"PC World" quotes Center for Internet and Society Resident Fellow David Olson in an article about Microsoft's patent claims against open-source software companies:

"But Microsoft may have more difficulty defending its patents because of an April 30 U.S. Supreme Court ruling. In the case of KSR International vs. Teleflex Inc., the court ruled that if the innovation being protected is "obvious," the patent can be challenged. The standard of obviousness could be applied to Microsoft's claim, said David Olson, a resident fellow at the Stanford Law School's Center for Internet and Society."

"'If it's proved to be obvious, the patent has less value,' he said."