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indexSearching the Assignee FieldSearches the Patent Assignee Name(s) and Code(s) field within a patent record.
When searching this field, note that a four-character assignee code may also be a word in an assignee name. If you want to restrict your search to just assignee names or assignee codes, select the appropriate option above the search entry field. To identify a code belonging to a specific company, click the search aid link to look for specific terms to add to your search. indexAbout Patent Assignee Names and CodesTo standardize company names, Derwent assigns a unique 4-letter code to approximately 21,000 companies worldwide. These companies are regarded as standard companies, and regularly file a large number of patent applications. Use of these codes retrieves subsidiaries and related holdings of the company. Other companies and individual patent assignees are given a non-standard 4-letter code, which is not unique. Patent codes appear as:
Note that patentee names were limited to a maximum of 4 names, each having up to 24 characters up until 1992, when the limit was raised to 40 characters with no restriction on the total number of names. The name may be shortened or abbreviated to fit the restriction. Example: INT for International |
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