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:
Oct. 20, 2020
Filed:
Aug. 31, 2017
Applicant:
Apple Inc., Cupertino, CA (US);
Inventor:
Manoj K. Bhattacharyya, Cupertino, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 33/02 (2006.01); G01R 33/00 (2006.01); G01D 5/20 (2006.01); G01B 7/008 (2006.01); G01B 7/14 (2006.01); G01B 7/30 (2006.01); G01D 5/14 (2006.01);
U.S. Cl.
CPC ...
G01R 33/02 (2013.01); G01B 7/008 (2013.01); G01B 7/14 (2013.01); G01B 7/30 (2013.01); G01D 5/145 (2013.01); G01D 5/2013 (2013.01); G01R 33/0017 (2013.01); G01R 33/0023 (2013.01); G01R 33/0082 (2013.01);
Abstract
In an embodiment, a method comprises: obtaining, by a sensing device on a ferromagnetic surface, a first magnetometer reading of magnetic flux density modified by the ferromagnetic surface in a first direction; obtaining, by the sensing device, a second magnetometer reading of magnetic flux density modified by the ferromagnetic surface in a second direction; obtaining, by the sensing device, sensitivity terms based on the first and second magnetometer readings; and storing, by the sensing device, the sensitivity terms and a location of the sensing device on the ferromagnetic surface.