
If you are looking to find a patent number in Australia, there are several ways to go about it. You can search the National Archives of Australia website, or the AusPat database, which is IP Australia's search database that allows users to access patent applications lodged and granted in Australia. You can also search the State Library of Victoria, which holds print and microfiche copies of Australian patents from 1904 to 1999. If you know the nature of the invention, you can narrow down the possible year and use the subject indexes to verify the patent number and date. Additionally, patent offices assign a filing or application number when they receive an application, so you can use this to search for the patent number.
| Characteristics | Values |
|---|---|
| Patent Number Format | AN US 80-207592 (where AN indicates Australia) |
| Patent Number Allocation | All patent offices assign a filing or application number when they receive an application |
| Patent Number Search | Search by patent number on the National Archives Recordsearch |
| Patent Databases | AusPat, IP Australia, National Archives of Australia, Google Patents |
| Patent Number Search Filters | Number, title keyword, abstract, full specification, application number, inventor name, patent classification, date |
| Patent Number Formats | Barcodes (for some years) |
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What You'll Learn

Search the AusPat database
The AusPat database is a useful resource for searching Australian patents. It is free to use and offers full specifications for patents. However, it is worth noting that not all patents are available on AusPat, particularly some early twentieth-century patents.
To search the AusPat database, you can use the Quick Search function, which allows you to search by multiple criteria, including:
- Patent number
- Invention title
- Applicant
- Inventor
- Agent
- Keyword in the abstract
Additionally, you can use the "Include abstract text" checkbox to search by keywords in the abstract. The abstract may contain information such as the application for the patent, complete specification, and correspondence related to the examination of the application.
If you are searching for older patents, it is important to note that Australian patent records before 1904 were organised differently. Until 1904, each Australian state had its own patent office. Therefore, for patents before 1904, you may need to search the records of the relevant state's patent office. For example, the State Library of New South Wales provides access to patent records from 1854 to 1904, organised by name and subject, including patent numbers.
When searching the AusPat database, you can also use advanced search techniques, such as wildcards and logical operators, to refine your search. For example:
- Wildcard ( or ?) - The wildcard replaces zero or more characters, while ? replaces exactly one character.
- Logical operators (AND, OR, NOT) - These operators allow you to include or exclude specific terms in your search.
Additionally, you can subscribe to receive email notifications about updates to specific patent cases by inserting the application numbers and providing an email address.
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Search the National Archives of Australia website
The National Archives of Australia website can be searched to find patent numbers. The Archives hold records of Commonwealth patents lodged from 1904 onwards. The patent number can be found by searching the National Archives Recordsearch using the series number A4616.
To search for patent numbers, select the hyperlinked number next to the 'Items in this series' column. This will bring up specifications of inventions for Letters Patent granted between 1887 and 1904 for New South Wales. This series contains office copies of original specifications sent to the Office with a petition asking for the grant of a Letters Patent.
The National Archives Recordsearch can also be searched by selecting 'Advanced Search' and then 'Series Search'. Use the series number A1075. Then, click on the title to learn more about the item. This will bring up the Letters of Registration of Inventions at the Library.
The National Archives in Canberra can also be searched for their holdings of the series of Australian Patents, and a limited number of listings of particular selected patents by name, date, and keywords. The Australian official journal of patents, trade marks, and designs have concordances showing lists of application numbers and their six-figure granted patent numbers.
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Search the State Library of Victoria
The State Library of Victoria holds print and microfiche copies of Australian patents from 1904 to 1999. The library also has microfiche patents covering the period 1857 to 1904, with the microfiche indexes covering 1854 to 1904.
If you know the patent number, you can order the microfiche (MF 367) to view and copy in the library. When ordering, include the patent number and year. If you don't know the patent number, you can search the microfiche name and subject indexes to Victorian patents. The State Library's Victorian patent indexes cover 1854 to 1904, but the subject indexes only cover the years 1854 to 1893.
You can also search the Victorian Government Gazette Online Archive 1836-1997 to find the patent number, but not the full text of the patent. It is recommended that you search the Victoria Government Gazette online archive website before you search Austlii.
