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:
Mar. 18, 2008
Filed:
Oct. 20, 2004
Applicant:
Yong-wook Kim, Suwon-si, KR;
Inventor:
Yong-Wook Kim, Suwon-si, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 19/06 (2006.01); G06K 7/08 (2006.01); H04J 1/00 (2006.01); H04J 9/00 (2006.01); H04L 5/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
An IC card system for transceiving data signal between an IC card processor and an IC card in the manner of non-contact are provided. The IC card modulates the signal to be transmitted to the processor in the manner of Quadrature Amplitude Modulation and generates the modulated signal. A card reader demodulates the signal received from the IC card in the manner of QAM. The rate of the data signal transmitted from the IC card to the card reader is improved.