Well the third installment of Thursday Threes feels special, so here are links to 3 blogs I've previously written.
Balenciaga blatantly copied Little Trees trade dress of their air fresheners.
Link -"The Scent of Parody? Balenciaga sued over Little Trees trademark"
Monster (owned by Coke-a-Cola) is a trademark bully. They'll file an opposition against anyone with M or three slashes. Even today, I think this label still stands.
Link - "What makes a Monster?: Monster Energy Company’s History as a Brand Bully"
To obtain a registration from the U.S. Patent and Trademark Office, an applicant must show a bona fide use of the mark in interstate commerce. But how do you prove use in commerce if your goods are imaginary? Like, let's say an imaginary card game that's an integral part of the plot to Han Solo getting the Millennium Falcon? Well the trademark story of Sabacc is quite interesting.
Link - "Trademarking Imaginary Goods: A Star Wars Story"