| http://www.w3.org/ns/prov#value | - Patent US4595105 - For adding onto an existing bookshelf - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsFor 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 stored or shipped in knocked-down for
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