| http://www.w3.org/ns/prov#value | - 0Aug 30, 1994French State, represented by the Minister of the Post, Telecommunications and Space, (Centre National d'Etudes des Telecommunications)Device for processing echo, particularly acoustic echo in a telephone lineUS5353348 *May 14, 1993Oct 4, 1994Jrc International, Inc.Double echo cancelling systemUS5365583 *Sep 11, 1992Nov 15, 1994Polycom, Inc.Method for fail-safe operation in a speaker p
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