A cool thing about trademarks is that the item had to exist in order for the trademark to be registered. This is unlike patents, where something could be patented but never produced commercially. Here’s an unexpected trademark registered to Disston, a company better known for the handsaws it produced. I’ve never seen a Disston Cigarette knife, but since the trademark was registered, they must have been produced! I’m also a fan of wording that explains that “The trade mark is usually displayed by etching it directly upon the goods”.