<page_title> Submerged floating tunnel </page_title> <section_title> Proposals </section_title> <table> <cell> 1923 <col_header> Date </col_header> </cell> <cell> Patent <col_header> Place </col_header> </cell> <cell> Norway <col_header> Country </col_header> </cell> <cell> Trygve Olsen <col_header> Proposer </col_header> </cell> <cell> 1947 <col_header> Date </col_header> </cell> <cell> patent pending nr. 91699 <col_header> Place </col_header> </cell> <cell> Norway <col_header> Country </col_header> </cell> <cell> Erik Ødegård <col_header> Proposer </col_header> </cell> </table>
In Norway, a first patent on Submerged floating tunnel structure was presented in 1923 by Trygve Olsen and a new request was done in 1947 by Erik Ødegård.