Siegrist - Flying Machine, Swiss Patent 37419 of 1906
A Swiss patent filing from 1906 by Hermann Siegrist for a flying machine, drafted for the federal patent office and its examiners during the first years of powered flight. The plate is a pen-and-ink elevation of a lattice mast, long trussed wing arm and wheeled undercarriage, labelled with small italic reference letters, paired with an engraved letterhead bearing a rayed Swiss cross \u2014 useful for technical line work and official ornament.
