Position identification system

Details Position identification system Position identification system

1991-07-25

1993-06-22

Ng, Jin F.

Communications: electrical

Vehicle position indication

340989, 340991, 340993, 342457, G08G 1123

Patent

active

052219259

ABSTRACT:
A position identification and navigation system comprising an active transceiver unit for transmitting a request signal, and a network of passive units for transmitting digital location information back to the active unit in response to the request signal. The active unit receives the information signals and displays the location information to assist in position identification, navigation and tracking.

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patent: 4596988 (1986-06-01), Wanka
patent: 4673921 (1987-06-01), Saito et al.
patent: 4797948 (1989-01-01), Milliorn et al.
patent: 4962457 (1990-10-01), Chen et al.

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