iPhone is a Chinese brand of leather products and none of them are phones, which is why Apple lost a legal battle against them and has to share the trademark for the word “iPhone” with them.
In 2002, Fujitsu made a device called the “iPad,” and Apple had to pay over $4 million to Fujitsu to buy the trademark rights. A Brazilian electronics company is legally allowed to call their phone ‘iPhone’ because they trademarked the word in 2000, 7 years prior to Apple’s iPhone. The phone runs on Android.
In 2014 Budweiser attempted to trademark the sound of a beer can opening.
The Tarzan Yell is trademarked (officially known as a Sensory Mark). “The mark is a yell consisting of a series of approximately ten sounds…” It takes over 200 words to technically describe how Tarzan yells.
In 1978, Apple Corps, founded by The Beatles, sued Apple Computer for trademark infringement. Apple Corps won, and Apple Computer agreed to not enter the music business as part of the settlement.