Hoverulle Arendal No.12 1868-1855

I found the listing for Marthin Nicolaisen in the index and located this page based on patent no. 2156. Huseland and DOB check out. https://www.digitalarkivet.no/ru20090317690711 What is this telling me? There seems to be only one ship listed. This must be when he first went to sea. Will the patent No. help me find more information elsewhere?