Olivieri died Friday at the Atlantic City Medical Center. He was the younger brother of Pat, with whom he worked a hot dog stand beginning in 1930. The brothers experimented by cutting up steak and grilling it with onions and serving it on a bun.
In 1952, they added Cheez Whiz to the mixture, and the sandwich and their restaurant, Pat's King of Steaks went on to gain national fame, the Philadelphia Inquirer reported Saturday
Pat Olivieri died in 1974.
The restaurant is lined with photographs of celebrities who ate there, including President Bill Clinton, Jimmy Durante, Joey Bishop, Rodney Dangerfield, Connie Stevens, Henry Winkler, the Bee Gees and Lou Rawls.
Olivieri is survived by his wife, a daughter and son, four grandchildren and seven great-grandchildren.