Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu LtdfiledCriticalFujitsu Ltd
Priority to JP21475587ApriorityCriticalpatent/JPH0787416B2/en
Publication of JPS6458132ApublicationCriticalpatent/JPS6458132A/en
Publication of JPH0787416B2publicationCriticalpatent/JPH0787416B2/en
A proximity switch, a target, a system of such proximity switches and targets, and a method of determining the presence of a target by a proximity switch
Method of transmitting messages with predetermined message duration from batteryless transponders to interrogation devices circuit of a radio transmitter-receiver