Keywords: Kelly converter.png William Kelly 1811 - 1888 déposé en 1857 William Kelly 1811 - 1888 converter patent in 1857 1857-06-23 http //patimg1 uspto gov/ piw Docid 0017628 idkey NONE US Patent Office William Kelly Custom license marker 2012 06 02 PD-US PD-100 Uploaded with UploadWizard William Kelly Patent drawings |