| http://www.w3.org/ns/prov#value | - Patent US5477631 - Expandable display device and sports card holder - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsAn expandable display device comprising a primary backing panel, which includes top, bottom, first, and second edge portions, a frame assembly including at least one top, bottom, primary and secondary side frame members sele
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