Mighty Mite was founded in 1974 by Randy Zacuto in Camarillo, California as a supplier of replacement pickups and bridges for guitars and basses. The Mighty Mite brand was bought by Jack Westheimer in 1982 and it was reintroduced by Westheimer Corporation in 1991 as a supplier of replacement guitar necks, bodies and other parts. 

Source: Mighty Mite catalogs

Source: Mighty Mite website (21 May 2018)