Method of Operating Electro Magnetic Motors 90 0 Download here USA028 - US416192 Print Rate this article: No rating No.USA28Patent416,192Year1889CountryUnited States of AmericaDate of ApplicationDecember 3, 1889Patent TitleMethod of Operating Electro Magnetic Motors Documents to download USA028 - US416192 (.pdf, 248.24 KB) - 83 download(s)