Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826404 | Tone signalling with TFO communication links | Eckhard Delfs, Rudolf Hoffmann, Emilian Ertel | 2004-11-30 |
KH
Karl Hellwig
Overall (2004): #182,632 of 270,089Top 70%
1
Patents 2004