PatentFig AI

Patent drawing software creates the figures filed with a patent application: black-and-white line drawings, flowcharts, and block diagrams that follow office rules such as USPTO 37 CFR 1.84. PatentFig AI generates these figures from a text description, photo, sketch, or CAD view, lets you revise them in chat, checks them against office rules, and exports filing-ready sheets.

Yes. PatentFig AI is free to start with no credit card: you get 30 credits on the day you sign up and 10 free credits every day after that (daily credits expire the same day), enough to generate figures for your own invention. General-purpose drawing tools are also free, but you format margins, line weights, and reference numerals yourself.

Patent illustrators and drawing services typically charge about $25–$300 per figure, plus fees for revision rounds. PatentFig AI paid plans start at $50 per month for 500 credits — roughly $1 per generated figure — and include editing, compliance checks, and filing-sheet export. See the pricing page for current plans.

PatentFig AI generates three categories: product structure drawings (line art and 3D renderings with multiple view angles), process/logic diagrams (method flowcharts and system block diagrams), and design patent figure sets (multi-view renderings). All outputs comply with major patent office requirements.

We support multi-office patent drawing workflows for CNIPA (China), USPTO (US), EPO (Europe), JPO (Japan), KIPO (Korea), and PCT/WIPO-oriented filing preparation. Each office or filing path has different expectations around line weight, margins, numbering, and presentation that PatentFig AI helps standardize.

Each generation consumes credits based on task complexity. Simple line art typically uses fewer credits than multi-view rendering workflows. Free accounts get 30 credits on sign-up day and 10 free credits every day after that (daily credits expire the same day), while paid plans include larger monthly credit quotas.

Yes. Describe a change in chat, such as “add a cross-section line here” or “change the perspective angle”, and PatentFig AI applies it to the figure. Reference numerals have their own editor: move them, add new ones or renumber them directly on the drawing. Every edit is saved as a new version, so you can always go back.

Yes. Open Edit numerals on any figure: the numerals already on the drawing become editable labels. Drag a numeral to move it, drag the tip of its leader to point at another part, press on a part and drag to add a new numeral, or change and delete numbers in the list. Duplicate numbers and crossing leaders are flagged before you save, and the result is saved as a new version. Numeral editing is included with any paid plan or credit pack.

Yes. Filing sheet export lays out the whole figure set for USPTO, EPO, PCT, CNIPA, JPO or KIPO: A4 pages with that office’s margins, figure labels such as FIG. 1 or 图1, and sheet numbers, in black and white at 300 DPI as PDF or TIFF. For JPO and KIPO, which take one image per figure, it exports images instead. Each sheet is checked before export and the package includes a compliance report. Filing sheet export is included with any paid plan or credit pack.

Yes. All uploaded images and descriptions are encrypted in transit and at rest. We do not use your data to train AI models. Files can be permanently deleted from your account at any time.