Sofa bed (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Sofa bed" in English language version.

refsWebsite

Global rank English rank

1patents.google.com

1,182^nd place

725^th place

696^th place

428^th place

justia.com (Global: 696^th place; English: 428^th place)

patents.justia.com

US Patent for Knock-down sofa bed with hinged mattress Patent (Patent # 4,204,287 issued May 27, 1980) - Justia Patents Search

patents.google.com (Global: 1,182^nd place; English: 725^th place)

US4204287A - Knock-down sofa bed with hinged mattress - Google Patents