How to check for existing patents

There are two good reasons why you should conduct a search to see whether a similar invention has already been developed or published, before you apply for or market your invention:

1. Checking both New Zealand and overseas patents can help you decide whether to continue with your invention.
2. It can also alert you to the possibility that your invention may infringe an existing patent. The owner of that patent could take legal action against you should you try to use or continue with it.

As well as searching existing and previous patents, you should make a point of searching any relevant journals, magazines or textbooks.
 

Where can I find information on patents and inventions?

1. Start by searching the IPONZ Patent Register for similar or identical patents.
2. Use Internet search engines to identify patent databases you can search for overseas patents. For example the United States Patents and Trade mark Office, the World Intellectual Property Office and the European Patent Office.
3. In addition to New Zealand patents, IPONZ offers a range of overseas patent information. See our list of New Zealand accession dates for overseas patent specifications.
4. Contact or visit a library. New Zealand libraries hold a wide range of technical material and trained librarians who can assist you in your search. 

Though the database includes the records of all current patents, patents pending application and many ceased patents, most of the records prior to 1983 are not available on this database. A search for these records can be carried out on request by completing the Information request form.

Please note: This information is intended to be a guide only. For legal advice, we recommend that you contact a patent attorney familiar with intellectual property law.