CARTE INTESTATE

Albert Einstein, 1932 | Source

Scientific American magazine, 1887 | Source

The suitably incredible business letterhead of Nikola Tesla, circa 1900. Inventions featured, clockwise from top-left: Oscillation Transformer, Telautomaton (wireless, remote-controlled devices; pictured is a remotely-operated boat, showcased in 1898), Steam & Gas Turbine, Induction Motor. Centre: Wardenclyffe Tower (never completed).

Nikola Tesla Company, c.1900

The Laboratory of Thomas A. Edison, 1923 | Source

Su letterheady.com e lettersofnote.com, via nomfup