Invention Grant
US09230417B2 Alert devices and systems 有权
警报设备和系统

Alert devices and systems
Abstract:
Wireless communication devices and systems are disclosed which provides for simple yet effective communications between co-workers in areas of high ambient noise. Devices are provided which are operable to use vibration to provide an alert to a wearer of the device, the device including a transmitter/receiver unit, a transmit button operably connected to the transmitter/receiver unit and at least one vibration device operably connected to the transmitter/receiver unit. The device may be positioned inside or on a hard hat or other headgear of a worker.
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