Complex sentence: Iron Wind Metals continued to use the name Ral Partha to describe archived designs, but the website and Ral Partha trademark remained the property of Wizkids which underwent a series of acquisitions.
Split into simpler sentences: Iron Wind Metals continued to use the name Ral Partha to describe archived designs. However, the website and Ral Partha trademark remained the property of Wizkids which underwent a series of acquisitions.