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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0543365 (1975-01-23) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 119 인용 특허 : 0 |
In a system for wireless staff location where non-coded acknowledgement signals are transmitted from a called staff locator to identify the staff locator from which the acknowledgement signal is sent which is characterized by the fact that the acknowledgement signal is allotted to the staff locator
In a system having a central station including means for repeatedly and cyclically transmitting coded call signals and a number of substations each including means for selectively receiving the coded call signals, an alarm emitter, a manually actuated acknowledgement means and an acknowledgement tra
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