A Manchester City fan attends the trophy ceremony after the end of the Soccer Club World Cup final match between Manchester City FC and Fluminense FC at King Abdullah Sports City Stadium in Jeddah, Saudi Arabia, Friday, December 22, 2023. Manchester City won 4-0. (Photo by Manu Fernandez/AP Photo)
Natasha Cloud #0 and Diana Taurasi #3 of the Phoenix Mercury gather their team before the game against the Seattle Storm at Climate Pledge Arena on June 04, 2024 in Seattle, Washington. (Photo by Steph Chambers/Getty Images)
Klemens Torggler's door is an invention based on rotating squares, The special construction makes it possible to move the door sideways without the use of tracks. This technical trick opens up new applications for the door.