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Proximity detecting apparatus 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G08B-013/14
출원번호 US-0453271 (1989-12-18)
발명자 / 주소
  • Geiszler Theodore D. (Los Gatos CA) Lindseth Dale (San Martin CA)
출원인 / 주소
  • Indala Corporation (San Jose CA 02)
인용정보 피인용 횟수 : 140  인용 특허 : 0

초록 ▼

A proximity detection system which combines the advantages of an electrostatic (electric) field coupling mechanism with those of an electromagnetic coupling mechanism in order to overcome the disadvantages of the respective individual coupling mechanisms. The system includes a coded tag which is exc

대표청구항 ▼

A remotely powered batteryless portable device having circuitry for storing and transmitting coded information comprising: a memory in which coded information is stored; electromagnetic coupling means for receiving electromagnetic radiation of a first predetermined frequency; power means connected t

이 특허를 인용한 특허 (140)

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