Inklaim Features Sheets from 3D

Sheets from 3D models

Patent drawings from your 3D CAD model, without redrawing

Upload the client's STEP or IGES file and choose the views: Inklaim derives orthographic and axonometric views, sections A-A with the section line, exploded views, hidden lines and detail views, and lays them out on the sheet at the same scale, with the reference numerals already used in the text of the application.

STEPIGESBREPAssemblies, inches tooPDF, SVG and DXF export

In brief

Patent drawing sheets start from the model your client already has

Inklaim is web software from an Italian start-up founded in Turin that prepares draft patent drawings, checked against EPO, UIBM, USPTO, PCT, CNIPA and KIPO rules, from 3D CAD models (STEP/IGES), DXF or vector PDF files, photos of an object, sketches and claims.

The client's engineering department usually has the 3D model already: you derive the views for filing from that file instead of redrawing them.

How do you get from a STEP file to patent drawings? Upload the STEP or IGES file, choose the views, the level of detail and the section planes, and Inklaim lays out the figures on the sheet at the same scale. The lines come from the model geometry, not from AI; the draftsperson refines the draft and the patent attorney approves it.

Inklaim editor with a patent drawing sheet: four views of a valve from the STEP model, at the same scale, with reference numerals
Sheet FIG. 3A–3D derived from a STEP file: four views of the same valve, at the same scale, with the matter's reference numerals.

The workflow

From STEP file to patent drawings in five steps

You work in the browser (Chrome or Edge), with nothing to install. Every step has a preview.

  1. Upload the modelSTEP, IGES or BREP, including assemblies and models in inches.
  2. Choose the viewsOrthographic, axonometric, custom view, exploded view, hidden lines.
  3. SimplifyFull, Medium or Essential level: holes, fillets, screws and washers removed.
  4. Sections and detailsChoose the plane on a preview; detail views from 2× to 5×.
  5. Lay out and exportViews at the same scale; PDF, SVG or DXF for the chosen office.

Tested on real files from SolidWorks, Inventor and Siemens NX. The model is processed in a separate process, with time and memory limits.

The views

Which views can you derive from the 3D model?

They all come from the same geometry, so they are consistent with each other.

Orthographic views

Front, rear, top, bottom and side views, in first-angle (European) projection. Sharp edges and outlines only, without tangent edge lines.

Axonometric and custom views

The axonometric view for the general figure, or a view with the rotation and tilt you choose.

Exploded view

The parts of the assembly pulled apart, each with its own reference numeral, on a dedicated sheet.

Sections A-A, B-B

The section line with its letters appears on the reference view; the section is already hatched.

Detail views

A detail enlarged from 2× to 5×, with the circle and letter on the figure it comes from.

Hidden lines and parts

Dashed hidden lines, and parts hidden in some views only, for example the housing.

Sections

Section A-A: choose the plane, the line appears by itself

Move the section plane on a preview of the model and see the result straight away. Inklaim places the line A-A on the reference view and hatches the cut surfaces. You can add further sections, B-B and so on.

For the EPO, hatching must not impede the reading of the reference signs (Art. 1(2)(b) of the Decision of the President of the EPO dated 7 July 2025, OJ EPO 2025, A49). Under the Guidelines for Examination, A-IX, 7.3.1, the ends of the section line may also carry a Roman numeral matching the number of the figure showing the section.

For the USPTO, hatching should preferably be at 45° (37 CFR 1.84(h)). The line stays editable in the editor.

3D CAD wizard: choosing the patent drawing views from the STEP file and the plane of section A-A with a preview
3D model wizard: choosing the views and the plane of section A-A, with a preview.

Layout

Several views on one sheet, at the same scale

The figures of a sheet are generated together: FIG. 1A, 1B, 1C, from the same model, at the same scale, in first-angle (European) projection.

The EPO asks for several figures per sheet without wasting space, and for every detail to remain distinguishable after reduction to two thirds (Art. 1(2)(h) and 1(2)(c), OJ EPO 2025, A49).

  • Part names come from the model assembly.
  • Reference numerals are those already used in the application text or in the matter's list of reference numerals.
  • Figures and sheets follow the automatic figure numbering.
  • The sheet stays editable in the editor or, as a layered DXF, in AutoCAD.

To remove details the application does not need, use patent figure simplification →

Exploded view of a valve for a patent drawing, with reference numerals
Exploded view on a dedicated sheet.
Patent drawing sheet 4/7: FIG. 4A, hatched section A-A of the valve with detail circle B, and FIG. 4B, enlarged detail B
FIG. 4A and 4B: hatched section A-A and detail B.
Exported patent drawing sheet with four views of a valve, FIG. 3A, 3B, 3C and 3D
FIG. 3A–3D: four views at the same scale.

