Burdlaw.com Patent Searching Links

Types of Patent Search  

• Bibliographic Search - to find patents by an inventor or entity

• State of the art Search – to find the latest patents in a technological area

• Patentability Search – to locate prior art which might indicate obviousness

• Knock-Out Search - to find identical prior inventions

• Continuing Search – to update prior search

• Infringement Search – to locate patent claims of possible relevance

• Freedom to Use Search – to locate absence of patent claims coverage

• Validation Search – to find more prior art to enhance validity of a patent claim

• Rights Termination Search – to find patent errors or more prior art to kill a patent

• Family search – to locate foreign equivalents of patent

• Legal status search – to find current owner, if fees paid and if reissued or challenged

• Competitor search – to find patents published to a competitor

• Citation search – to find where and how often a patent is cited

Link

Website

Comment

http://www.google.com/advanced_patent_search

Google Patents beta – advanced search

Advanced form of Google patents. Great for novice searches. Ranks results by relevance. Has quick and easy access to drawings and other parts. Very fast.

www.freepatentsonline.com

Free Patents Online

Great site for experienced searches. Register first as registration is free and allows you to get the free patents online. Fast and easy to use. Gives html and pdf images. Ranks patents by relevance. Has simple search or advanced search. Also allows searching of published applications, Japanese abstracts, European patents and international (WIPO) patents.

http://patft.uspto.gov/

USPTO

Cumbersome, but most comprehensive for US only searching. Uses tiff images

http://www.delphion.com/

Delphion patent searching

$278/month for unlimited searching. For expert searchers. Most comprehensive and sophisticated. Good at patent family searching. Not for novices

http://www.patentcafe.com/index.asp?body=products&page=patentresearch

PROSEARCH™ LSA Patent Research

Sophisticated for professional searchers and corporations. Expensive. Top-notch search results. Not for novices.

http://www.wipo.int/pctdb/en/

WIPO Patent Database

Free

http://ep.espacenet.com/?locale=en_EP

Esp@ceNet (EPO)

Free

http://www.irossco.com/patentsearching.htm

Additional Links

A very comprehensive listing of additional links.