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. 02, 2010
Filed:
Feb. 23, 2007
Hao-hua Chu, Taipei, TW;
Shun-yuan Yeh, Taipei, TW;
Chon-in Wu, Taipei, TW;
Kenji Okuda, Taipei, TW;
Hao-Hua Chu, Taipei, TW;
Shun-Yuan Yeh, Taipei, TW;
Chon-In Wu, Taipei, TW;
Kenji Okuda, Taipei, TW;
National Taiwan University, Taipei, TW;
Abstract
A footprint location system installed on footwear is disclosed. A user simply has to wear the shoes to track his/her locations without any setup or calibration efforts. The footprint location system measures and tracks the displacement vectors along a trail of footprints. The position of a user can be determined by summing up the current and all previous displacement vectors. In addition to being infrastructure-free, the footprint location method does not have problems found in existing indoor location systems, such as obstacles, multi-path effects, signal noises, signal interferences, and dead spots.