ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,833, issued on Oct. 21, was assigned to JELD-WEN Inc..

"Fenestration unit with sill arrangement fluid management system" was invented by Jacob David Anderson (Remond, Ore.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sill arrangement for a fenestration frame includes a sill with a first chamber, a second chamber, a third chamber, and a fourth chamber. The sill includes a first internal wall that separates the first chamber from the second chamber. The sill arrangement also includes a corner key with a first port defining a first passage between the first and second chambers and a second passage between the second and third chambers of the sill. ...