Communications – electrical: acoustic wave systems and devices – Underwater system
Reexamination Certificate
2007-03-06
2007-03-06
Pihulic, Dan (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Underwater system
Reexamination Certificate
active
11090943
ABSTRACT:
An exemplary apparatus includes one or more “communicators” that are worn, carried by, or otherwise associated with a person or location in an environment. Each communicator includes a synchronizable clock and a transmitter configured to transmit a message including a respective time stamp that is based on a time determined by the synchronizable clock. The message can be transmitted acoustically or in another manner such as by RF signal, optical signal, etc. The clock can be synchronized based on, e.g., a standard clock, another synchronizable clock associated with one or more transceivers, or a selected transceiver. The time stamp can be digital or analog, and can be configured to permit estimation of distance and bearing between synchronized communicators.
REFERENCES:
patent: 2002/0155845 (2002-10-01), Martorana
patent: 0 508 819 (1992-10-01), None
patent: 0 933 961 (1999-08-01), None
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patent: WO 00/64208 (2000-10-01), None
Klarquist & Sparkman, LLP
Pihulic Dan
University of Victoria Innovation and Development Corporation
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