Trademarks, copyright, designs and patents all deal with the protection of different types of intellectual property but they are quite different.
Trademarks protect the branding of goods or services. Words, logos, taglines and even things like smells, shapes, tastes and sounds can be registered as trademarks.
Copyright protects the original content that a person creates. Works like a book, a movie, the lyrics of a song, a podcast, a how-to video on YouTube or the code in software may attract copyright protection. Copyright gives the owner (or someone with the owner’s licence or permission) the exclusive right to reproduce the work and to stop other people reproducing the work.
Designs protect the overall visual appearance of new and distinctive whole products. A registered design does not protect the way the product works. But if you designed a new shape for a dishwasher tablet or a skirt with ruffles or the cut or decorative pattern on a shirt and the design is unique, it can be registered. If you have a registered design, you can stop an unauthorised person from reproducing a product with the same design or appearance.
Patents protect a new invention, whether it’s a new device or process or substance. It must be new, inventive and useful. A patent cannot protect an idea. Patents protect how an invention works or functions. For example, in the field of heart medicine, there could be patents protecting new technology for detecting irregular heartbeats and patents on the way a new medication functions to repair heart muscle and devices for treating those irregular heartbeats. The owner of a registered patent can stop an unauthorised person from producing a product that functions in the same way that the patented product functions.