최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0250259 (1994-05-27) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 488 인용 특허 : 0 |
A locator device for monitoring the location of subjects, usable in conjunction with a database system connected to a wireless network, wherein the database system causes a polling signal to be sent periodically to each of the subject\s locator devices in the area. The locator device includes a wire
A locator device for monitoring the location of subjects, usable in conjunction with a database system connected to a wireless network, wherein the database system causes a polling signal to be sent periodically to each of the subject\s locator devices in the area. The locator device includes a wireless transceiver to receive the polling message and, in response, query a location determination device for the current location of the device. This location is then sent back through the wireless network to the database. The database determines from a record on that particular subject where that subject is supposed to be at that time. If the subject being monitored is not within the area where he or she is supposed to be, then the database may automatically contact law enforcement officials.
An apparatus usable in a wireless communications system, said apparatus responsive to a message from said wireless communications system for determining its own spatial coordinates and conveying said spatial coordinates via said wireless communications system to a central database, said apparatus co
An apparatus usable in a wireless communications system, said apparatus responsive to a message from said wireless communications system for determining its own spatial coordinates and conveying said spatial coordinates via said wireless communications system to a central database, said apparatus comprising: position determining means for determining said spatial coordinates of said apparatus; communications means for communicating with said wireless communications system; and central processing means responsive to receipt of said message from said wireless system for causing said position determination means to determine said spatial coordinates and delivering said spatial coordinates to said communications means for transmission of said spatial coordinates to said wireless system.
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