About: http://webisa.webdatacommons.org/243228486

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	In the fifth invention, each passage plate may be formed of metal such as aluminum or copper, or ceramic such as aluminum nitride.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com