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Application filed by IndividualfiledCriticalIndividual
Priority to ES112471UpriorityCriticalpatent/ES112471Y/en
Publication of ES112471UpublicationCriticalpatent/ES112471U/en
Application grantedgrantedCritical
Publication of ES112471YpublicationCriticalpatent/ES112471Y/en
Guide books loose leaf essentially characterized by being constituted by an elastic sheet having a plurality of perforations along its inner edge of splitting paths open to the adjacent edge labyrinthine grooves to allow passage pressure circlips device of binding without the need to open them. (Machine-translation by Google Translate, not legally binding)
ES112471U1965-03-201965-03-20
GUIDE TO CHANGING SHEET BOOKS.
ExpiredES112471Y
(en)