of 140,708Top 85%
1
Patents 1989