Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826404 | Tone signalling with TFO communication links | Karl Hellwig, Rudolf Hoffmann, Emilian Ertel | 2004-11-30 |
ED
Eckhard Delfs
Overall (2004): #230,463 of 270,089Top 90%
1
Patents 2004