Forty-three years is too long even for Gilbert P. Hyatt, the dogged inventor who once shocked the computer industry and got rich.
Hyatt said he’s been waiting that long for a U.S. ruling on whether his electronic signal to control machinery should be granted a patent. The patent-approval process takes 28.3 months on average. His idea for liquid crystal displays? That’s been sitting in the Patent and Trademark Office for 35 years.