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:
Jul. 19, 2011
Filed:
Oct. 28, 2009
Tong Zhou, Overland Park, KS (US);
Debashis Haldar, Olathe, KS (US);
Baoquan Zhang, Overland Park, KS (US);
Tong Zhou, Overland Park, KS (US);
Debashis Haldar, Olathe, KS (US);
Baoquan Zhang, Overland Park, KS (US);
Sprint Spectrum L.P., Overland Park, KS (US);
Abstract
Users of the system are each provided with an indicator module capable of presenting a display. An authorization module keeps track of which users are authorized to access a facility, such as a secured area or a parking facility. The authorization module sends messages, such as SMS messages, to the authorized indicator modules directing them to present a common valid display. The common valid display changes repeatedly over time, but, at any one time, the modules of authorized users all present the same display. A user may be granted or denied access based on whether the display on his module is the same as that of known authorized modules.