Before revision: nzGarda LakeItalyGiacomo Cis Onlus committee?Irish SeaUnited Kingdom CiteURL Europe In Norway, a first patent on this structure was presented in 1923 by Trygve Olsen ("Submerged pontoon bridge") and a new request was done in 1947 by the engineer Erik Ødegård.
After revision: nz journalistsGarda LakeItalyGiacomo Cis Onlus committee?Irish SeaUnited Kingdom committee2021Irish SeaUnited KingdomBoris Johnson Europe In Norway, a first patent on this structure was presented in 1923 by Trygve Olsen ("Submerged pontoon bridge") and a new request was done in 1947 by the engineer Erik Ødegård.