Can original drawings be physically altered to correct errors in a patent application?

The MPEP is clear on this matter: original drawings should not be physically altered to correct errors. Section 608.02(p) states:

“Original drawings should not be altered or obliterated by applicant or draftsperson.“

Instead of altering original drawings, applicants should:

• Submit replacement sheets with the necessary corrections
• Provide a marked-up copy showing the changes
• Include detailed explanations of the changes in the amendment or remarks

This approach preserves the integrity of the original submission and provides a clear record of changes for the patent examiner and file history.

To learn more:

• original drawings
• drawing alterations
• replacement sheets
• patent application