Google Patents Search and read the full text of patents from around the world with Google Patents, and find prior art in our index of non-patent literature
Search for patents | USPTO Find existing patents, published patent applications, and other published patent documentation
Espacenet – patent search Espacenet provides free access to over 120 million patent documents worldwide, enabling users to search, download, compare, and translate patents
WIPO - Search International and National Patent Collections This patent search tool allows you not only to search the PCT database of about 2 million International Applications but also the worldwide patent collections This search facility features: flexible search syntax; automatic word stemming and relevance ranking; as well as graphical results
Google Patents Advanced Search Search and read the full text of patents from around the world with Google Patents, and find prior art in our index of non-patent literature
Patent Public Search | USPTO The Patent Public Search tool is a web-based search application for patents and patent application publications Patent Public Search has two user-selectable modern interfaces that provide enhanced access to prior art
Searching - Google Help After you begin your search, your search query is displayed on the left side of the page The "Search Terms" section contains text keywords that match patent title, abstract, claims and
Google Search the world's information, including webpages, images, videos and more Google has many special features to help you find exactly what you're looking for