About: http://webisa.webdatacommons.org/220774286

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	No. 821,580 2 Claims. (Cl. 50-192) This invention relates to roof covering in the form of shingles, strips, or sheets and more particularly to such covering having heat reflective and heat absorbent areas.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com