Oscar Ludwig Miller
My 2nd Great Grandfather

Born: 6 Sep 1868 in Dexter, Michigan
Died: 10 Jul 1940

Father: Johann Gottlieb Mueller
Mother: Anna Maria Stuber

Wife: Eleanor Scott Kean
Children: Glenn Eugene Miller

I haven’t been able to find out much about his life, although I did find this US Patent for Differential Gearing, Oscar Ludwig Miller is listed as one of the patent holders:

US Patent - Oscar Ludwig Miller