. . "P&H Creative Group." . . . . . . . . . . . . . . . . . . . . . "The evolution of the West Coast's leading art studio : 1921 to today ; Patterson & Sullivan began serving San Francisco advertising agencies in 1921, rose to prominence in the 1940s as Patterson & Hall, and today carries on the tradition as P&H Creative Group" . . . . "Patterson & Hall." . . "Patterson & Sullivan." . .