PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This invention relates to transducers, and particularly to electroacoustic, acoustoelectric, electromechanic, and mechanoelectric piezopolymer transducers, such as microphones, earphones, and loudspeakers for use in telephony and electrical communications, in broadcast, television and home recording applications, and other fields.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com