sp3, Inc. has received a third patent regarding smooth diamond film processes and products. Patent #6,533,831 covers all cutting tools incorporating smooth fine grain diamond surfaces that have larger grained material beneath the surface. The patent relates to the issue of creating ultra-fine grain surfaces that promote improved surface finishes for cutting tools. "This patent solidifies sp3's leadership role in diamond coating technology," said Jim Herlinger, CEO. "While others talk about such capabilities, we have acquired patents that recognize our early innovative work in this difficult technical field."