Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Paul Jean, A BouchonfiledCriticalPaul Jean
Publication of CH18664ApublicationCriticalpatent/CH18664A/fr
Nouveau système de composition d'affiches, placards et enseignes à caractères amovibles et interchangeables plus spécialement applicable à la publicité commerciale