GE controlled the patent, not Bill. He was also very happy when the patent expired. I would also argue whether it was obvious or not. At the time it was develo

GE controlled the patent, not Bill. He was also very happy when the patent expired. I would also argue whether it was obvious or not. At the time it was developed, not that many people were doing surface reconstruction of volumetric data. Bill and Harvey came up with Marching and Dividing Cubes to support GE Medical.