Examples of queries:
U.S. Patent Classification:
You can select patents using
these field codes:
Application Type (APT) is a number
which can have following values: 1 =
Utility, 2 = Reissue, 4 = Design, 5 =
Defensive Publication, 6 = Plant, 7 =
Statutory Invention Registration.
Assignee Name(AN), Inventor Name(IN), Primary Examiner(EXP) are in
the form LastName-FirtsName-Initial (with dashes). Example:
an/Castro-Mary-N. Attorney or Agent (LREP) name is in "LastName
FirtsName Initial" format (no dashes). Exmaple: lrep/"Castro
In International Classification (ICL), 0 substitutes a space. That
is, in order to query patents of G06F 19/00, you must
There must be no leading zeros in the subclass number.
For example, for subclass 001 of class 705, you must specify
ccl/705/1, not ccl/705/001.
You can find an extensive description of search fields and
formatting at the online US Patent and Trademark Office page
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