ALEXANDRIA, Va., June 9 -- United States Patent no. 12,652,266, issued on June 9, was assigned to VeriSign Inc. (Reston, Va.).

"Methods and systems for data retrieval" was invented by Andrew Fregly (Reston, Va.), Joseph Harvey (Clifton, Va.) and Burton S. Kaliski Jr. (McLean, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for use by a Domain Name System (DNS) resolver includes: obtaining a first identifier that the DNS resolver associates with cache data, the cache data comprising at least a portion of one or more DNS resource records; receiving or obtaining a second identifier that an DNS nameserver associates with current data; determining whether the first identifier corresponds to the second...