Digitally watermarked maps and signs and related navigational tools
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 24, 2007
Grant Date -
Oct 10, 2002
app pub date -
Apr 10, 2001
filing date -
Mar 5, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Maps and signs are embedded with plural-bit data in the form of digital watermarks. In one embodiment, the plural-bit data includes location information with respect to a map. A handheld reading device extracts the location information from the map. The reading device then compares the location information with a physical location of the device. Feedback is provided to help a device user to correlate the map location with the physical location. In another embodiment, signs are watermarked to provide navigational and informational aids. The watermarks may include unique identifiers, which allow database lookup of related information.
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Cited Art Landscape
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