The lawsuit by X Social Media claims that X Corp, which owner Elon Musk began rebranding to X from Twitter in July, was likely to cause consumer confusion.
X Social Media declined to comment.
Windermere, Florida-based X Social Media is an ad agency focused on mass-tort litigation.
The lawsuit said the agency has used the "X Social Media" name since 2016 and owns a federal trademark covering it.
X Social Media asked the court to force Musk's company to stop using the "X" name and requested an unspecified amount of money damages.
Persons:
Carlos Barria, Elon Musk, Jacob, Roseanna Malherbe, Blake Brittain, Dietrich Knauth, David Bario, Angus MacSwan
Organizations:
REUTERS, X Corp, Twitter, X Social Media, Microsoft, Social Media, Thomson
Locations:
San Francisco , California, U.S, Florida, Windermere , Florida, Gulf of Mexico, Washington, New York