Complex sentence: Sixty years later a non-lethal weapon delivering an electric shock was developed by Jack Cover and marketed by Taser International under the name "Taser", an acronym for "Thomas A. Swift's Electric Rifle".
Split into simpler sentences: Sixty years later, in reality, the Taser was invented by Jack Cover and marketed by Taser International. The trademark is an acronym for "Thomas A. Swift's Electric Rifle".