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:
Jan. 02, 2007
Filed:
Sep. 29, 2004
Applicants:
Woong Kwon, Gyeonggi-do, KR;
Kyung-shik Roh, Gyeonggi-do, KR;
Woo-sup Han, Gyeonggi-do, KR;
Young-bo Shim, Seoul, KR;
Inventors:
Woong Kwon, Gyeonggi-do, KR;
Kyung-shik Roh, Gyeonggi-do, KR;
Woo-sup Han, Gyeonggi-do, KR;
Young-bo Shim, Seoul, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 17/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided a method and apparatus for using a magnetic field. The method includes: measuring and storing magnetic field data indicating magnitudes of a magnetic field in different directions at each time by rotating sensors over a space; and checking whether a disturbance of the magnetic field exists, using curve fitting parameters such as amplitude and offset of at least one of magnetic field trajectories formed by the stored magnetic field data.