A patent is a time-limited, government-granted monopoly over the way an invention works. In Australia, a granted patent gives you the exclusive right to exploit your invention, which in practice means you can stop others from making, using, selling or importing it without your permission. In return, you publish exactly how the invention works, so that once the patent expires anyone is free to use it.
This guide explains what a patent is, what rights it actually gives you, and the four tests your invention must pass to be patentable. It then walks through a worked example so you can see the system operating, names the misconceptions that most often cost Australian businesses their rights, and sets out where a patent attorney and a lawyer fit into the process.
What a patent actually gives you
Under s 13 of the Patents Act 1990 (Cth), a granted patent gives the patent holder the exclusive right to exploit the invention and to authorise others to do so for the life of the patent. Exploitation covers the commercial acts that matter: making the product, using the method, selling or importing the invention. Nobody can do those things in Australia without your permission, even if they arrived at the same design completely independently. Unlike copyright, there is no independent-creation defence to patent infringement.
Three features of that right are worth understanding before you invest in the process:
- Term: A standard patent lasts 20 years from the filing date under s 67 of the Patents Act 1990 (Cth). Patents for certain pharmaceutical substances can have the term extended by up to 5 years under s 70 to s 77, so a maximum of 25 years. The cheaper second-tier right, the innovation patent, was phased out from 26 August 2021, so a standard patent is now effectively the only option for new filings.
- Territory: An Australian patent is enforceable only in Australia. If you want protection overseas, you must file in each country you care about, usually by starting with an international (PCT) application that preserves your rights across many countries while you decide where to continue.
- The bargain: A patent is published. In exchange for your monopoly, your specification must explain the invention clearly enough for a skilled person to perform it, and the claims at the end of the specification define exactly what you own. Anyone can read your patent and design around it; the claims are the fence line.
What can be patented: the four tests
The tests are set out in s 18 of the Patents Act 1990 (Cth). An invention is a patentable invention only if it is a manner of manufacture, novel, involves an inventive step and is useful. Each test is applied against the state of the art as it existed before your priority date, which is the date you first filed for the invention.
A manner of manufacture
Australian patent law descends from the Statute of Monopolies 1623, and s 18 still requires an invention to be a manner of manufacture within the meaning of section 6 of that statute. Since National Research Development Corporation v Commissioner of Patents (1959) 102 CLR 252, Australian courts have treated this as a broad but real limit: the invention must create an artificially created state of affairs with economic significance, rather than being a mere scheme, an abstract idea or a discovery about how the world already works. Pure business methods and mathematical methods are not patentable, and artistic works are protected by copyright rather than patents.
Software-related inventions can be patentable, but only where they solve a technical problem. In Aristocrat Technologies Australia Pty Ltd v Commissioner of Patents [2022] HCA 29, the High Court held that a computerised gaming system which did no more than implement game rules on generic computer hardware was not a manner of manufacture. The test looks at the substance of what you are claiming, not the label attached to it.
Novelty
Under s 7 of the Patents Act 1990 (Cth), an invention is novel only if it has not been made publicly available anywhere in the world before the priority date. The prior art is global, and it includes documents, products, videos, trade show demonstrations and anything else that disclosed the invention. If a single earlier document or product discloses your invention, your application fails, no matter how independently you developed it.
An inventive step
A new invention still fails if it would have been obvious to a person skilled in the relevant field. Section 7 asks whether the invention would have been obvious to a skilled person in the light of common general knowledge, considered together with prior art. The hypothetical person skilled in the art is well informed but not inventive: if that person would have arrived at your invention without ingenuity, the inventive step is missing. Small, incremental improvements that any competent engineer would reach are routinely rejected on this ground.
Useful
The invention must be useful, meaning it works as described and delivers the promised result. A claim that describes a device that cannot function, or a method that does not achieve what the specification says it achieves, will not survive examination.
The specification itself must do the heavy lifting. Under s 40 of the Patents Act 1990 (Cth), it must disclose the invention clearly enough and completely enough for a person skilled in the relevant art to perform it, must disclose the best method known to the applicant, and must end with claims that are clear, succinct and supported by the description. If the drafting is thin, the damage is hard to repair later, because amendments after filing are constrained.
