Jacob Ellehammer
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Jacob Christian Hansen Ellehammer (1871–1946) was a Danish watchmaker and inventor who made significant aero inventions.[1]
Built a flying machine in 1904 and ran tests tethered to a mast. Claimed flight of 42 meters, 1.5 meters above the ground, on 12 September 1906. Later developed a helicopter airplane attachment.[2]
Ellehammer described his occupation in 1912 as Manufacturer and his address as Istedgade 119, Copenhagen.[3]