Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5656389 | Electrochemical cell | Rüdiger Walz, Freddy Helmer-Metzmann | 1997-08-12 |
KT
Karl-Heinz Tetzlaff
Overall (1997): #121,537 of 185,788Top 70%
1
Patents 1997