Well, given that Xerox PARC came up with the laser printer, and Xerox and people they've licensed their patents to have sold millions of laser printers, I'd gue

Well, given that Xerox PARC came up with the laser printer, and Xerox and people they've licensed their patents to have sold millions of laser printers, I'd guess that PARC paid for itself many many times over. Not to speak of the fact that most of Apple's products seem to be implementations of ideas from PARC.