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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0138404 (1980-04-08) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 5 인용 특허 : 3 |
A quasi-stationary electric field is produced by a field wire which is insulated from ground and extends along a portion of the perimeter to be protected substantially parallel to ground, and which is connected to the output of an oscillator producing an output signal whose wavelength is very long c
An intrusion warning system for protecting at least a portion of the perimeter of a given area comprising in combination: means for producing a quasi-stationary electric field including a field wire insulated from ground and extending along the portion of the perimeter to be protected substantially
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