Complex sentence: In particular, Apple Inc. patented some of the hinting algorithms for TrueType, requiring open source alternatives such as FreeType to use different algorithms until Apple's TrueType hinting patents expired in May 2010.
Split into simpler sentences: In particular, Apple Inc. patented some of the hinting algorithms for TrueType, requiring open source alternatives such as FreeType to use different algorithms. However, Apple's TrueType hinting patents expired in May 2010.