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

Kristiania Oslo ( or ; ) is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of in 2022, while the city's greater urban area had a population of 1,064,235 in 2022, an ...

as a son of Jakob Peter Thommessen and Maja Johannessen. He was a nephew of Ola Thommessen and a first cousin of

Rolf Thommessen Rolf Thommessen (22 July 1879 – 9 December 1939) was a Norwegian journalist, newspaper editor and politician. He edited the newspaper ''Tidens Tegn'' from 1917 to 1938. He was a member of the Parliament of Norway from 1928 to 1930, represen ...

. In April 1924 in Kristiania he married Ebba Lindeman. 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 A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention."A ...

trademark law A trademark (also written trade mark or trade-mark) is a form of intellectual property that consists of a word, phrase, symbol, design, or a combination that identifies a product or service from a particular source and distinguishes it from ot ...

and

tax law Tax law or revenue law is an area of legal study in which public or sanctioned authorities, such as federal, state and municipal governments (as in the case of the US) use a body of rules and procedures (laws) to assess and collect taxes in a ...

, and he wrote a seminal article on tax law in '' Norsk Retstidende'' in 1934, and a commentary on trademark law in 1961. Between 1940 and 1945 he was a member of the Norwegian resistance movement. He was a member of the leading inner circle Kretsen from 1943, later Hjemmefrontens Ledelse. 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 A government-in-exile (GiE) is a political group that claims to be the legitimate government of a sovereign state or semi-sovereign state, but is unable to exercise legal power and instead resides in a foreign country. Governments in exile usu ...

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 The United Nations Conference on International Organization (UNCIO), commonly known as the San Francisco Conference, was a convention of delegates from 50 Allies of World War II, Allied nations that took place from 25 April 1945 to 26 June 194 ...

in 1945 and the Paris Peace Conference of 1946. 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 Orkla Mining Company Ltd. () was a Norwegian mining company established in 1904. The company was the largest mining company in Norway in the aftermath of World War I, and was among the world's largest pyrite producers. After closing of the mining ...

from 1956 to 1957. He was also a vice chancellor of the Order Council. He died in 1986.

References

{{DEFAULTSORT:Thommessen, Oeystein 1890 births 1986 deaths Lawyers from Oslo University of Oslo alumni Norwegian resistance members Norwegian expatriates in Sweden 20th-century Norwegian lawyers