Hansen Writing Ball Patent Model. This typewriter patent model accompanied the patent application of Hans R. Malling J. Hansen of Copenhagen, Denmark in his patent application that received patent number 125,952 on April 23, 1872.

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Size: 1825px × 1369px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: industry, work