With the death certificate number, you can order the certificate itself from the society for $1.Without the death cerrtifice number (just name and approx. death date), they will search for the certificate for $5.
I also found the 1910 census for Steven, not that it has any more info than you already had: 1910 Ohio, Wood County, Grand Rapids, ED 186, Page 4B. Dwelling 118. Owns home free and clear Steven G. Robinson, head, 72, married (first marriage), for 52 years, b NY, father b MD, mother b NY, living on own income, reads, writes Isabelle, wife, 69, married (first marriage), for 52 years, she and parents b Pennsylvania, reads, writes