Oh Birkenstocks! (DE4235261 – 1994)

Copyright © Françoise Herrmann

 

On April 21, 1994, Karl Birkenstock was awarded German patent,  DE4235261, for: Footwear in form of sandals, shoes, slippers, mules, trainers or clogs - has upper consisting of interlocking strips of material with matching cut out parts and attachments, considerably widening the scope of the invention. And, according to the Figures (I do not read German…), the sandal looks very much like a modern iteration of your beloved, corky cumfy Berkies….