Jon Leon Liljequist, American patent lawyer. Bar: Illinois 1964, United States District Court (northern district) Illinois 1964, United States Patent Office 1964, United States Court Appeals (District of Columbia circuit) 1980; registered professional engineer, Illinois, Florida. Recipient Silver Circle award University Illinois, Chicago, 1983, 86.
Design engineer Outboard Marine Corporation, Waukegan, Illinois, 1958-1960. Instructor engineering University Illinois, Chicago, 1960-1963, professor in structural engineering, undergraduate law, since 1964, patent consultant, since 1984. Associate Hofgren, Wegner, et al, 1963-1964, Darbo, Robertson et al, Arlington Heights, Illinois, 1964-1966.
Patent counsel Appleton Electric Company, Chicago, 1966-1986. Owner, president Timark Company, Mount Prospect, Illinois, 1969-1976. Legal and engineering consultant Hannafan & Handler, Chicago, since 1985, Dressler, Goldsmith, Shore, Sutker & Milnamow, Chicago, University South Florida, Tampa, Leydig, Voit and Mayer, 1988.