State firms pioneers in boosting electric efficiency:
Indiana already has a number of firms working on technology aimed at boosting energy efficiency and capacity. Early this month, Indianapolis-based Trexco LLC said the U.S. Patent Office awarded it two dozen patents for a cooling system it has developed for large electrical transformers, such as those used at utility substations. The “transformer extender” is designed to stretch the capacity and lifespan of the transformers, which typically cost $2 million to $5 million and are the size of a Mack…