Tyre pressure monitoring apparatus

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

Reexamination Certificate

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C340S447000, C073S146000

Reexamination Certificate

active

07924147

ABSTRACT:
A tire pressure monitoring system comprises an initiator which is arranged to transmit an initiation signal, and at least one corresponding transducer associated with a tire of the vehicle which responds to exposure of the initiation signal from the initiator and is adapted to respond by transmitting a return signal indicating that it has been woken by the initiator, in which the strength of the initiation signal emitted by the initiator is varied across a number of values within a range.

REFERENCES:
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patent: 6486769 (2002-11-01), McLean
patent: 6879252 (2005-04-01), DeZorzi et al.
patent: 2001/0035815 (2001-11-01), Fletcher et al.
patent: 2004/0135681 (2004-07-01), Tsujita
patent: 2004/0135682 (2004-07-01), Lin
patent: 2004/0183664 (2004-09-01), McClelland et al.
patent: 2004/0246101 (2004-12-01), Cole
patent: 2004/0257202 (2004-12-01), Coughlin et al.
patent: 1 197 356 (2002-01-01), None
patent: WO 02/07993 (2002-01-01), None

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