Can modifications be shown in broken lines on figures with solid lines?

No, modifications cannot be shown in broken lines on figures that show another form of the invention in solid lines. This is based on the principle established in Ex parte Badger, 1901 C.D. 195, 97 OG 1596 (Comm’r Pat. 1901). The MPEP section 608.02(f) states:

“Modifications may not be shown in broken lines on figures which show in solid lines another form of the invention.”

This rule ensures clarity and prevents confusion in patent drawings by keeping different forms of the invention visually distinct.

To learn more:

• patent drawings
• modifications
• broken lines
• solid lines
• Ex parte Badger