Use patent precisely in IP contexts. A patent covers inventions (products and processes); it is distinct from copyright (creative works), trademark (brand names and logos), and trade secret (undisclosed information). Specify 'utility patent', 'design patent', or 'plant patent' if the type matters.
| Incorrect | Correct |
| She patented the name of her company. | She trademarked the name of her company. (names are protected by trademark, not patent) |
| The author's book is protected by patent. | The author's book is protected by copyright. (creative works = copyright, not patent) |
Use patent as a verb when describing the act of seeking or obtaining patent protection: 'they patented the process', 'she is trying to patent her design'. Note that software algorithms and abstract ideas generally cannot be patented in most jurisdictions.
| Incorrect | Correct |
| He patented the idea of one-click purchasing. | A pure idea cannot be patented — only a specific technical implementation. Amazon's one-click patent covered the particular technical implementation, not the concept itself. |
| They patented the book's title. | They trademarked the book's title. (titles are not patentable) |
The adjective patent (meaning obvious) is formal and slightly old-fashioned. It typically precedes a noun: 'patent nonsense', 'patent absurdity', 'patent lie'. It can also be used predicatively: 'the error was patent to all'.
| Incorrect | Correct |
| It was a blatant error because everyone could see it. | It was a patent error — everyone could see it. (patent = plainly visible; blatant = brazenly done) |
In IP law, patent is a noun or verb for the exclusive right to an invention. As an adjective, it means plainly obvious — usually applied to something negative. Do not confuse patent with copyright or trademark, which protect different types of intellectual property.
Patent (IP right) is often confused with copyright and trademark — they protect different things. The adjective patent (obvious) is sometimes confused with blatant (brazenly done) or flagrant (offensively obvious).
From Latin patēre ('to lie open, be accessible'), via the past participle patens ('lying open'). The noun entered English through Anglo-French lettres patentes ('open letters') — royal grants addressed to the general public rather than a specific recipient, as opposed to lettres closes ('sealed/closed letters'). The IP noun and verb senses descend from this tradition of publicly declared exclusive grants. The adjective sense 'clearly obvious' is directly from the Latin root meaning 'open, evident'.
What is a patent?
A patent is a government-granted exclusive right that allows an inventor to control who makes, uses, or sells their invention for a set period — typically 20 years. In exchange, the inventor publicly discloses how the invention works, adding it to the body of human knowledge.
What is the difference between a patent, copyright, and trademark?
A patent protects inventions (products and processes). A copyright protects original creative works such as books, music, and software code. A trademark protects brand identifiers such as names, logos, and slogans. They are three distinct branches of intellectual property law.
What does 'patent' mean as an adjective?
As a formal adjective, patent means plainly obvious or unmistakable — usually applied to something negative: 'a patent lie', 'patent nonsense', 'patent absurdity'. This sense comes directly from the Latin root meaning 'open, visible'.
Can you patent an idea or algorithm?
Generally no. Abstract ideas, mathematical formulas, and laws of nature cannot be patented in most jurisdictions. A specific technical implementation or application of an idea may be patentable, but the idea itself is not. Software patents are a complex and contested area.
What does 'patent pending' mean?
'Patent pending' means that a patent application has been filed but not yet granted. It puts competitors on notice that a patent may be issued and that retroactive damages could apply. It does not itself confer any legal rights.