Research for multi-national LTE IPR has been done by keyword search for WIPO's PCT applications.
PCT applications published before July 1, 2009 show that the multi-national IPR for LTE innovations is keep increasing as the standardization for LTE is in the final stage and commercial LTE services are scheduled from 2010 in several countries including US and Japan.
Analysis for top 20 LTE innovators shows that InterDigital is the leader followed by Qualcomm, Ericsson, Nokia, and NTT DoCoMo as of June 30, 2009.
As for the distribution of assignees’ country, the US (39%) is the leader followed by Japan (16%) and S. Korea (11%).
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