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Drawings of a Patent Application and Brief Description of the Drawings.

The drawings of a patent application describe the invention visually, using a chemical or mechanical structure, charts and graphs, and detailed relationships of features.

The drawings contain references (numeric and alphabetic) that relates the feature described in the specification to a corrresponding feature or portion shown in the drawing/image.

The references given in the drawings should have the correct corresponding references (e.g., number or letter) in the inventive description. The drawings can be made using a scanned image or by using a CAD (computer-aided drawing) software, such as AutoCAD or IntelliCAD (which I use).

When one of the figures is a "prior art" image, then it must be labeled as such. Although such prior art drawings are often given as the first drawing in the set of drawings, they are preferably placed at the end of the drawings (especially in international patent filings) in order to avoid the usual "Figure 1" default front page drawing being the non-inventive drawing.

The brief description of the drawing contains such reference phrases, such as perspective, plan, side elevation, cutaway views, etc.