The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2020
Filed:
May. 25, 2016
Applicant:
Wisconsin Alumni Research Foundation, Madison, WI (US);
Inventors:
Xinyu Zhang, Madison, WI (US);
Chi Zhang, Madison, WI (US);
Assignee:
Wisconsin Alumni Research Foundation, Madison, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/116 (2013.01); H04W 4/024 (2018.01); H04W 4/02 (2018.01); H04B 10/114 (2013.01);
U.S. Cl.
CPC ...
H04B 10/116 (2013.01); H04W 4/02 (2013.01); H04W 4/024 (2018.02); H04B 10/1141 (2013.01);
Abstract
A system for identifying the location of the mobile device uses standard fluorescent light fixtures commonly found in indoor environments and detects minor variations in the light output of those fixtures caused by normal manufacturing variation. These variations are catalogued as identifying fingerprints together with location of the light fixtures to provide for navigation.