For two days in late May, Apple CEO Tim Cook and Samsung CEO Gee-Sung Choi met with a judge in the U.S. District Court of Northern California in an attempt to reach a settlement in a high-profile U.S. patent case, the Los Angeles Times reports.

Back in April 2011, Apple filed a lawsuit accusing Samsung of copying the “look and feel” of the iPhone when the Korean company created its Galaxy line of phones. Samsung countersued Apple for not paying royalties for using its wireless transmission technology. Since then, the number of patents under dispute has skyrocketed, according to the Korea Times, as has the number of courts involved in various countries. The two companies have repeatedly accused each other of copying the appearance and functions of their smartphones and tablet devices.