ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,618, issued on March 25, was assigned to HVAC Inventors/Systemation Inc. (Port St. Lucie, Fla.).

"Apparatus and method for closing duct seams and for inserting angle plates and closing duct seams" was invented by David E. Daw (Port St. Lucie, Fla.) and John T. Ehling (Edison, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and methods are described for automatically closing the seam of duct work and for automatically inserting angle plates into duct work and then closing the seam of the duct work. The seam closing apparatus includes a first seam closing members for closing the top and bottom portions of the seam and a second seam clos...