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:
Apr. 21, 2015
Filed:
May. 03, 2007
Yaojun Sun, South Riding, VA (US);
Yaojun Sun, South Riding, VA (US);
Sprint Spectrum L.P., Overland Park, KS (US);
Abstract
A presence service is described that is particularly adapted for use by mobile telecommunications devices. Mobile devices operate as presentities that have one or more watchers. The watchers may themselves be mobile devices. The mobile devices can alternately be in or out of a display state. The display state corresponds to a state in which a user of the mobile device is accessing or is likely to access presence information of a different mobile device. A mobile device reports its state changes to a presence server when it has at least one watcher that is in the display state. If the mobile device has no watchers that are in the display state, and if the mobile device is not itself in the display state and watching other mobile devices, presence state reports from the mobile device are kept to a minimum.