About: http://webisa.webdatacommons.org/92024824

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	Description of the Prior Art Various types of devices have heretofore been designed and marketed for dispensing the vapors of volatile substances.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com