About: http://webisa.webdatacommons.org/354197979

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. 161,956 8 Claims. (Cl. 35--63) This invention relates to educational and play appliances in general and particularly to a combination blackboard, easel and table which may be used in this connection.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca