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The authoritative guide to the preparation of patent drawings for filing in the United States Patent and Trademark Office. This is USPTO's own guide, which went out of print and is reprinted here. Two small sections by an experienced practitioner (Carl Oppedahl of Oppedahl Patent Law Firm LLC) have been added -- a section on best practices for creating drawings for electronic filing, with examples of ways that USPTO's systems can degrade perfectly good drawings and tips for avoiding such problems, and a section on best practices for creating drawings for design patent applications. PROCESSING OF DRAWINGS Review of Drawings by Office of Initial Patent Examination Review by USPTO Draftsperson On Examiner's First (Non-Allowance) Action On Examiner's Subsequent Actions On Allowance After Allowance SELECTED U.S. LAWS AND RULES OF PRACTICE RELATING TO PATENT DRAWINGS 35 USC 113 Drawings 37 CFR 1.58 Chemical and mathematical formulae and tables 37 CFR 1.74 Reference to drawings 37 CFR 1.81 Drawings required in patent application 37 CFR 1.83 Content of drawing 37 CFR 1.84 Standards for drawings 37 CFR 1.85 Corrections to drawings 37 CFR 1.96 Submission of computer program listings 37 CFR 1.121 Manner of making amendments in applications 37 CFR 1.151 Rules applicable [Designs] 37 CFR 1.152 Design drawings 37 CFR 1.161 Rules applicable [Plants] 37 CFR 1.165 Plant drawings 37 CFR 1.171 Application for reissue 37 CFR 1.173 Reissue specification, drawings, and amendments 37 CFR 1.211 Publication of applications 37 CFR 1.215 Patent application publication 37 CFR 1.437 The drawings [International Applications] 37 CFR 1.530 Statement by patent owner in "ex parte" reexamination; amendment by patent owner in "ex parte" or "inter partes" reexamination; inventorship change in "ex parte" or "inter partes" reexamination Article 7 of Patent Cooperation Treaty and Selected PCT Rules Pertaining to Drawings Symbols Drawing Examples Black ink Black ink [computer screen image] Identification of drawings Graphic forms in drawings [chemical formulae] Graphic forms in drawings [waveforms] Graphic forms in drawings [DNA structures] Views Exploded views Partial views Sectional views Alternate position Modified forms Arrangement of views Front page view Character of lines, numbers, and letters Shading [spaced lines] Shading [stippling] Symbols Legends Numbers, letters, and reference characters Lead lines Arrows Copyright or Mask Work Notice Numbering of sheets of drawings "