Fig. 1: A simplified linear detector circuit of the Bose FM multiplex detector from the patent documents. Fig. 2: John Bose enjoys a hearty meal in the Alpine FM transmitter building in July, 1939.

Security China 2010, the 10th China International Exhibition on Public Safety and Security, will be held in 2 to 5 November in Beijing, China. GKB Security Corporation will take this chance to exhibit ...