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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/TG/1/13/173" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter from Carrie Gold to Patent and Trademark Office, Washington DC</dc:title>
  <dc:description>Asks for a copy to be sent of patent 3,969,225 entitled ' Differential separation of particulars by combined electrostatica and radio frequency means '. </dc:description>
  <dc:date>23 August 1976</dc:date>
</rdf:Description>