Patents > Guidance, Tools, and Manuals > Search Templates > Search Templates By Class > Search Templates Class 435 > Subclass 91.000 - 99.000
Search Templates Class 435/91.000 - 99.000    

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Classification 435/91.000 - 99.000 >> view this class definition


As general guidance, a complete search of U. S. patents in this art area will include the following:

  1. A classified search of the original classification class and subclass for the subject matter and the other highly relevant art areas in the US patent documents
  2. A text search of the US patent documents; patents, PG PUB, and OCR databases:
    • Broad text search for the general inventive concept(s), not limited by classification
    • Narrow text search for the specific claimed invention
    • Boolean text search employing the relevant inventive terms

The resources listed below are internal USPTO search tools. However, the information that they cover is available either commercially, on the USPTO web site, or in the Public Search Facility on the USPTO Headquarters campus and the Patent and Trademark Depository Libraries.

EAST Coverage: 2001 - present, Full Text: 2001 - present
WEST Coverage: 2001 - present, Full Text: 2001 - present
U.S. published applications.

Used for full text, inventor, and classification searching.


Searched separately from the U.S. Patent Search. These databases consist of abstract documents. Text searching abstracts requires the use of different search logic e.g. the use of broad Boolean and/or operators instead of narrow proximity operators.

Derwent World Patents Index and the contents of the EPO Abstracts and JPO Abstracts are available commercially.


The resources listed are those that USPTO staff have found consistently yield the most relevant search results. Commercial databases available through a single vendor can generally be searched simultaneously, although it is preferable to search full text and bibliographic databases in separate groupings. In addition to the use of subscription databases and public Internet sites, it is recommended that books, manuals, standards and specifications be considered in the search for prior art.


An Internet search should be considered when a search of the resources listed above fails to locate relevant prior art. A preliminary Internet search may be performed to obtain an overview of the technology, and to identify additional search terms and related product information.

Public Comments on the Search Templates

Public comments on the search templates are invited. Comments should address the points enumerated in the Criteria for Evaluating Recommended Search Resources. Comments can be submitted via the Search Template Project e-mail link on each template page or by mail addressed to:

Mail Stop Patents Search Template Comments
Commissioner for Patents
P.O. Box 1450
Alexandria, VA 22313-1450
Electronic submission is preferred. The Office will respond to comments in writing.

Submit general comments and suggestions to Search Template Project
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