Searching Patents Protecting ETSI Telecommunication Standards

ETSI provides a tool to search for patents protecting each of the ETSI standards based on declarations made by companies.

Link to the Database and Tool --> http://ipr.etsi.org/

This is a great tool as you get the patents covering each technology including the basic patents for each technology as per the telecom standard and also the competing companies.

However, this information and the relevancy of patents is not verified by ETSI.