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Free Patent Search Sites

Free resources for searching granted patents and published applications.

Espacenet is a free search service offered by the European Patent Office (EPO). The major data source used by Espacenet is the DOCDB bibliographic and legal status data file, which is also used to create the bibliographic backbone of most commercially available subscription databases. Read the full System Report at Intellogist: www.intellogist.c...

Taiwan's national patent office offers a free English-language search of Taiwan published applications, granted patents, designs, and utility models. Read the full Community Report at Intellogist: www.intellogist.c...

The State Intellectual Property Office (SIPO) of the PRC (People's Republic of China) offers a free English patent search interface for invention and utility models. Read the full Community Report at Intellogist: www.intellogist.c...

Nordiska Patent 2.0 is a free, web-based Swedish patent search system created by the company Uppdragshuset AB. Read the full Community Report at Intellogist: www.intellogist.c...

Zhihuiya.com is a free Chinese patent search site, created by Wisdom buds Information Technology (Suzhou) Co., Ltd, which allows users to search US patents, Chinese patents (including design and utility model), EPO patents and applications, PCT applications, Korean patents, Japanese patents, and Norwegian patents. Read the full Community Report at Intellogist: www.intellogist.c...

The Israeli Patent Office Search is a search system offered by the Israeli Patent Office for searching Israeli patent applications. Read the full Community Report at Intellogist: www.intellogist.c...

The Japanese Patent Office (JPO) offers the Industrial Property Digital Library (IPDL) as a service to those wishing to search the Japanese patent art. Read the full Community Report at Intellogist: www.intellogist.c...

KIPRIS is a patent search service for Korean documents provided by KIPO, the Korean Patent Office. Read the full Community Report at Intellogist: www.intellogist.c...

The USPTO Website hosts searchable full text collections for US published applications and granted patents. Read the full Community Report at Intellogist: www.intellogist.c...

Patexia is a "a privately-held company based in Los Angeles" that released a free version of it's IP Research database and visualization tools on their website. Read the full Community Report at Intellogist: www.intellogist.c...

PatentStorm is a database of "full-text U.S. patents and patent applications from the U.S. Patent Office," and the "database contains issued patents (including utility, design and plant patents) back to 1976, and yet-to-be approved patent applications back to 2005." Read the full Community Report at Intellogist: www.intellogist.c...

Patent Genius is a free patent search system that "has full text patent descriptions, lists of patents by inventor and companies that hold patents, the ability to view all patents in any class or category," and allows users to browse patents by category (US classification), inventor, patent holder, patent number, or date (1976 onwards). Read the full Community Report at Intellogist: www.intellogist.c...

iPairs, the Indian Patent Information Retrieval System, is a free search portal launched by the Indian Patent Office. Read the full Community Report at Intellogist: www.intellogist.c...

AusPat is the Australian patent search engine from IP Australia, replacing the older PatAdmin and Patsearch systems. Read the full Community Report at Intellogist: www.intellogist.c...

Latipat is a search system running on the old Espacenet platform that searches "the information of patents in Spanish and Portuguese." Read the full Community Report at Intellogist: www.intellogist.c...

The IpXnase search engine provides a free cross-lingual search of patent text and patent families. Read the full Community Report at Intellogist: www.intellogist.c...