Friedrich Soennecken was born in 1848.
Friedrich Litten was born in 1873.
Friedrich Gerstäcker was born in 1816.
Friedrich Fülleborn was born in 1866.
Friedrich Thielen was born in 1916.
Friedrich Kunath was born in 1974.
Friedrich Soennecken died in 1919.
Ring Binders were invented in 1886 by a man named Friedrich Soennecken. He also invented the hole bunch in 1886.
Friedrich Born was born in 1903.
Friedrich Golling was born in 1883.
Gerhard Friedrich was born on 1917-09-16.
Friedrich Pfotenhauer was born in 1859.
Friedrich Westmeyer was born in 1873.
Friedrich Siebenrock was born in 1853.
Friedrich Kiel was born in 1821.
Friedrich Kipp was born in 1814.
Friedrich Koch was born in 1862.
Friedrich Ladegast was born in 1818.