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:
Feb. 01, 2005
Filed:
May. 25, 2001
Applicants:
Ching-chuan Chao, Sang Chung, TW;
Chih-an Chen, Taipei, TW;
Inventors:
Ching-Chuan Chao, Sang Chung, TW;
Chih-An Chen, Taipei, TW;
Assignee:
AIPTEK International Inc., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 500 ; G06K 1106 ;
U.S. Cl.
CPC ...
Abstract
An antenna loop structure applicable to a digitizer tablet is capable of reducing effect of electromagnetic interference (EMI) by aggregating a plurality of antenna loops, wherein each antenna loop further comprises a plurality of-shaped segmental antennas, and each pair of immediate neighboring segmental antennas is phase-inverted to each other for counteracting against external EMI.