Image: Nielsen table 1903
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Description: Fig. 1 from Charles H. Nielsen's 1903 collapsible picnic table patent application, available as File:US patent 769354.pdf.
Title: Nielsen table 1903
Credit: https://patentimages.storage.googleapis.com/ba/3b/c7/579a306b1fb80f/US769354.pdf
Author: C.H. Nielsen
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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