How should conventional features be illustrated in patent drawings?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

According to MPEP 608.02(d), conventional features in patent drawings should be illustrated as follows:

• Use graphical drawing symbols
• Use labeled representations (e.g., a labeled rectangular box)

The MPEP states: However, conventional features disclosed in the description and claims, where their detailed illustration is not essential for a proper understanding of the invention, should be illustrated in the drawing in the form of a graphical drawing symbol or a labeled representation (e.g., a labeled rectangular box).

This approach simplifies the drawings while still providing necessary information about conventional elements. It allows the focus to remain on the novel aspects of the invention while acknowledging the presence of standard components.