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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0347139 (1994-11-23) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 73 인용 특허 : 0 |
An alarm signal is triggered in the event of a prohibited approach or removal of people or objects which affords reliable and unobtrusive protection of such people or objects while retaining unhindered mobility. A signal is transmitted by a transmitter 14 which causes the blockage of an alarm signal
A method of protecting people or objects by which an alarm signal is triggered in case of a prohibited approach or removal of people or objects comprising the steps of transmitting a signal, by a transmitter to a receiver determining therefrom a distance signal representative of the distance between
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