After the J. Geils Band dissolved in 1985, Salwitz spent time working on a harmonica design of his own, the "Magic Harmonica," for which he received a patent with co-inventor Pierre Beauregard [REF].
Salwitz contributed his harmonica playing and some vocals to a live recording, "Command Performance", by the Legendary Rhythm & Blues Revue, featuring the Tommy Castro Band, Deanna Bogart, Ronnie Baker Brooks, and others.