| http://www.w3.org/ns/prov#value | - Patente US4595105 - For adding onto an existing bookshelf - Google PatentesB???squeda Im???genes Maps Play YouTube Noticias Gmail Drive M???s ??Iniciar sesi???n B???squeda avanzada de patentesPatentesFor supporting hard- and soft-covered books, magazines, catalogs and other reading material of various sizes and shapes in an upright position on a bookshelf, table or desktop, this bookrack may be st
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