Patent Drawing Guide
Patent Drawing Guide
Free Tools & Step-by-Step Instructions
You don't need professional drawings for provisional patents! Use free tools like draw.io to create USPTO-acceptable diagrams in 30-60 minutes. Professional upgrade only needed when converting to utility patent (12 months later).
Informal OK
Hand-drawn or digital - both acceptable
30-60 Minutes
Per patent (7 figures)
Free Tools
draw.io, PowerPoint, Google Slides
draw.io
Free, web-based diagramming tool
File provisional with free tool drawings
Hire professional illustrator for utility conversion
$50-150/sheet (~$350-1,050 per patent)
System Architecture
5 stacked layers showing frontend → backend → database → APIs
Data Flow
Left-to-right process flow with parallel simulations
Algorithm Flowchart
Branching decision tree for entity-specific calculations
Breakeven Calculator
Loop algorithm showing monthly iteration
UI Screenshots
Annotated screenshots or mockups of user interface
Tax Decision Tree
Hierarchical tree showing tax calculation branches
Projection Graph
Line chart showing 5-year cumulative tax comparison
Complete Step-by-Step Guide
Detailed instructions for each figure, export settings, USPTO requirements, and filing strategy
Includes templates, tips, and examples for all 7 figures
✓ Draw.io flowcharts and diagrams
✓ PowerPoint/Google Slides diagrams
✓ Annotated screenshots from your app
✓ Hand-drawn sketches (if clear)
✓ Black and white or color
✓ Simple, clear, legible
✗ Professional illustrator
✗ CAD software or technical drawing tools
✗ Artistic quality or beauty
✗ Perspective or shading
✗ Formal compliance with 37 CFR 1.84 (utility only)
✗ Spending $50-150 per sheet right now