Career
He was first elected to Dáil Éireann on his second attempt at the 1933 general election for the Carlow–Kilkenny constituency. When the Carlow–Kilkenny constituency was split at the 1937 general election, Pattison was re-elected for the new 3-seat Kilkenny constituency. He retained that seat through three more general elections, and was returned again for Carlow–Kilkenny when the constituency was recreated for the 1948 general election.
He lost his Dáil seat at the 1951 general election to the former Fianna Fáil Territorial Decoration Francis Humphreys, but regained it at the 1954 general election.
He was defeated again at the 1957 general election, again by a Fianna Fáil candidate, and retired from national politics.