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jan 26, 2010 - #US7652627B2 System for Providing GPS Information Indoors and Method of Acquiring Indoor GPS Information by Mobile Device Inventor: Hyong-uk Choi Status: Active Award Date: 1/26/2010
Added to timeline:
20 Dec 2019
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210
Engineering Patents
Date:
jan 26, 2010
Now
~ 14 years ago