Yoon , 6th dan ( 1999 ) .
Park , 4th dan ( 1963 ) , 5th dan ( 1966 ) ; T. Walsh , 2nd dan ( 1971 ) ; and Y.K.
Yoon , 4th dan   ( 1999 ) .
Park , 4th dan ( 1963 ) , 5th dan ( 1966 ) ; T. Walsh , 2nd dan ( 1971 ) ; and Y.K.