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PatentField - Free patent information search site

PatentField is a free patent information search service. It is a collection of patent information on over 45 million patents from Japan and other major countries.

It offers an advanced full-text search service, associative search, and patent family information search, as well as information on the term of patent rights.

Fulltext search

  • You can fulltext search the patent documents of each country.
  • You can see the text of around search keyword in the claim and the description.
  • You can search in combination applicants, inventors, attorneys, patent classifications, etc.
  • You can combine filters by the click operation.
    • Legal status in the search results.
    • Patent family in the search results.
    • Patent classifications, applicants, inventors, attorneys of the top in the search results.
    • Patent classifications, applicants, inventors, attorneys, free words in the search results.
    • Associated Words from the search results.

Associative search

  • You can associative search(*1) the japanese patent documents that are associated with natural sentences.
    - You do not need to know the terminology.
  • You can associative search by the application publication number.
    - You can search the japanese patent documents that are similar to the other japanese patent documents.
  • You can search in combination application year, publication year, applicants, patent classifications.
  • You can combine filters by the click operation.
    • Associated Words from the search results.
    • Patent classifications, applicants in the search results.

*1:Associative search is also referred to as a concept search.

Search menu

Fulltext search

Fulltext search JP patent Fulltext search JP utility model Fulltext search WO patent Fulltext search US patent

Fulltext search CN patent Fulltext search CN utility model

Fulltext search KR patent Fulltext search KR utility model

Fulltext search EP patent Fulltext search IN patent Fulltext search the other forieign patent

Associative search

Associative search A HUMAN NECESSITIES JP patent Associative search B PERFORMING OPERATIONS; TRANSPORTING JP patent

Associative search C CHEMISTRY; METALLURGY JP patent Associative search D TEXTILES; PAPER JP patent

Associative search E FIXED CONSTRUCTIONS JP patent

Associative search F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING; JP patent

Associative search G PHYSICS JP patent Associative search H ELECTRICITY JP patent

Patent infringement investigation

Search survival JP patent

Search survival JP utility model

Search pending JP patent application

Patent-free technology research

Search canceled JP patent

Search withdrawal JP patent application

Search canceled JP utility model

Search withdrawal JP utility model application

Japanese-English bilingual search

Search JP patent application having japanese-english abstract

Search japanese translation of PCT international patent application

Search japanese translation of PCT international utility model application

Search JP patent application having US/WO patent family

English-Japanese bilingual search

Search WO patent application having JP patent family

Search US patent application having JP patent family


Applicant search

JP patent JP utility model WO patent US patent CN patent CN utility model

KR patent KR utility model EP patent IN patent The other forieign patent patent

Inventor search

JP patent JP utility model WO patent US patent CN patent CN utility model

KR patent KR utility model EP patent IN patent The other forieign patent patent

Attorney search

JP patent JP utility model US patent CN patent CN utility model

KR patent KR utility model

Patent classification search

International patent classification IPC/FI Japanese patent classification THEME/FTERM United states patent classification UC

Japan legal status search

Kind of final decision code

Kind of disposition in exam

Cancellation

Parent type

Priority country

Examination information intermediate code

Examination information reason for rejection code

Registration information intermediate code

Trial information intermediate code

Trial information reason for rejection code

Note Note: Patent infringement investigation and patent-free technology research does not guarantee the legal status of the latest.

Cover

Fulltext search

  • Coverage country: JP, US
  • Coverage: Until 2015.12
  • Coverage country: WO, CN, KR, EP, IN, Others
  • Coverage: Until 2013.06

Associative search

  • Coverage country: JP
  • Coverage: 1993-2013.06 Published

Update Information

  • 2014.02 Open test