Historical Marker
Rock Run Mill
Historical marker location:
Havre de Grace, Maryland
( Marker is on Stafford Road south of Rock Run Road, on the left when traveling south.)
Maryland was home to the first African American woman to hold a patent: In 1885, Sarah E. Goode, an African American woman from Baltimore, became the first African American woman to hold a U.S. patent. Her invention was a folding cabinet bed, which was designed to save space in small apartments.