Method & App. for Converting Alternating into Direct Currents 112 0 Download here CDN004 - C33317 Print Rate this article: No rating No.CND4PatentC33,317Year1889CountryCanadaDate of ApplicationDecember 19. 1889Patent TitleMethod & App. for Converting Alternating into Direct Currents Documents to download CDN004 - C33317 (.pdf, 569.94 KB) - 85 download(s)