Complex sentence: Masters' other patent was the process of making hats and bonnets out of straw and palmetto leaves which was also used to create many weaved goods such as baskets, matting and covers for furniture.
Split into simpler sentences: Masters' other patent was the process of making hats and bonnets out of straw and palmetto leaves. That process was also used to create many weaved goods such as baskets, matting and covers for furniture.