77820785
Sep 4, 2009
Apr 26, 2011
Audio and communication devices for improving acoustic clarity and audio transmission and reception for assisting persons with sensory or cognitive impairments and to preserve hearing levels, namely, wired and wireless adapted headphones and headsets for use in audio, cellular voice over internet protocol and telecommunications; and noise cancelling microphones for improving acoustic clarity and audio transmission and reception for assisting persons with sensory or cognitive impairments and to preserve hearing levels
Electrical and Scientific Apparatus