Three booklets in stencil printing with dozens of pages – extensive details on an Israeli patent regarding the method of production of decorated plastic objects. The patent was filed by two Jewish immigrants from Switzerland: Siegfried Halweer, Gustav Hessel, and Supported by Ornpress – a registered company in Switzerland. The patent was filed in 1957, and was obtained in 1959. The title page with the approval of the patent received, signed by the Israeli Patent Registrar b. Gil.
The booklets are in an original folder from the 1950s. general condition very good .
