Electrical Transformer or Induction Device 113 0 Download here USA038 - US433702 Print Rate this article: No rating No.USA38Patent433,702Year1890CountryUnited States of AmericaDate of ApplicationAugust 5, 1890Patent TitleElectrical Transformer or Induction Device Documents to download USA038 - US433702 (.pdf, 195.57 KB) - 114 download(s)