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Pat Search is a Full Text Search Engine

The data contains searchable indexes for all popular text fields including:
Detailed Descriptive Text,  Complete Claims, Title and Abstract text, all of which can be  searched independently, or all text fields simultaneously.  

US Classes for all patents and applications are updated every 60 days shortly after the USPTO releases the reclassification data.

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DPSFiles.com - The PatSearch System

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Full Text Indexed and available from Jan 1st, 1976 through:

December 28th, 2014
Image data and Class searches complete from July 1790 through:
December 28th, 2014
Class Indexes are updated/synchronized from 1790 up to:

November 1st, 2014
NOTE: Periodically you should clean your work area with the
Delete Search History c
ommand on the Search Page. This
command also updates the forms to new versions
if any exist,
and applies new program updates to your work area that can't
be applied when any Search History exists.

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