Alexandra Mavroidi, GR12703B
ΣΥΝΘΕΤΙΚΟΣ ΓΕΩΓΡΑΦΙΚΟΣ ΧΑΡΤΗΣ.

On November 11, 1950, Alexandra Mavroidi, of Athens, Greece, was granted a patent for inventing a synthetic geographical map.
Date of Application: 02 November 1950
Date of Issuance: 11 November 1950
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