Electronic apparatus including a device for preventing loss or theft

作者: Hans Jacob Jespersen

DOI:

关键词:

摘要: A mobile telephone includes a control device, which comprises receiver to receive an enabling signal and controller enable operation of the in dependence upon signal. An active badge transmits If are separated is no longer able signal, then disables telephone.

参考文章(17)
Milton E. Wilkinson, Portable cellular alert system ,(1996)
Gene Michael Neyhart, Child proximity monitor and alarm ,(1998)
Steven Jeffrey Goldberg, Object tracking apparatus and method ,(2000)
Robert G. Bresler, Michael R. D'Angelo, Geoffrey M. Eggert, Joseph E. Qualitz, Anti-theft device with alarm screening ,(1999)
Richard G. Pilney, Ronald E. Ham, Proximity alert system ,(1992)
Toyoki Sasakura, Kenichi Miyamoto, Device for prohibiting unauthorized use of electronic devices ,(1997)
Daniel L. Murphy, Edward A. Rosenthal, Portable anti-theft device ,(1992)
William P. Alberth, Robert J. Bero, Proximity monitoring communication system ,(2001)