Patent Drawing Description Example: Brief Views and Detailed Text

The brief description of drawings tells the reader what each figure shows. The detailed description uses those figures to explain the parts, relationships and operation. A short list of views cannot replace that technical explanation, and a long description cannot repair a reference to a figure that does not exist.

USPTO MPEP § 608.01(f), including 37 CFR § 1.74, calls for a brief description of the views when drawings are present and references to figures and parts in the detailed description. This tutorial focuses on the words and their correspondence to the views. Use the separate drawing requirements checklist for presentation requirements and the US drafting guide for the complete document.

A concrete two-view example

The diagram and text below are fictional teaching material created for this guide. They are not customer drawings, samples from a CNIPA.AI drawing task or a submission-ready drawing set. The open-cover angle and component proportions are schematic; no dimensions or performance results are disclosed.

The example has three stated components: a base 10, a cover 20 and a hinge 30 connecting the cover to the left edge of the base. The cover overlies the base when closed and pivots about the hinge to open. No latch, seal, spring or opening stop is included in the supplied facts.

The figure inventory is small enough to reconcile directly:

“FIG. 2” identifies a view. “20” identifies the cover in either view. The numbers have different jobs, as explained in the reference-number register guide.

Write the brief description of drawings

For the illustrated teaching set, a brief view list could read:

FIG. 1 is a schematic side view of a hinged cover assembly with the cover in a closed position.

FIG. 2 is a schematic side view of the hinged cover assembly of FIG. 1 with the cover in an open position.

Each entry identifies a figure and its particular view or state. The second entry relates the views without turning the list into an operation narrative.

Avoid claiming that FIG. 2 is a cross-section or exploded view: it shows neither a cut through the assembly nor separated components. Similarly, “FIG. 2 proves improved access” would add a performance conclusion that the schematic cannot establish.

Use the same views in the detailed description

The corresponding descriptive passage can do more work:

As shown in FIG. 1, a hinged cover assembly includes a base 10 and a cover 20 connected to the base 10 by a hinge 30 at the left edge shown in the view. In the closed position, the cover 20 overlies the base 10. FIG. 2 shows the cover 20 pivoted about the hinge 30 into an open position relative to the base 10.

This passage names the components, explains their connection and relates the two states. It remains a limited teaching excerpt: it does not explain an undisclosed hinge construction, fastening arrangement or opening limit. A complete project may need those details, depending on the actual invention.

The description should not state that a spring opens the cover or that a latch holds it shut, because neither feature was supplied or drawn. A familiar-looking assembly is not permission to fill in its missing construction.

Map the prose to something a reviewer can inspect

For a real draft, record the actual image revision and paragraph containing each statement. A figure plan is provisional; update the descriptions after reviewing the delivered drawings.

Correct a mismatched view list

Suppose a draft says “FIG. 3 is an exploded view of the latch mechanism,” but the supplied set contains only FIGS. 1 and 2 above.

There are two separate issues: FIG. 3 is missing, and a latch mechanism is absent from the disclosed example. Renaming the sentence “FIG. 2” would solve neither. Determine whether the source genuinely includes an additional mechanism and whether another figure is intended. Correct an erroneous sentence, or obtain and review the needed material; do not invent a figure to make the list complete.

The USPTO's MPEP § 608.01(f) describes checking whether figures referenced in the specification are present. Handle an actual filed application's missing-figure situation with the responsible practitioner; this drafting exercise does not determine the procedural response.

Reconcile the final draft after a drawing changes

When a view is replaced, removed or renumbered, check the view list, every body reference and the component register together. Confirm the view type as well as its number. A detail view substituted for an overall view may require a different explanation even if both are labeled FIG. 2.

Use the patent drawings workspace overview to inspect the drawing workflow and its scope. For a US text draft, start from the US drafting entry, keep the reviewed figures beside the document and follow the US specification review guide. Neither a matching caption nor a successful export proves the technical content is correct.

Is the brief description the same as the detailed description?

No. The brief list identifies the views. The detailed passage explains the illustrated relationships and operation, using the same figure and component references.

Must a brief description list every component number?

The short view list in this example does not need to repeat the component register. Keep the view recognizable, and use appropriate component references when explaining the invention in the detailed text.

Can a caption supply a feature missing from the figure?

A caption is not a substitute for the required technical disclosure or an accurate drawing. Inspect the source, the intended role of the view and the complete description before deciding what needs correction.