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. 29, 2019
Filed:
Jan. 13, 2018
Applicant:
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Inventors:
Hung-Yu Wu, New Taipei, TW;
Chin-Hai Hsu, New Taipei, TW;
Assignee:
HON HAI PRECISION INDUSTRY CO., LTD., New Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 29/08 (2006.01); H01F 7/02 (2006.01); H04R 1/00 (2006.01);
U.S. Cl.
CPC ...
G01R 29/0878 (2013.01); H01F 7/0289 (2013.01); H04R 1/00 (2013.01);
Abstract
An electromagnetic sensor includes a first magnetic pack unit and a first magnetic unit. The first magnetic unit forms a first magnetic pack, a second magnetic pack, and a third magnetic pack in a first direction. The structure of the electromagnetic sensor enables even and uniform distribution of the magnetic field on the electrode and provides a good sound effect under different frequencies.