79092060
Aug 27, 2010
Dec 13, 2011
Technical aids for the hearing impaired, namely, assistive listening devices and systems comprised of sound emitters, namely, sound alarms and sound amplifiers; light source, namely, light emitting diodes, light and sound detectors as well as receivers and transmitters; public address systems; loud speaker systems and sound systems comprised of wireless amplifiers, transmitters and speakers
Electrical and Scientific Apparatus