The patents that Samsung said Apple has infringed include U.S. patent numbers 7,756,087; 7,551,596; 7,672,470; 7,577,757; 7,232,058; 6,292,179; 6,226,449 and 5,579,239, which can be viewed by searching the U.S. Patent and Trademark Office .

The South Korean company and its U.S. subsidiaries said that it has in its portfolio 30,665 U.S. patents, including 6,238 in the telecommunications field, as of April 18.

Two of the patents are FRAND-pledged patents that Samsung declared essential to European Telecommunications Standards Institute (ETSI) standards, said patent analyst Florian Mueller in a blog post. FRAND (fair, reasonable, and non-discriminatory) licenses allow companies to develop open standards by sharing information and technology.

Samsung and Apple are involved in litigation in many countries.

The IDG News Service