Verathon, a 25-year-old Bothell medical device maker founded by electrical engineer and Vietnam veteran Gerald McMorrow, has been sold as part of what appears to be a blockbuster, multi-million dollar deal. Sarasota, Florida-based Roper Industries -- which describes itself as a “diversified growth company” -- on Friday said it was buying Verathon as well as traffic software and hardware company United Toll Services for a combined $356 million.