Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 2, 2011
Patent Application Number
12381855
Date Filed
March 17, 2009
Patent Citations Received
Patent Primary Examiner
Patent abstract
This document discusses, among other things, a portable device that generates position and orientation data to facilitate movement within a building. The device can be, for example, handheld or affixed to a cane. Data for navigation is derived from reflections from interior surfaces and dead reckoning sensors.
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