Video cameras; electronic switchers for video signals; video and audio/visual systems and components, namely, audio microphone mixers and systems that capture, transmit, or record video and audio during meetings or presentations comprised of cameras, microphones, cables and digital video recorders; video and audio/visual system controllers, namely, electrical controllers that power on/off, select audio/video sources for, or operate indirectly, video cameras, electronic switchers, audiovisual ...