Friedrich Frisius was born in 1895.
Friedrich Fülleborn was born in 1866.
Friedrich Sämisch was born in 1896.
Friedrich Thielen was born in 1916.
Friedrich Staps was born in 1792.
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 Frisius was born in 1895.
Friedrich Fülleborn was born in 1866.
Friedrich Sämisch was born in 1896.
Friedrich Thielen was born in 1916.
Friedrich Staps was born in 1792.
Friedrich Hagedorn was born in 1814.
Friedrich Ramm was born in 1744.