If you are searching for a patent from outside Victoria, you will need to determine the relevant geographic location and year or range of years. If there are names or numbers on the part, patent indexes can be checked to identify the relevant patent. If a geographic location cannot be established, search indexes from a range of states and countries.
If you cannot find the patent, search library catalogues for published guides to machinery, such as Old Farm Machinery in Australia: A Field Guide & Source. If you still cannot find the information you need, you can send an online enquiry on the State Library of Victoria website.
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Search the State Library of New South Wales
The State Library of New South Wales holds a very small patent collection, all of which is in offsite storage. The library has the following patent records:
- Letters of Registration of Inventions 1854-1884: This contains specifications, drawings, and diagrams. It is organised by patent number, so if you don't know the patent number, you will need to search the indexes.
- Applicants and applications for N.S.W. letters patent: Index 1898-1904: Organised by name and subject and includes patent number. No drawings.
- Letters of Registration of Inventions 1854-1884: Prior to the Patents Law Amendment Act of 1887, these letters played the role of patents registration in Australia. It is organised by patent number, so if you don't know the patent number, you will need to search the indexes.
- Name index of grantees of New South Wales letters of registration, 1854-July 1887: Contains the names of grantees, published by the New South Wales Patents Office.
- Applicants for NSW letters patent name index, 1887-1900: Digitised index held in the National Archives of Australia.
- Register of Applications for New South Wales Provisional Certificates and Letters Patent, 1887-1913: Ordered by patent number.
To find patent records from 1904 onwards, you can search the National Archives Recordsearch by selecting Advanced Search and then Series Search. Use the series number A1075. You can also search the IP Australia AusPat database.
The State Library of Victoria also holds some nineteenth-century patent indexes and abridged patents for New South Wales.
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Understand patent numbers and application numbers
Patent numbers and application numbers are essential components of the patenting process, providing unique identifiers for patent applications and granted patents. Understanding these numbers is crucial for effective patent searches and ensuring the protection of inventions.
A patent number is a unique identifier assigned to a patent application when it is published by the issuing patent office. It serves as a critical indicator that a product or invention is protected by a patent, giving the patent owner exclusive rights to the invention and preventing others from using it without a license. Patent numbers are typically inscribed on commercial products or included in product documentation to signify ownership and deter unauthorised copying. The format of a patent number can vary depending on the issuing office and the type of patent application. However, it generally includes a combination of sections, such as a country code, type/class code, year identifier, unique serial number, and kind code.
On the other hand, an application number refers to the identifier assigned to a patent application before it is published or granted. The format of an application number can differ from that of a patent number. For instance, in the United States, application numbers typically follow the format of "US XX/XXX,XXX", where the number before the slash indicates the year of publication, while the number after the slash differs from both the patent and application number. Application numbers are essential for tracking the progress of a patent application through the patent office and maintaining confidentiality during the application process.
In Australia, patent records and searches are facilitated by organisations such as the State Library of Victoria, the National Archives of Australia, and IP Australia's AusPat database. The National Archives holds records of Commonwealth patents lodged from 1904 onwards, providing a valuable resource for patent searches. The AusPat database offers search capabilities based on multiple criteria, including patent and application numbers, invention titles, inventors' names, and date ranges. Additionally, the State Library of Victoria assists in identifying patent numbers and retrieving the corresponding patents from storage.
It is important to note that patent offices may change their numbering systems over time, resulting in different formats for patent and application numbers from the same office across various time periods. Therefore, when searching for patent information in Australia or other jurisdictions, it is advisable to consult the relevant patent office or utilise reputable patent search tools and databases.
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Frequently asked questions
You can find patent numbers from 1904 onwards on the National Archives Recordsearch. Use the series number A1075 to search by patent number or A4616 to search by the name of the inventor.
Patent numbers from before 1904 can be found in the Applicants and applications for N.S.W. letters patent: Index 1898 - 1904. This catalogue record is organised by name and subject and includes patent numbers.
You can search for a patent using its number on the AusPat database. You can also search the National Archives of Australia website.
Australian patent numbers are in the format "AU-A" or "AU-B".











































