This project "SmartDeblur" is nearly 9 years old, but it works miracles for recovering text. https://github.com/Y-Vladimir/SmartDeblur/
It's a standalone Windows-or-OSX-app in Qt with a clunky UI.
The code is AGPL; I am unclear if there are any patents involved on the algorithms. But the author did publish a lot of background material on his personal site, which may preclude some claims on it being all trade-secrety. If anybody felt like re-implementing it.
