Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2007-01-16
2007-01-16
Anderson, Matthew D. (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S041200, C455S456100, C455S421000
Reexamination Certificate
active
11026751
ABSTRACT:
A mobile communication device (214) in a communication system (200) initiates a call over the fixed equipment network of the communication system to another mobile communication device (216). If the two mobile communication devices are within sufficient proximity to each other, they may switch to a direct mode of communication. (318). The direct mode and network mode of communication are in different frequency bands using different air interface protocols.
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patent: 5666661 (1997-09-01), Grube et al.
patent: 5983099 (1999-11-01), Yao et al.
patent: 6226524 (2001-05-01), Allen et al.
patent: 2003/0013471 (2003-01-01), Vilmur et al.
patent: 2004/0110531 (2004-06-01), Sanchez
Dubin Sherry Easter
Korneluk Jose E.
Patel Swetal A.
Rodrigues Anthony
Walsh James T.
Anderson Matthew D.
Garrett Scott M.
Motorola Inc.
Sobutka Philip J.
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