Here's the American Pizzeria Timeline, which includes only two nonPizza Belt entries, Tommaso's and Uno's:
1905: Lombardi's, on Spring Street in New York City, is granted the nation's first license to sell pizza.
1910: Joe's Tomato Pies opens in the Trenton, New Jersey, Chambersburg neighborhood.
1912: Papa's Tomato Pies in Trenton opened by Papa, who learned his trade at Joe's.
1924: Anthony (Totonno) Pero leaves Lombardi's and opens Totonno's in Coney Island, New York.
1925: Frank Pepe opens on Wooster Street in New Haven, Connecticut.
1926: Pizzeria Regina opens in Boston's North End.
1929: John Sasso from Lombardi's opens John's on Bleecker Street in New York's Greenwich Village.
1929: Marra's opens in Philadelphia.
1931: Eddie's opens in New Hyde Park, Long Island (Nassau County), New York.
1932: Paul's Apizza opens in East Haven, Connecticut.
1933: Santarpio's starts serving pizza in East Boston, Massachusetts.
1933: Patsy Lancieri opens Patsy's in East Harlem, New York.
1934: State Street Apizza (now Modern Apizza) opens in New Haven.
1934: Sciortino's opens in Perth Amboy, New Jersey.
1935: Tommaso's (originally Lupo's) opens in San Francisco (not in the Pizza Belt).
1936: Reservoir Tavern opens in Boonton, New Jersey.
1936: Original DeLorenzo's opens in Trenton, New Jersey, on Hudson Street.
1938: Salvatore Consiglio, Frank Pepe's nephew, opens Sally's on Wooster Street in New Haven.
1943: Uno's opens in Chicago (not in the Pizza Belt).
1946: Tacconelli's begins serving pizza in the Port Richmond section of Philadelphia.