Find Prior Art Using International Classification Codes?

TOPIC: In this example, you will identify International Classification codes for a specific category of patents. Patents are legal documents. Codes, which are added to the patents by Patent Examiners and Information Providers, can help researchers with their searches. The U.S. Patent Office, the database producer of the CLAIMS databases and WIPO (World International Patent Organization) have each developed a set of codes.

To find codes, search on synonyms and RANK IC, the International Class code. Then save the top few codes to search. The RANK command extracts terms from the specified field(s) in a set of records and lists them in ranked order. The most highly posted term will appear first.

Use Derwent World Patents Index® (File 351) to obtain descriptive titles of the technology.

COMMAND SUMMARY

BEGIN 351
SELECT SURG? ? OR SURGING? OR OVERCURRENT? OR OVERVOLT? OR OVER()(CURRENT? OR VOLT?)
SELECT PROTECT? OR SUPPRES? OR ARREST?
SELECT S1 (1N) S2
SELECT TELEPHON? OR TELECOM?
SELECT S3 (50N) S4
Click S5 > Tasks > Rank > International Class Code
SELECT S5 or S6
TYPE S7/TI/1-2

HOW TO...

1. Conduct a subject search to retrieve patents in your area of technology using Derwent World Patents Index (File 351).   2. Use keywords to obtain all synonyms. Note limited truncation ? ? to take the place of one letter.
3. Use proximity connectors (1N) and (50N) to combine sets.     4. Click S5 > Tasks > Rank to obtain a list of International Class codes.
5. Check International Class code (IC) from the Rank Fields.
6. Check the class code with the most items and click SEARCH.     A set with this class code will be automatically created.
7. Use the OR connector to combine the class code set with the keyword set to retrieve all records on this topic. 8. TYPE S7 using the user-defined format TI to see the Derwent descriptive titles of the patents.

RELATED HOW DO I...? SOLUTIONS

• Find legal status for a patent?
• Find a patent using a U.S. application number?
• Find a Japanese patent?
• Find a complete patent family using Derwent World Patents Index (File 351)?
• Order a patent from the Thomson Patent Store?

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Stock #: 53135; Last modified: 14 Sep 2011

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