Inspired by

Nicolaus Copernicus (Mikołaj Kopernik),
Nicholas Bion,
Kaspar von Faber,
Joseph Bramah,
Thomas de la Rue,
Petrache Poenaru,
Alfred Nehemias,
August Eberstein,
Claus Johannes Voss,
Lewis Waterman,
George Safford Parker,
Walter A. Sheaffer,
Carl Hornemann,
Ryosuke Namiki,
Masao Wada.