Where can I perform a patent search?

Patent search can be performed in free and paid patent databases. Patent search can be done in almost all official patent databases.

Some of the free databases are,

  • google patents (Coverage US, EP, WIPO, CN documents)
  • freepatentsonline(Coverage US, EP, WIPO, Japan, German documents)
  • USPTO (US documents)
  • espacenet (EP documents)
  • WIPO (PCT documents)
  • SIPO (Chinese documents)
  • IPDL (Japanese documents)

Some of the paid databases are,

  • Totalpatents (Coverage)
  • Questel Orbit (Coverage)
  • Relecura
  • Thomson Innovation