Patent offices in Korea and Europe have upheld three digital wireless technology patents belonging to
in proceedings initiated by
All three patents involved code division multiple access, or CDMA, technology used in mobile phones to transmit data and overcome problems with fading and interference.
Qualcomm said in a press release that the Korean Intellectual Property Office and the European Patent Office invalidated all of Motorola's claims on the patents. Motorola isn't the first to question Qualcomm's patents in court. Other telecom companies, including
, have also challenged Qualcomm's mobile phone technology.
In another patent matter, Qualcomm unit
received a U.S. patent that describes a way to use a computer network to locate a wireless device.
Near the end of the trading day, Qualcomm was up $3, or 4%, to $78.50 on the
. At the
New York Stock Exchange
, Motorola was unchanged at $23.50.