Øystein Thommessen

Øystein Thommessen (31 October 1890 – 1986) was a Norwegian lawyer.

He was born in Kristiania as a son of Jakob Peter Thommessen and Maja Johannessen.^[1] He was a nephew of Ola Thommessen and a first cousin of Rolf Thommessen.^[2] In April 1924 in Kristiania he married Ebba Lindeman.^[1]

He took his examen artium at Aars og Voss skole in 1908, and then graduated from the Royal Frederick University with the cand.jur. degree in 1912. He was a deputy judge in Aker from 1913 to 1916 and a junior solicitor from 1916, until taking the lawyer's credentials in 1919. From 1922 he worked as a law firm partner. His specialties were patent law, trademark law and tax law, and he wrote a seminal article on tax law in Norsk Retstidende in 1934, and a commentary on trademark law in 1961.^[1]

Between 1940 and 1945 he was a member of the Norwegian resistance movement. He was a member of the leading inner circle from 1943, later . In cooperation with Tor Skjønsberg he had regular contact with the Norwegian legation in Stockholm, securing several monetary loans through contacts with the government-in-exile representatives stationed in Stockholm. He worked there himself from 1944, after he had to flee Norway. He was later a Norwegian delegate to the United Nations Conference on International Organization in 1945 and the Paris Peace Conference of 1946.^[1]

He was chairman of the Norwegian Museum of Cultural History from 1948 to 1966, and a board member of Gyldendal Norsk Forlag from 1941 to 1965, Elektrokemisk from 1952 to 1965 and Orkla Grube-Aktiebolag from 1956 to 1957. He was also a vice chancellor of the Order Council.^[1] He died in 1986.^[2]

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