The International Society for Patent Information Professionals
Search Community Job Board
I have noticed the same thing. You can do a ref/xxx on patft's advanced search page to see what patents cite patent xxx. The patentsview api can also be used. It can return the list of cited_patent_numbers and list of citedby_patent_numbers. Their database is reloaded quarterly, so the citedby_patent_number list isn't always as complete as a ref/xxx search would be. The patentsview data is also available as a bulk download (uspatentcitation on https://patentsview.org/download/data-download-tables).
To all - I have from time to time noticed the USPTO may list Patent A (being a US patent) as a backward citation to Patent B (also a US patent), but not Patent B as a forward citation to Patent A. This is based on data published at the USPTO Patent Full-Text and Image Database, for Patent A and Patent B.
Has anyone else noticed this, and if so, does anyone have any comments on this?
Notice on use of PIUG name and logo:
No one may use the PIUG name or logo for any promotional or commercial purpose or any other purpose without the prior written consent of the PIUG Board of Directors.
Antitrust Policy | Bylaws | Copyright and Disclaimer
© 2023 The Patent Information Users Group, Inc.