US Patent 11542736 Piano hinges

A piano hinge can include a first hinge portion configured to attach to a first door edge, the first portion having a first front face, a first jamb face extending rearward from the first front face, and one or more first hinge knuckles extending from either or both of the first front face and the first jamb face. The first front face can be configured to extend over the one or more first hinge knuckles in a lateral direction such that the first front face hides the one or more first hinge knuckles behind first front face.