Made popular by their use on Zippy, Flightmax, and Turnigy batteries, XT60's were designed from the ground up to be an excellent Deans replacement, and are now one of the most widely used connectors. 

While no patent exists on the XT60 connector, I can gaurentee you the ones used in this adapter are made by the original factory that invented them. They contain high-temp nylon and gold plated spring connectors which ensures a solid high-amp connection, perfect for applications up to and beyond 65A constant.