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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6543076 | Cabin for a telescopic gangway A telescopic gangway cabin has a canopy roof and a floor extending over the entire width of the canopy roof The gangway cabin can be used for docking to conventional commercial aircraft as well as to commuter aircraft. The undivided floor has a railing in... | 04/08/2003 |
| 6496996 | Telescopic gangway A telescopic gangway is provided for handling the passengers of single-deck or double-deck passenger airplanes parked nose in at least at one of the doors of the main deck or upper deck, which doors are located in front of, above or behind the wing. Passe... | 12/24/2002 |
