9 Helmets for aircraft and parts therefor, namely, audio headsets, helmet chin straps, helmet pads and helmet liners, equipment for ballistic, industrial and sport helmets, namely, helmet liner suspension systems, helmet chin straps, helmet pads, and helmet liners, equipment for audio headsets, namely, headset headband cushions, headset ear cushions, headset cloth ear cushion covers, headset retaining straps and audio headset cords, electronic noise attenuation apparatus comprising headset and electronic modules, and microphone adapters; computer mouse and keyboard accessories, namely wrist pads, computer cursor control devices, namely, light pens; surveillance imagers and related systems, namely, cameras and video monitors