The meeting between the last two Wimbledon champions proved one-sided as Poland's Kubot and Brazil's Melo, seeded seventh, had no answer for the tactical game deployed by the third-seeded American duo.
Bryan and Sock, who also triumphed at Wimbledon this year in their second event as a team, won all of their service games and converted four of their 10 break point opportunities to secure the win.
With the win the Americans became the first team to win consecutive Grand Slam titles since Bryan and his twin brother Bob, who has been sidelined with a hip injury, swept four straight starting at the 2012 U.S. Open.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Bryan also moved past Australian John Newcombe on the all-time list of Grand Slam doubles titles.
"This is not just about me. It's a team effort," said Bryan. "Takes a lot of people behind the scenes to get this 40-year-old body on the court and winning a couple matches."
(Reporting by Frank Pingue, editing by Pritha Sarkar)
