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The first fully functional 1x3x4-cuboid.
This puzzle was designed by Ola Jansson. The first working version was made with this design by Karl-Heinz Diekmann on his 3D-printer. The pillowing design is needed wo prevent the pieces from falling out.
In 2016 Ryan Beam presented a non-pillowed but non-proportional design. Please refer to image #3.
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Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
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