PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • BACKGROUND OF THE INVENTION(1) Field of the Invention This invention relates to wrenches and is directed more particularly to a wrench for turning handles of valves located underground, as in water or gas lines. (2) Description of the Prior Art Valves disposed underground often are left unattended for years at a time and become difficult to open or close when the need arises.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com