"Patent," "trademark," and "copyright" get used almost interchangeably — but they protect completely different things. Pick the wrong one and you can spend money guarding something that was never at risk, while leaving your real asset exposed.
Here's the plain-English version of all three, and how to tell which one your idea needs.
The one-line difference
Protects how something works — an invention, device, process, or method.
Protects how you're identified — a brand name, logo, or slogan.
Protects what you create — writing, art, music, code, and other original works.
Patents: protecting inventions
A patent covers a new, useful, and non-obvious invention — a physical product, a machine, a chemical formula, or a method of doing something. It gives you the right to stop others from making, using, or selling your invention for a set period (up to 20 years for a utility patent).
Patents are the right tool when your edge is how your thing works: a new mechanism, a technical process, a device nobody else has. They're also the slowest and most involved to get — which is exactly why a provisional patent is a popular first step to lock in a filing date while you keep building.
Trademarks: protecting your brand
A trademark protects the words, names, symbols, and logos that identify your product in the market — think the brand name on the box, not the invention inside it. It stops competitors from confusing your customers with a similar name or mark.
Trademarks can last indefinitely as long as you keep using them. They're what you want when your value lives in your name and reputation — but note a trademark does nothing to stop someone from copying the underlying product; it only stops them from copying your branding.
Copyrights: protecting creative work
Copyright protects original works of authorship the moment they're fixed in a tangible form — books, articles, photos, music, videos, and yes, source code. It stops others from copying or distributing your specific expression, though not the underlying idea.
This is why code is usually a copyright matter, not a patent one: the exact code you wrote is copyrighted automatically, but the functional method behind it might be patentable. They protect different layers of the same product.
Many products use all three at once — a patented invention, sold under a trademarked name, with copyrighted packaging and code.
This is general information, not legal advice. Specific cases can differ.
If it's a patent you need, start here
Once you know your invention needs patent protection, AutoInvent turns your idea into patent-style text and sketches and guides you step-by-step through filing your provisional yourself with the USPTO — idea to filed provisional in under 10 minutes, for a couple hundred dollars plus the USPTO fee. Lock in "patent pending" while you sort out the branding and everything else.