Yes, you are... 
correct, sir!
From http://en.wikipedia.org/wiki/Pat_Harrington,_Jr. :
"Harrington became famous in the 1950s as a member of Steve Allen's TV comedy troupe, the 'Men on the Street' (which also included Don Knotts, Tom Poston, and Louis Nye). Harrington also gained considerable recognition for his many appearances as the comedic Italian immigrant 'Guido Panzini' on 'The Jack Paar Show' in the mid-1950s. [That's where I first got to know him.] In the late 1950s, he had a recurring role on Danny Thomas's CBS sitcom, 'Make Room for Daddy.'
"In the 1964–1965 television season, he guest-starred on numerous programs, including ABC's sitcom 'The Bing Crosby Show, McHale's Navy,' and NBC's 'Kentucky Jones' (starring Dennis Weaver). In a 1965 episode of 'The Man from U.N.C.L.E.: The Bow-Wow Affair'), Harrington reprised his role as 'Guido Panzini'. That same year he appeared as Thomas Kelly in the unusually-titled episode, 'There's a Penguin in My Garden', of the NBC education drama series, 'Mr. Novak,' starring James Franciscus.
"In 1967, he appeared in the Elvis Presley film Easy Come, Easy Go. He also parodied 'Get Smart' in an episode of 'F Troop,' in which he played secret agent 'B Wise'.
"Harrington worked as a voice actor, most notably providing the voice of 'The Inspector' from 1965 to 1969 in the theatrical cartoon series of the same name. He was also the voice of Ray Palmer/the Atom on 'The Superman/Aquaman Hour of Adventure' in 1967. In 1974, he co-starred with Peter Falk and Robert Conrad in the 'Columbo' episode An 'Exercise in Fatality.'
"However, Harrington is also widely known for his role as affable building superintendent 'Dwayne Schneider' on the 1975–1984 television sitcom 'One Day at a Time.' He won both an Emmy Award and a Golden Globe Award for his work on this series. He reprised his role as Schneider in a series of commercials for Trak Auto Parts after the show ended. In 2012, he also appeared as a guest star on the TV Land Sit-com, 'Hot In Cleveland,' which stars Valerie Bertinelli, a co-star of One Day at a Time."