NEW YORK (AP) – Patent holding company Klausner Technologies Inc. said Wednesday it has sued Cisco Systems Inc. and Avaya Inc. for infringement on a visual voicemail patent.
The suit has been filed in federal court in Texas by the law firm of Dovel & Luner, Klausner said.
It's not the first such lawsuit for Klausner, which last year settled with Apple Inc. and AT&T Inc. over the same issue. Judah Klausner said at the time that Apple and AT&T have agreed to take out licenses on the technology, joining eBay Inc.'s Skype division.
On Apple's iPhone, the visual voicemail feature lets users see a list of people who've left them phone messages and listen to the messages in any order they choose.
In all, Klausner said it has 24 visual voicemail patent licensees. Others include Verizon Wireless and Citrix Systems Inc.
Avaya declined to comment. A representative for Cisco could not immediately be reached for comment Wednesday afternoon.