Google Patents includes over 120 million patent publications from 100+ patent offices around the world, as well as many more technical documents and books indexed in Google Scholar and Google Books, and documents from the Prior Art Archive.
We currently index full-text documents from the following patent offices:
United States, Europe, Japan, China, South Korea, WIPO, Russia, Germany, The United Kingdom, Canada, France, Spain, Belgium, Denmark, Finland, Luxembourg, The Netherlands, Austria, Australia, Brazil, Switzerland, Taiwan
[特徴]
・リストと公報同時表示と、次公報のインクリメント閲覧（300件まで）
・画像表示
・アジア系・ドイツ系等公報テキストの英訳
・近接演算（近接による件数低減でなくランキング上位に）
・csv出力（300件以内が安全）
・searchable PDF 出力
[注意] 近接演算（NEAR、ADJ、WITH、SAME）は、ヒット数を少なくするのではなく、SORTがRelevance時に、ランキングで上位に表示させる機能です。
[注意] 表示結果総数が301件以上はwebで査読ができず（次公報への矢印が出ない）、csvのダウンロードで後のダウンロードが不完全になります。
（2019.8.21時点）
Counts are approximate.
Last Updated: Aug 7, 2019
Check out the latest stats on the Lens patent data (coverage, date range, and various accessible metadata). Updates are performed on a 3-4 week basis at the present time.
Counts are approximate.
117.2M Patent Records
105 Jurisdictions
64M Patent Families
3.9M resolved scholarly citations
313M resolved biological sequences
Further breakdown of 115M patent records:
The European Patent Office’s DocDB bibliographic data from 1907 - present: 81+ Million documents from nearly 100 jurisdictions.
USPTO Applications from 2001 – present with full text and images.
USPTO Grants from 1976 – present with full text and images.
USPTO Assignments (14+ Million).
European Patent Office (EP) Grants from 1980 – present with full text and images.
WIPO PCT Applications from 1978 – present with full text and images.
Australian Patent Full Text from IP Australia
[特徴]
・stemming、近接演算
・検索式履歴、検索式保存
・検索データ保存（最大10,000件）、保存データ同士の加算・減算
・csv出力（最大50,000件）
・searchable PDFの出力
Latest bibliographic coverage
Snapshot date: 21.8.2019
Total count: 115.015.906
Latest full-text coverage
Snapshot date: 21.8.2019
Total count: 90.652.022