| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | Submerged floating tunnel - Proposals |  |  |  |  |
| 3 | Date | Place | Country | Proposer | link |
| 4 | 1886 | Patent N.9558 | United Kingdom | Sir Edward James Reed | - |
| 5 | 1923 | Patent | Norway | Trygve Olsen | - |
| 6 | 1947 | patent pending nr. 91699 | Norway | Erik Ødegård | - |
| 7 | 1969 | Strait of Messina | Italy | Alan Grant | - |
| 8 | 1998 | Høgsfjorden | Norway | Norwegian Public Roads Administration | - |
| 9 | April 16, 2003 | Transatlantic tunnel | N/A | Discovery Channel's Extreme Engineering (Season 1, episode 3) | - |
| 10 | 2011 | Sognefjord | Norway | Norwegian Public Road Administration | - |
| 11 | 2016 | Bjørnafjord | Norway | Norwegian Public Road Administration | - |
| 12 | June 6, 2017 | Multiple potential sites | N/A | Hyperloop One | - |
| 13 | ? | Funka Bay, Hokkaido | Japan | Society of Submerged Floating Tunnel Technology | - |
| 14 | ? | Lake Washington, Seattle | United States | James Felch / Subterra, Inc. | - |
| 15 | ? | Vancouver Island | Canada | Ministry of Transportation of British Columbia, Canada | - |
| 16 | ? | Lugano Lake | Switzerland | - | - |
| 17 | - | Cook Strait | New Zealand | Stuff.co.nz t | - |

Question: What Norwegian patent proposals for submerged floating tunnel structures were proposed before 1950?
Answer: 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.