Advanced Micro Devices is a little worried about a patent granted to it in 1978, and has asked the US Patent Office to take another look at it: AMD’s Programmable Array Logic device patent is considered the fundamental patent on field programmable logic integrated circuits widely used in computation and communications products, and the company made its unusual move after it found a document raising questions about whether certain information was in the public domain prior to its filing of the patent application; AMD does not believe that the information was in the public domain, and expects validity of the patent to be upheld.
