The Original Itallian Folding Bike

If there was a "hall of fame" for folding bikes, the Graziella design would certainly belong in it due to its commercial success and long history. The Graziella's form was conceived of by Italian designer Rinaldo Donzelli in 1963 and built by Teodoro Carnielli & Co. in Vittorio Veneto, Italy who then introduced it to the market in 1964. 

Carnielli was a home fitness equipment ("Cyclette" exercise bikes) and bicycle company founded in 1908.  Teodoro's son, Guido Carnielli, was instrumental in coming up with the idea to make a folding bike with small wheels that could be transported in a car.  Guido's name is listed on the bike's patent as Inventor filed on January 7, 1964 in Italy.