These databases index scholarly journal and conference articles in engineering and technology subjects. Click the "Get it at UC" button to link out to the full text of the article if Berkeley has a subscription, or to the catalog to find a print copy if there is no online copy.
For more engineering-related indexes, see our full list of Engineering databases.
Use UC Library Search to find books, ebooks, journals, conference proceedings, videos and more.
Log in to UC Library Search in order to request items checked out by another patron or held in storage, renew your checked-out items online, or initiate an interlibrary loan request for items held outside the UC Libraries.
For materials not owned by UC Berkeley: Borrowing from Other Libraries.
Find ebooks in UC Library Search by using the Refine your results options to limit to Available online.
Many publishers also allow full text searching of their ebooks on their native platforms. The following are major science publishers from which UC Berkeley has purchased ebooks:
Or, browse all available ebook collections in all subject areas at UC Berkeley.
Not happy with your results? Watch our video to learn how to:
A US patent is a property right granted to an inventor "to exclude others from making, using, offering for sale, or selling" the invention in the United States or "importing" the invention into the United States for a period of 20 years from the date of application. (USPTO)
United States Patents
PatFT (United States Patent and Trademark Office)
US patents granted since 1976, and the patent number, issue date, and current US classification for all patents granted from 1790 through 1975.
AppFT (United States Patent and Trademark Office)
US published applications (including new utility and plant) since 2001.
Google Patent Search
US patents from 1790 to the present, excludes patents issued in the most recent months and published applications. Note: Unclear exactly what is included in search. Keyword search only - classification search unavailable.
Espacenet (European Patent Office)
1836 to present for ~180 countries, including the United States.
Search data from the World Intellectual Property Organization, European Patent Office, U.S. Patent Office, and the Australian Patent Office.
World Intellectual Property Organization (WIPO)
A special United Nations agency formed in 1967 "to promote the protection of intellectual property throughout the world through cooperation among the states." Search international patent applications.
Classification Systems Help
Cooperative Patent Classification System - scheme and definitions.
IPC Catchword Index - index of common language terms mapped to International Patent Classification terms.
A quick guide to patent research from the University of Michigan.
For more information about finding patents, see the Library's US Patent and Trademark Information guide.
Primary sources in the physical sciences are documents that provide a description of the original research. They haven't been filtered by a second party (other than peer review) and they tend to come first in the publication cycle. A secondary source will contain commentary on or discussion of a primary source.