Hi Donna!It's Mark again. I think we have our Jacob Korb's mixed.I went onto "Ancestry.com" to check things out.My Jacob P. Korb was born in Brady Township,PA on 30th of May 1905.Your Jacob Korb was born in 1844 in Red Willow County Nebraska.He married Sarah Henrietta Bates (born Nov. 10, 1848), but do not know date of wedding.They had a son named Roy Korb in 1886.Sarah's parents were Charles and Charlotte Augusta Field Bates originally from Bridgeville in Sullivan Co, New York.
On that particular web-site, you can contact Ron Friedel.His e-mail address is right on it. I hope this helps you. It's funny how people can have the same last name, but may not be so directly related.
PS We would just have the Jacob P Korb and Anna Caroline Hartzfeld lineage.However, your dates are correct.