ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,558, issued on June 17, was assigned to AIRBUS HELICOPTERS DEUTSCHLAND GMBH (Donauworth, Germany) and AIRBUS HELICOPTERS (Marignane, France).

"Aircraft door with an anti-vibration device" was invented by Aurelien Vayssiere (Niederschoenenfeld Gt Feldheim, Germany), Pierre Arnould (Salon de Provence, France), Pierre Fruitet (Pompignan, France) and Alexandre Facompre (Orgon, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft door with an inner door space; a door opening system arranged at least partly in the inner door space. The door opening system comprises: at least one locking device for locking the aircraft door in a locked state, ...