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:
Aug. 17, 2010
Filed:
May. 26, 2006
Go Ono, Kokubunji, JP;
Kazuma Yumoto, Fuchu, JP;
Hiroshi Kodaka, Chigasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A wireless IP telephone system including a dynamic address lease server for leasing an IP address to each of terminals and a controller. The controller has information about the IP address, a SIP URI of the terminal, a type thereof, and a function thereof. The information of the controller is dynamically set by a system administrator who manually sets the information or by the dynamic address lease server and the controller which are cooperated. The controller decides an effective period of the address to be leased to each terminal, informs the dynamic address lease server of the fact, and requires the address lease server to release the address which became unnecessary.