MOVING TO FRONT FROM FEBRUARY 22--UPDATED
A specialist in early modern philosophy, metaphysics and philosophy of language, Professor Mondadori spent most of his career at the excellent terminal MA program in philosophy at the University of Wisconsin, Milwaukee. An obituary is here (although it states wrongly he taught early on at Penn State--it was at the University of Pennsylvania).
(Thanks to Ed McCann for the pointer.)
UPDATE: The UWM memorial notice is here. (Thanks to John Koethe for the pointer.)