Patent drawing fundamentals: Must patent drawings be mechanically correct and serve as complete visual illustrations of every feature that is claimed in the invention, so the examiner and public can understand the subject matter precisely?

Introduction / Context:
Patent drawings are not artistic sketches; they are technical communication tools supporting the legal claims of an invention. Their purpose is to clearly depict the invention so that a patent examiner and later the public can understand the claimed features without ambiguity.

Given Data / Assumptions:

• The statement addresses general patent drawing practice for filing.
• “Mechanically correct” means consistent geometry, accurate depiction, and internally coherent views.
• Each claimed feature should be illustrated at least once with clarity sufficient for understanding.

Concept / Approach:
To protect claims, drawings must depict all essential features with correct relationships and proportions. Omitting a claimed feature from the drawings can invite rejections, misunderstandings, or narrow claim interpretation. While stylistic conventions vary by jurisdiction, the core expectation is technical clarity and completeness.

Step-by-Step Solution:

Verification / Alternative check:
Review typical office actions: many drawing objections arise when features are incomplete or inconsistent. Thorough, precise drawings reduce prosecution friction and misunderstanding.

Why Other Options Are Wrong:

Common Pitfalls:
Inconsistent labeling, missing views of critical mechanisms, and perspective drawings that hide functional geometry.

Final Answer:
Correct