Inside Out Library · ExplorePopescu - Flying Machine, French Patent 345362 of 1904 (1904)Dimitri Popescu and Isak Aspis · leaf 0Patents · French patents · Flying machines · Helicopters · AircraftInternet Archive · Public Domain Mark 1.0. Free to use for anything.More pictures from Popescu - Flying Machine, French Patent 345362 of 1904More like this