Image: https://cdn.whensthebirthday.com/gallery/2017/1/frank-j-sprague/figura-3-frank-j-sprague-en-su-75-cumpleanos-el-25-de-julio-de-1932.jpg
Frank J. Sprague
professions.inventor de Estados Unidos
Image: https://cdn.whensthebirthday.com/gallery/2017/1/frank-j-sprague/figura-3-frank-j-sprague-en-su-75-cumpleanos-el-25-de-julio-de-1932.jpg
professions.inventor de Estados Unidos