Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8331918 | Redirecting of calls to avoid network interworking between fixed network and radio communications network | Jörg Schirrwitz | 2012-12-11 |
| 7164754 | Control of access for telephone service providers using voice recognition | Marian Trinkel, Christel Mueller | 2007-01-16 |
| 4474554 | Process and an apparatus for evening out the temperatures within the preheating zone of a kiln | — | 1984-10-02 |