Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D297137 | Telephone set | Ludwig Richter, Dieter Kraemer, Helmut Mayer, Hajo von Reyer, Wolfgang Girscher +1 more | 1988-08-09 |
| D294351 | Telephone set | Ludwig Richter, Dieter Kraemer, Helmut Mayer, Hajo von Reyer, Wolfgang Girscher +1 more | 1988-02-23 |
| D294248 | Telephone set | Ludwig Richter, Dieter Kraemer, Helmut Mayer, Hajo von Reyer, Wolfgang Girscher +1 more | 1988-02-16 |