A listing of the more commonly used Patent discovery search engines (most are freely available, to all) follows below. All registered patents (and patent applications) are public domain, open-access documents (freely available via Internet). Note there are numerous proprietary and specialized patent search engines on the market (sold as subscription products). Apart from the Engineering Village platform QUT does not subscribe to these. Nearly all QUT scholars and researchers will be able to satisfactorily discover the patents they need by using the freely available search interfaces.
Patent Search Engines