How should figures be labeled in patent drawings?

According to MPEP 507, figures in patent drawings should be labeled as follows:

Each figure must be labeled ‘Fig.’ with a consecutive Arabic numeral (1, 2, etc.) or an Arabic numeral and capital letter in the English alphabet (A, B, etc.). See 37 CFR 1.84(u)(1);

This labeling convention ensures clarity and consistency in referencing figures throughout the patent application and publication. Improper labeling may result in an objection from OPAP and require correction.

Topics: MPEP 500 - Receipt and Handling of Mail and Papers, MPEP 507 - Drawing Review in the Office of Patent Application Processing, Patent Law, Patent Procedure
Tags: drawing requirements, figure labeling, patent drawings