Roll-calling mechanism based vision system for elevator...

Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means – Monitors operational parameter

Reexamination Certificate

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Reexamination Certificate

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07731000

ABSTRACT:
A positioning system having a plurality of transponder modules each located at a known location for receiving an electromagnetic signal and emitting a light signal, at least one transceiver module for emitting an electromagnetic signal and receiving the light signal, and apparatus processing the received light signal to determine a position of the at least one transceiver module.

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German patent application 11 2004 002 766.7-22; Office Action dated Jan. 11, 2008.
English translation of German patent application 11 2004 002 766.7-22; Office Action dated Jan. 11, 2008.

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