(a) The applicant for a patent is required to furnish a drawing of the invention where necessary for the understanding of the subject matter soughtto be patented. Since corrections are the responsibility of the applicant, the original drawing(s) should be retained by the applicant for any necessary future correction.
CFR 37-1.81-2013 history
2013CFR 37-1.81-2013 Patents, trademarks, and copyrights. Part1:Rules of practice in patent cases. Section1.81:Drawings required in patent application.