Dear Mr. Damm,
Thank you for posting your request on History Hub!
Death certificates often include the place of birth, therefore we suggest that you search the Michigan Deaths and Burials, 1800-1995 FamilySearch index, the Ohio, County Death Records, 1840-2001 FamilySearch index and/or request a death record search from the appropriate County Court office in Ohio and the State of Michigan Vital Records Office . In addition, the FamilySearch Research wiki for Ohio Vital Records and Michigan Vital Records may be helpful.
We suggest that you review the NARA’s Immigration Records website as well as the FamilySearch Research wiki for Michigan Emigration and Immigration Genealogy. We also suggest contacting the Michigan History Center Archives.
Once you locate the birthplace information, we suggest that you consult the FamilySearch Research wiki on Germany Genealogy for information on locating the original birth record.
We hope this is helpful. Best of luck with your research!