cross-posted from: https://lemmy.zip/post/834308
Archived version: https://archive.ph/cQmID
Archived version: https://web.archive.org/web/20230729214729/https://www.bleepingcomputer.com/news/technology/apple-rejects-new-name-x-for-twitter-ios-app-because-rules/
One of the more interesting big-name trademark collisions I can recall is Apple Computers and Apple Records (the music label the Beatles signed under). The two companies coexisted just fine for decades, and then Apple created iTunes and all legal hell broke loose because there were now two "Apple"s in the music business.
IIRC Apple Computers had negotiated usage of the Apple trademark for computers but was explicitly prohibited from doing anything music related with it. It was settled out of court but I am sure Apple records made a lot of money once they started up iTunes.