Jens Oberg Olsen, Duluth, MN b. 1898

I am searching Jens Oberg Olsen b. 1898 in Sortland, Norway. He and his father Petter Martin Olsen b. 06.02.1871 came to Duluth in 1910. Petter Martin Olsen went to Canada in 1907. He worked on the Lake Superior as a fisherman, and he also built a fisherboat ("Skiff") where. Petter came back to Norway in 1947, and died in 1950. His son Jens proberly married, but died young. Have any of you heard or read something about them? Do anybody know about the boat, Jens wife or what happend to Petter?