ALEXANDRIA, Va., July 16 -- United States Patent no. 12,359,430, issued on July 15.
"Span to span duct coupler" was invented by Felix Sorkin (Stafford, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A span to span duct coupler includes a coupler, a first end flange, and a second end flange. A first concrete element is formed to include a duct segment and the first end flange. The first end flange may be coupled to the first duct segment by a first duct boot. A second concrete element is formed to include a duct segment and a second end flange. The second end flange may be coupled to the second duct segment by a second duct boot. The coupler may include first and second coupler bodies and a coupler boot...