During the 1950s he stayed abroad to research; at the UK Post Office Research Station in 1951 and the SHAPE Air Defence Technical Centre (SADTC) from 1957 to 1960.
Haakon VII of Norway | Haakon Chevalier | Haakon VI of Norway | Haakon Shetelig | Haakon's Hall | Haakon Magnusson of Norway | Haakon |