Wikipedia says:
So it seems to me like a GB covering MiG-21, 23 and 29 might be a good plan?From 1953 he worked in OKB Mikoyan as assistant chief engineer, chief engineer for flight tests, and as the leading designer for MiG-21 family of fighter aircraft. In 1965 he was appointed as the lead designer on the MiG-23 fighter aircraft, and the technical director of joint state tests after 1968. Starting in 1973, Ivan was deputy chief designer for the MiG-29 fighter aircraft.