Useful patent, copyright, and trademark links

Just getting started with IP? Here are some useful patent, trademark, and copyright sites. Although these links are provided as a convenience, patent, copyright, and trademark laws are complex and tricky. It is best to get professional assistance (e.g. call me) before making major decisions.

USPTO Patent Flowchart
Good overview of basic patent filing strategy

Check the status of (published) pending patents

USPTO Patent Application database
See if a US patent application has published yet

Google Patent Search
Google's US patent search engine

WIPO Patentscope
Check for international (PCT) patents and patent applications

Hague Express
Search for International Design patents

PCT Time Limit Calculator
Check time remaining for various international patent deadlines

USPTO Trademarks
Basic information about trademarks, access to TESS US trademark search

WIPO Madrid
Initial check for international trademarks

US Copyright Office
Information about copyrights
Check feasibility of terminating your previous copyright transfer

Open Source Licenses
Various popular open source software licenses

Public access to US Federal Court records (e.g. IP litigation)

IP News
Our daily newsletter covering recent IP developments

Stephen Zweig, Patent Attorney,
California, Silicon Valley, San Francisco, Cupertino, Fremont, Sunnyvale, Mountain View