Patents, Trademarks, Copyright and Designs: Which Applies

Ask most people to name a way of protecting an idea and they say "patent". It is the only one of the four that has entered ordinary speech, so it gets asked for by default — including by people whose idea a patent cannot cover, and by people who could have had solid protection for a small fraction of the cost and effort.

There are four main types of intellectual property in general use, and they divide up neatly once you see the split. One covers how a thing works. One covers what it is called. One covers a particular piece of writing, drawing, code or music. One covers what a thing looks like. Getting the right one is not a technicality — it decides how much you pay, how long you wait, how long you are covered, and whether you are covered at all.

The Confusion · Where It Comes From

Why These Four Rights Get Mixed Up So Often

The muddle has a simple cause: in everyday speech we use one word, "idea", for four different kinds of thing. The mechanism inside a device, the name printed on the box, the instruction leaflet folded up inside it and the shape of the casing are all "the idea" to the person who thought of them. The law treats them as four separate objects with four separate owners, four separate registers and four separate clocks.

It is worth resisting one instinct in particular: none of these rights protects an idea in the abstract. Not one. Each protects a specific expression, arrangement, appearance or sign. "A folding travel kettle" is nobody's property. A particular hinge arrangement, a particular name, a particular set of instructions and a particular silhouette are all capable of being owned — separately, and often by different people.

Right One · Function

Patents: The Right That Covers How Something Works

A patent covers function — a mechanism, a process, a composition, a technical way of achieving a result. You describe how it works in enough detail that a competent person in the field could build it, that description is published for the world to read, and in exchange you get roughly twenty years from your filing date during which you alone may make, use or sell what you claimed.

It is the slowest and most expensive of the four. Grant typically takes two to five years. Publication usually happens about eighteen months after your filing date whether or not the application ever succeeds, so a failed application can leave you with your description public and no right to show for it. Renewal fees continue for as long as you keep it alive, and rise over the term. If you want the definition set out formally rather than in my paraphrase, the standard explanation of what a patent is and what it gives you covers the same ground in the official vocabulary.

Choose a patent when the value of your invention is in how it works, when a competitor could copy the mechanism by taking your product apart, and when you can afford the wait. Choose something else when the value is in the name, the look, or the words.

Rights Two and Three · Names and Words

Trademarks and Copyright: Names, Text and Everything Written Down

A trademark protects a sign that tells buyers where something came from: a name, a logo, sometimes a distinctive shape, colour or sound. It does not protect an invention at all. What it protects is the association in a customer's mind between a mark and a source, which is why it is the only one of the four that can last indefinitely — typically registered for ten years at a time, renewable for as long as you keep using it and paying. Registration is comparatively quick and cheap, often a matter of months rather than years.

Copyright protects a particular expression — text, drawings, photographs, software code, music — and in most territories it exists automatically the moment the work is fixed in some permanent form. No application, no fee. Its term is long: commonly the author's lifetime plus several decades. Its limit is severe, and it is the limit beginners trip over most: copyright covers the expression, never the underlying idea. Your assembly instructions are protected. The machine they describe is not. Somebody may read your document, understand the invention completely, build it and sell it, and copyright will not stop them for a moment.

Right Four · Appearance

Registered Designs: The Right That Covers How It Looks

The fourth right is the one hardly anybody asks for and a great many people need. A registered design — called a design patent in some jurisdictions and a registered design in others — protects the appearance of a product: its shape, its pattern, its ornamentation. Not how it works. Just how it looks.

It has three practical advantages over a patent. It is far cheaper, often a small fraction of the cost. It is far quicker, sometimes registered in months because many offices examine it only lightly. And the test is easier: novelty of appearance, without the punishing obviousness examination a patent must survive. Terms vary, but roughly ten to twenty-five years with renewals is a fair expectation.

Its limit is equally clear: a competitor who builds the identical mechanism inside a visibly different casing does not infringe your design registration at all. So a registered design is excellent where the look is the product, and thin where the look is incidental. For anything where the physical form and the function are hard to separate, that boundary needs thinking about early — the argument for treating design and invention as one process rather than two is partly an argument about exactly this overlap.

In Practice · Combinations

One Product Usually Needs More Than One of Them

Real products are rarely covered by a single right. A modest household device might carry a patent on its mechanism, a registered design on its casing, a trademark on its name and automatic copyright in its manual and packaging artwork. Each cost a different amount, arrived on a different date and expires on a different one.

1. Write down what you actually have, in four columns: the mechanism, the name, the appearance, the written and drawn material.
2. Fill in only the columns with real content. An empty column needs no protection and no budget.
3. Rank the filled columns by what a copier would actually take. That is usually the mechanism, occasionally the appearance, and for consumer goods surprisingly often the name.
4. Register in that order, as money allows, remembering that the patent column has the hardest deadline: publicly describing the mechanism before filing can end the right entirely.

That last point is the one to hold on to. Trademarks and registered designs are forgiving about timing in a way patents are not, and copyright arrives on its own. So among the four types of intellectual property, the patent is the one whose window can be closed by a single careless conversation — which is why the plain sequence for protecting an invention puts silence immediately after writing the idea down and well before any spending.

None of this is a substitute for advice on your particular case, but it does let you have that conversation as a participant rather than a passenger. Inventors who understand which right they are buying ask better questions and waste much less money. The habit of looking at a problem from an unfamiliar angle helps here as well; there is a reason people describe speculative fiction as a genuine source of invention — the useful move is often to stop asking what exists and start asking what the thing is for.

Four rights, four jobs: how it works, what it is called, what was written, how it looks. Name yours correctly and everything after that gets cheaper.