(As usual, IANAL, and I only know about US trademark law, but many countries have signed IP treaties with the US, so it’s probably at least similar in most places)
- Trademark is very different from copyright. Copyright stops you from copying something, trademark only stops you from pretending to be (or be associated with) the person/company the mark represents.
- That’s the purpose in the end: Trademark protects consumers from being scammed by imposters. And it’s pretty well-scoped in terms of not doing anything else.
- Trademark is much harder for companies to get than copyright, and much easier for them to lose. A company must demonstrate that the average consumer is likely to associate the mark with them and them alone. They must sue anyone who infringes on the mark to demonstrate that they are still protecting it. They can lose protection at any time if the public largely stops associating them with the mark.
- Trademarks often apply very narrowly, which is why products in other markets can still be called “GPT” if a consumer wouldn’t likely confuse the two. OpenAI wouldn’t get to “own those three letters”, but they would be the only people allowed to use those three letters in the brand name of an AI model (or however the PTO decides to scope it).
- Trademarks by definition MUST be non-functional. A car company can’t trademark the arrangement of gears in their engine, but they CAN trademark the paint color if no one else is using that particular color and consumers associate it with their brand.
- A company doesn’t need to “invent” the thing they are named after. Apple didn’t invent apples, Amazon didn’t invent the Amazon. It’s certainly not a great idea to try and get a trademark on a name that was previously used for something else, but if you can demonstrate that consumers now associate the name with your product you may be able to get protection.
- And if you can’t demonstrate that consumers generally (it doesn’t have to be all consumers, but it needs to be a lot) associate the name or mark with your product, then you don’t get protection.