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 filedfiledCritical
Publication of BE646664ApublicationCriticalpatent/BE646664A/xx
B42F13/00—Filing appliances with means for engaging perforations or slots
B42F13/40—Filing appliances with means for engaging perforations or slots combined or formed with other articles, e.g. punches, stands
B—PERFORMING OPERATIONS; TRANSPORTING
B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
B42D3/00—Book covers
B42D3/12—Book covers combined with other articles
B42D3/14—Book covers combined with other articles with column markers or line or heading indicators with devices for indicating a page
B42D3/145—Book covers combined with other articles with column markers or line or heading indicators with devices for indicating a page attached to the back of the cover