US

Ullrich Sigwanz

SA Sonova Ag: 16 patents #5 of 295Top 2%
SG Siemens Audiologische Technik Gmbh: 9 patents #12 of 180Top 7%
SA Siemens Aktiengesellschaft: 2 patents #6,658 of 22,248Top 30%
Overall (All Time): #136,277 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #TitleCo-InventorsDate
6047074 Programmable hearing aid operable in a mode for tinnitus therapy Fred Zoels, Inga Holube, Raimund Martin 2000-04-04
5838806 Method and circuit for processing data, particularly signal data in a digital programmable hearing aid Fred Zoels 1998-11-17
5144674 Digital programming device for hearing aids Wolfram Meyer, Eduard Kaiser, Soeren Larsen 1992-09-01