Are these real patent drawings?

No. Every example is a fictional invention created to illustrate patent drawing conventions. They are safe to study and adapt, and they do not expose anyone’s confidential invention.

What makes a good patent drawing?

Filing-ready patent drawings use solid black lines on a white background, uniform line weights, consistent reference numerals connected by leader lines, clearly separated views, and section hatching where needed. They avoid photographs, color, gray shading, and decorative effects unless an office permits them.

How do I create a drawing like these?

Open any example to pre-fill the generator with its prompt, then adapt the description to your own invention. You can also describe your invention from scratch or upload a sketch or photo.

What do the before/after pairs show?

The source image is what a typical user starts from — a product photo, a hand sketch, a whiteboard flow, or a CAD render. The patent figure next to it is the generated black-and-white line drawing with reference numerals. The pairs show how much of the patent-drawing convention the generator applies automatically.

What is the difference between utility and design patent drawings?

Utility patent drawings show how an invention works and use reference numerals for each feature. Design patent drawings show ornamental appearance across a consistent set of views (front, rear, sides, top, bottom, perspective) and generally avoid reference numerals.

Can I use these examples for a real filing?

Use them as references and starting points. Generate and edit a figure for your own invention, validate it against your filing office with the figure checker, and have a patent attorney or agent review it before filing.

Which categories are covered?

Twenty-five examples across eight categories: utility, design (including broken lines), mechanical (including cross-sections), electrical and circuit, software flowcharts and process diagrams, block diagrams (including AI/ML and IoT systems), medical devices, and exploded views.

Patent Drawing Examples

Twenty-five sample patent drawings across eight categories — with before/after pairs showing how a photo, sketch, or CAD view becomes a filing-ready figure. Open any example to start a similar drawing.

Open the generator Drawing requirements

25 sample figures
Before/after pairs
8 categories
Open & adapt any example

The 30-second answer

A filing-ready patent drawing is black line art on white: uniform line weights, numbered views, and reference numerals with leader lines — no color, shading, or photo textures.
The fastest way to get one is to start from the closest example below, pre-fill the generator with its prompt, and adapt it to your invention.
Before filing, validate margins, DPI, line weight, and numerals against your patent office with the figure checker.

Sample patent drawings by category

Each sample is a fictional invention. Cards marked with a source image show the before/after: what went in, and the patent figure that came out.

Utility patent drawings

Utility figures show how an invention works. Every functional part gets a reference numeral with a leader line, and the same part keeps the same numeral across every view.

Design patent drawings

Design figures show ornamental appearance across a consistent view set — front, rear, sides, top, bottom. Claimed shape in solid lines, unclaimed context in broken lines, no reference numerals.

Mechanical patent drawings

Mechanical figures rely on section hatching for cut surfaces, consistent numerals across assembly states, and clean orthographic or perspective projection.

Electrical & circuit drawings

Circuit schematics use standard symbols and labeled nets; wiring diagrams use orthogonal routing. Both keep line weights uniform so the office can reproduce them at reduced scale.

Software flowcharts & process diagrams

Method claims are supported by flowcharts: numbered steps in boxes and decision diamonds, with arrows that make the claimed sequence unambiguous.

Block diagrams

System claims are supported by block diagrams: labeled rectangular modules, numbered 1xx/2xx/3xx by figure, connected by arrows that show signal or data flow.

Medical device drawings

Medical device figures often need multiple states (deployed/collapsed), cross-sections through housings, and exploded views — all with consistent numerals across figures.

Exploded views & cross-sections

Exploded views separate parts along a dashed alignment axis; cross-sections hatch every cut surface. Both must still satisfy line-weight and numeral rules.

How to use these examples

Examples are a faster starting point than a blank prompt.

Pick the closest category

Find the example that most resembles your invention type.

Open to pre-fill the generator

The prompt loads into /generate so you can adapt it to your invention.

Edit and add views

Adjust reference numerals, add views, and remove decorative shading.

Check before filing

Validate against your office with the figure checker, then export.

Patent drawing examples