They aren't related.
The doornob
Osbourn Dorsey, invented the doorstop
Osbourn Dorsey invented the door knobs
As A matter of fact yes i am
Osbourne Dorsey invented doorknobs because he thought it would be easier for everybody to open and close their doors.
sep 15,1913
Issan Dorsey died in 1990.
Decatur Dorsey died in 1891.
Clement Dorsey died in 1848.
Carl Dorsey died in 1974.
Dana A. Dorsey died in 1940.