Report:MicroPatent PatentWeb/Data Coverage/Patent Coverage/Citation Coverage
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Citation Coverage
For the purpose of this article, the term "citation" refers to a patent citation. To get more information on how we use the term citation, please see the citations article.
Forward and backward citations are included, where available, in the bibliographic record of each document in the PatSearch collections. As with the family information, citation data in MicroPatent is obtained through EPO-produced data sources and possibly through data feeds from individual patenting authorities. Forward citation records are constructed by parsing the database.
Before September of 2006, MicroPatent PatentWeb contained citation data only for United States (US), European Patent Office (EP) and Patent Cooperation Treaty (WO/PCT) collections. After the reload, citation coverage expanded to include other sources available from the EPO’s citation records, including German (DE), Japanese (JP), United Kingdom (GB) and French (FR) citations.
MicroPatent PatentWeb citation coverage is as follows:[1]
| Authority | Coverage Begins |
| US | 1971 |
| WO | 1978 |
| EP | 1978 |
| DE (none for DE-T) | 1989 |
| GB | 1978 |
| FR | Partial Coverage |
| JP | Partial Coverage |
Citation coverage within the database is continuing to expand. In a release from May 2007, MicroPatent describes the improvements derived from a recent INPADOC/DOCDB reload:
- “More flexible and consistent citation searching and analysis: patent and non-patent citations are now associated with every publication record, meaning you will be able to search or view all citations related to that application. (Previously, citation data were present only in specific records, such as US grants, EP and WO A1 or A3, but not A2.)
- Two sources will be in place for citation information. Citations received directly from the patenting authorities are enhanced by citation information delivered in the DocDB data, ensuring that post-issue citations are captured as well as those cited during examination. The two sources are compared and de-duplicated.
- Citation data is now available for some French and for some pre-2000 Japanese publications.” [2]
Non-patent citation information is included in the data, but the text of these entries is not searchable along with the rest of the full text record of the document; this text must be searched separately, using the “non-patent citation” field of the search form. (Unlike Delphion, another Thomson Reuters-owned search service, MicroPatent does not provide any hyperlinks to copies of these articles. In contrast, Delphion is able to link many non-patent citations in its database to a major Thomson Reuters-owned non-patent literature source, the ISI Web of Science, and it is also able to provide links to other patent documents that may have cited the source.).
See the Viewing Patent Citations section to read about searching and viewing citations through MicroPatent PatentWeb.
Editor's Note:In contrast with other search systems, users of MicroPatent should be aware that when they are viewing patent citations within the system, they are viewing the forward and backward citations for that particular, individual document. More about this important distinction is included in the Viewing Patent Citations section of this article.
Sources
- ↑ Table content provided in the MicroPatent User Guide. MicroPatent Website, http://www.micropat.com/mp_help_desk/psft_help/psft_help.htm#the_search_screen. Accessed on August 30, 2007.
- ↑ Thomson Scientific Notes on MicroPatent PatentWeb. Thomson Scientific website, http://scientific.thomson.com/media/pdfs/patweb_notes.pdf, Accessed on June 10, 2007.
