>"[RMS]: You may have heard that AT&T has a patent on a simple technique called "backing store" which consists of saving the hidden parts of a window in off-scr

>"[RMS]: You may have heard that AT&T has a patent on a simple technique called "backing store" which consists of saving the hidden parts of a window in off-screen memory." Rob Pike didn't seem to correct this as wrong or overly-simplified. If true, the patent is kinda nasty. The idea of saving hidden parts of a window seems like a basic idea to anyone who develops a windows system. I don't this particular idea is deserved to be patented.