Eddie Applegate
Eddie Applegate is an American television actor, best known for his work in the 1960s, most notably in the role of Richard Harrison, the boyfriend of Patty Lane on The Patty Duke Show.
Applegate was born in Wyncote, Pennsylvania. He appeared as Richard Harrison, the boyfriend of Patty Lane, in 70 out of the 104 episodes of the Patty Duke Show, which was broadcast on ABC from 1963 to 1966. In the 1960s, Applegate appeared as single episode characters in a number of other popular television shows, including The Lucy Show, Daktari, and Gunsmoke. In the 1970 television season, he appeared as Willie Maxwell, a reporter, on the relatively shortlived series Nancy.
Source: Wikipedia