Baumann - Device for carrying objects by means of a wing in the air, German Patent 144236 of 1903
German patent specification No. 144236, granted to Adrian Baumann in 1903 and printed by the Reichsdruckerei for engineers and patent examiners consulting the official rolls. The single sheet carries a plan and side elevation of a triangular-braced wing rig drawn in fine black line, overlaid with red numbering stamps, inked marginal notes and a signature on tanned paper.
