Alternating Electric Current Generator 102 0 Downlod here USA042 - US447921 Print Rate this article: No rating No.USA42Patent447,921Year1891CountryUnited States of AmericaDate of ApplicationMarch 10, 1891Patent TitleAlternating Electric Current Generator Documents to download USA042 - US447921 (.pdf, 355.3 KB) - 101 download(s)