Report:Delphion/Data Coverage/Patent Coverage/Full Text Coverage/United States (US)
|Report||Patent Coverage Map||Ratings||Comments|
|This search system report was created by the Intellogist Team and is available for viewing only. If you'd like to share your knowledge on Intellogist, please visit the Best Practices, Glossary, or Community Reports pages. Registered users may be notified of any substantial changes to this report by placing a "watch" on the Revisions page, which is the last page listed in the table of contents. To learn more about using the Intellogist "watchlist," see the Watchlist Help page.|| |
|DWPI on Delphion is no longer available, as of March 31, 2012. DWPI data is available on the Thomson Innovation platform.|
Full text and images of US published applications are covered from March 2001. As with all collections, once published, the application is not removed from the database even if it becomes an issued patent.
Delphion contains searchable full text for US granted patents from 1971 and an active collection of images from 1974. The system also maintains a backfile of bibliographic information and patent images back to the 1790s. Notably, Delphion does not contain full-text records for US patents from before the 1970s - even the bibliographic information is not likely to contain a searchable title or abstract. This is a disadvantage for those users wishing to keyword search for mechanical subject matter, a field that has existed for centuries. Bibliographic records for these documents do include US classifications, so classification search might still retrieve these records.
Some representative patent drawing thumbnail images are present for this collection (to read more about thumbnail drawing images, see the Viewing Patent Drawings section of this article).
The US collection is the only collection for which Delphion maintains citation data.
Although it is not uncommon for full text search providers to lack this valuable collection, searchable pre-1970s OCR full-text records for US patents are available through several other subscription services, including Questel QPAT, MicroPatent PatentWeb, Thomson Innovation, or the free search tool Google Patent Search. (Earliest dates of coverage vary across these providers).