Warner loses his “Happy Birthday” song

All the 'Happy Birthday' song copyright claims are invalid, federal judge rules - Los Angeles Times

Warner loses his “Happy Birthday” song

The Tangled History And Mysterious Legality Of “Happy Birthday”

An Old Songbook Could Put 'Happy Birthday' in the Public Domain - The New York Times

Happy Birthday” Lawsuit: “Smoking Gun” Emerges in Bid to Free World's Most Popular Song – The Hollywood Reporter

Happy Birthday' song set for public domain after long copyright feud

Happy Birthday' Hits Sour Notes When It Comes To Song's Free Use : NPR

Let's Party! The 'Happy Birthday' Song Loses Its Copyright - Wharton Global Youth Program

Judge Rules Happy Birthday Song Copyright Is Not Valid