A worked example: the irrigation coupling
A Tasmanian manufacturer of farm irrigation fittings develops a quick-release coupling that seals without tools and copes with higher water pressure than anything on the market. The founders suspect they have a patentable advance and they are probably right, but the clock is already running.
Before showing the coupling to a distributor at a field day, the manufacturer files a provisional application with IP Australia. A provisional application is not examined and offers no enforceable protection, but it establishes a priority date and buys 12 months to decide whether to continue. During that window the manufacturer commissions a patent search, builds a working prototype, and files a complete application within the 12-month period under s 38 of the Patents Act 1990 (Cth), with claims drafted to cover the sealing mechanism and the high-pressure method, not just the exact shape of the first prototype.
IP Australia examines the complete application. Once granted, the patent lets the manufacturer stop a competitor importing a similar coupling for up to 20 years. If a competitor does appear, the options run from a letter of demand, to a negotiated licence, to proceedings in the Federal Court.
Notice what the patent does not cover. The manufacturer's brand name needs a trade mark, the visual styling of the product needs a registered design, the know-how around manufacturing tolerances can be kept as a trade secret, and the business model of leasing couplings is a business method, which is not patentable at all. Most successful businesses run several of these rights in parallel.
Common misconceptions about patents
A handful of misconceptions recur so often that they routinely cost Australian businesses their rights:
- "I can patent an idea": An idea on its own is not patentable. You need an invention that meets the four tests and a specification that shows a skilled person how to make it work. A patent protects an implementation, not a thought.
- "An Australian patent protects me overseas": It does not. An Australian patent is enforceable only in Australia. To protect your invention in other countries you must file there, and for most applicants that starts with a PCT application filed within 12 months of your first filing.
- "The grace period means I can publish first and file later": Section 24 of the Patents Act 1990 (Cth) does allow certain disclosures made by you, or derived from you, to be disregarded, but only in prescribed circumstances and only if a complete application is filed within the prescribed period. Any disclosure by a third party who did not obtain the information from you counts against you. Relying on the grace period is a gamble; filing first is the only safe path.
- "Once I have filed, I am protected": A provisional application secures a priority date but gives no enforceable rights. You can only sue for infringement once the patent is granted, and your application can still fail at examination. Filing early protects your date, not your position.
- "A patent lasts forever": A standard patent lasts 20 years from filing, or 25 for certain pharmaceuticals, and then the invention falls into the public domain. Renewal fees keep the patent alive in the meantime; if you let them lapse, the right dies early and cannot be revived.
- "Copyright protects the way things work": Copyright protects the expression of an idea, such as code, drawings and manuals, and it arises automatically in Australia. It does not protect function. If a competitor copies how your product works, only a patent can stop them.
When you need a patent attorney and what they do
Patent drafting is a technical legal skill, and the choices made in the first few months determine the scope of the monopoly you end up with. A registered patent attorney conducts the prior art search, drafts the specification and the claims, files the provisional and complete applications, responds to examination reports from IP Australia and manages the renewal process. A claim that is drafted too narrowly is easy for competitors to design around; a claim drafted too broadly will be rejected or struck down later. Getting that balance right is the core of the profession.
An intellectual property lawyer handles the parts of the process that are about people and money rather than technology: making sure the business owns inventions created by employees and contractors, drafting assignments and licences, and advising on enforcement strategy. Because a patent application is usually drafted once and never improved, the cost is heavily front-loaded. Budget for each stage, from drafting and filing through examination and annual renewal fees to any overseas filings, and tie go or no-go decisions to commercial milestones such as proof of demand or a signed customer.
The question to answer before you show anyone
A patent is only as good as the priority date behind it, and that date is set by your first public disclosure as much as by your filing. The mistake that costs Australian businesses the most is not filing too late; it is disclosing too early, often in an informal conversation with a supplier, an investor or a potential customer. Once that information is out in the world, no amount of skilled drafting can put novelty back in the bottle, except in the narrow grace period cases.
So before you brief anyone on your invention, answer one question: can you name the date of your first disclosure of the invention to anyone outside your business, and was it before or after you filed? If you cannot answer it, treat the invention as disclosed, and get professional advice on what can be salvaged before you spend money on a filing that may already be doomed.