Patent 7285057 was granted and assigned to Taylormade-Adidas Golf Company on October, 2007 by the United States Patent and Trademark Office.
A golf club head having a toe portion, a heal portion and a club front intended striking face with a plurality of substantially parallel grooves formed in the face and extending horizontally between the toe portion and the heel portion. Each groove has a groove width such that the groove width increases from a center portion of the face towards the toe portion and the heel portion.