About Patent Cyanotype Drawing (1880)
The US Patent Office cyanotype is the white-on-Prussian-blue ammonia-developed drawing that served as the canonical technical illustration for every American invention patent between 1875 and 1920. Edison's light bulb, Bell's telephone, the Wright brothers' airplane — all rendered in this exact visual vocabulary of hairline draftsmanship on deep federal blue.
This system captures the austere authority of government documentation married to the craft of professional patent draftsmen. Every element evokes ammonia-developed paper, aged white ink, and the ornamental borders of Victorian legal documents.
- Origin
- USA — Washington DC, New York, Boston, Philadelphia
- Era
- 1875–1920 (cyanotype patent-drawing standardization); process invented 1842
- Key figures
- Orson Desaix Munn · Alfred Ely Beach · Sir John Herschel · Anna Atkins
- Movements
- Gilded Age American patent culture · 19th-century technical illustration · Cyanotype photographic process
Patent Cyanotype Drawing (1880) design spec
Colors
Typography
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