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[Steven Oppenheimer]

An old (2002) patent bar test that I have indicates that when corrections to drawings are submitted, the changes must be indicated in red.  However, searching 37 CFR and the MPEP (most recent versions), I cannot find any discussion of making annotations in red.  Has that been changed, so that red markings are no longer required (or are even not allowed)?  Or if it is still required, can someone steer me to the relevant sections of 37 CFR or the MPEP?

Thanks in advance for all replies.

Steve O.