P
PatentIndex
Search
Landscape
Sign in
Inventor
GYSEL PETER
CH
2 patents
Patents
2 patents
US5633863A
May 27, 1997
Echo canceler
SIEMENS SCHWEIZ AG
81 citations
92
US5649010A
Jul 15, 1997
Send filter for an echo canceler
SIEMENS SCHWEIZ AG
34 citations
89