Patent applications do not always include line drawings.

More Questions from Working Drawings

• In assembly drawings, views should show how the parts fit together and suggest the function of the unit.
• Detail drawings are also called piece part drawings.
• Patent drawings must be mechanically correct and constitute complete illustrations of every feature of the invention claimed.
• The U.S. Patent Office has strict requirements for patent drawings.
• To simplify drawings, it is permissible to list rather than draw standard parts.

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