MPEP 904.01(b)
Equivalents

This is the Ninth Edition of the MPEP, Revision 08.2017, Last Revised in Januay 2018

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904.01(b)    Equivalents [R-08.2012]

All subject matter that is the equivalent of the subject matter as defined in the claim, even though different from the definition in the claim, must be considered unless expressly excluded by the claimed subject matter. See MPEP § 2181 - § 21.4 for a discussion of equivalents when a claim employs means or step plus function terminology.