What are annotated sheets in patent drawings?

Annotated sheets in patent drawings are marked-up copies of drawings that show proposed changes to the original drawings. According to MPEP 608.02(v), “When changes are to be made in the drawing itself, other than mere changes in reference characters, designations of figures, or inking over lines pale and rough, a marked-up copy of the drawing should be filed with a replacement drawing.” These annotated sheets are used to clearly indicate the modifications being made to the original drawings.

To learn more:

• patent drawings
• annotated sheets
• drawing changes
• USPTO procedures