发明名称 Permanent book mark
摘要 A book mark is disclosed which is an extension of a book's endpaper or flyleaf and folded such that the fold coincides with the width of the book page and the extension folds inwardly to mark a place in the book. The book mark may be made as a separate endpaper extension by folding a sheet of paper of defined length along its longitudinal axis to form a major portion and a minor portion which has adhered to its outfold surface adhesive for attachment to the endpaper or flyleaf such that the outer edge of the endpaper or flyleaf coincides with the fold and the extension folds inwardly to mark a place in the book.
申请公布号 US4765652(A) 申请公布日期 1988.08.23
申请号 US19860907306 申请日期 1986.09.11
申请人 TROYEN, HARRY D. 发明人 TROYEN, HARRY D.
分类号 B42D1/00;B42D9/00;(IPC1-7):B42D9/00 主分类号 B42D1/00
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