Export

Export for the office: sheet size, margins and labels follow its rules

Choose the office (EPO, UIBM, USPTO or PCT) and the language of the texts. There is only one drawing; the reference numerals do not change.

The output is a PDF for filing, an SVG, a layered DXF or a ZIP of the matter. Before that, the compliance check verifies the usable area, character height, line thickness, labels, sheet numbers and text matter that is not indispensable.

An EPO sheet, with 1.5 cm on the right and 1 cm at the bottom, does not strictly meet the 2.5 cm on every side required by Art. 22 of Italian Ministerial Decree 33/2010 (UIBM). That is why the layout is chosen at export.

These are drafts checked against the formal rules: the final check stays with the patent attorney.

Layout rules of the four offices

RequirementEPOPCTUSPTOUIBM
Margins (top, left, right, bottom)2.5 / 2.5 / 1.5 / 1 cm2.5 / 2.5 / 1.5 / 1 cm2.5 / 2.5 / 1.5 / 1.0 cmat least 2.5 cm on all sides
Height of numbers and lettersat least 0.32 cmat least 0.32 cmat least 0.32 cm (1/8")not specified for drawings
Sheet numberingArabic numerals, centered at the top"1/3", "2/3"…"1/3", centered at the topconsecutive
Figure labelFIG 1, FIG 1AArabic numeralsFIG. 1consecutive numbering

Sources: OJ EPO 2025, A49, Rule 11 PCT, PCT Administrative Instructions, Section 207, 37 CFR 1.84, Art. 22 D.M. 33/2010. Rule 46 EPC was deleted with effect from 1 February 2023. Guides: EPO patent drawing requirements, Italian patent drawings (UIBM).

Updated October 2026

Exporting the patent drawing sheet for filing: choice of patent office profile, file format and text language
Export: office, format and text language.

The comparison

Redraw the views, or derive them from the model?

Today, by hand

  • You redraw views that already exist in the model.
  • You transfer scale and alignment by hand.
  • You draw the section and hatching by hand.
  • You delete holes, fillets and fasteners one by one.
  • You redo the layout for each office.

With Inklaim

  • The views come from the file geometry.
  • Same scale by construction.
  • Section line and hatching already in place.
  • The level of detail removes small features.
  • Sheet size, margins and labels follow the office.

Then the patent drawing consistency check verifies that the same numeral indicates the same part in every figure and compares dimensions between views, with a 3% tolerance.

The video

Watch the workflow, from STEP file to sheet

The video runs 5 minutes 19 seconds; sheets from the 3D model are the second of the five jobs shown.

Read the video transcript

This is Inklaim, the drawing office for European patent firms. It prepares the sheets for filing from what the firm already has: the client’s 3D model, the technical drawing, the claims.

Today, figures are the most hand-crafted part of a matter: hours spent redrawing views that already exist, office rules, similar but not identical, and one wrong numeral is enough for an objection.

Draftspersons told us the five jobs they most want to lighten. Let’s see them in the app.

One: simplifying the figures.

From the client’s 3D model, you choose the level of detail. With “Essential”, small holes, chamfers and fillets disappear, and so do threads. And screws and washers are removed on their own. Here is the same view: full on the left, essential on the right.

The same goes for the workshop drawing, as DXF or vector PDF. Dimensions, lettering, title block, centre lines and hatching disappear by themselves. Before confirming, you see in colour what will be removed, and how each view will look.

And what if the client’s drawing is full of identical objects, like these three hundred holes? Pick one, and “Select identical” finds every copy, even turned or mirrored. Check the selection, and delete them in one go. With AI, when it is on, just type it: “all the brackets along the rail”.

Two: sheets from the 3D model.

Upload the STEP file and choose the views, axonometric and exploded views included. For the section, choose the plane on a preview: the section line A-A appears by itself. And several views on one sheet, at the same scale; the exploded view gets its own sheet.

Here is a sheet generated this way. Already laid out, with four views at the same scale. The parts carry the numerals already used in the text of the application. And the sheet stays editable, in AutoCAD too.

And what if the client only has the object? Two or three photos will do. Inklaim lifts the object off the background and suggests the lines: one click keeps the real ones. With AI, when it is on, it tells real edges from reflections itself and names the parts. One drawing per photo, with the same numerals. And for turned parts, the photos give a 3D model, with the match measured on every photo.

Three: consistency between the views.

The Checks tab compares every figure in the matter, and the text. It finds the same numeral used for different parts, or the same part with different numerals. It flags figures that are cited but do not exist, or are out of order. It compares sizes across the views: here, one is ten per cent narrower. And from each warning, you go straight to what needs fixing.

Four: automatic numbering.

Move one figure, and all the others are renumbered. Before saving, Inklaim shows every reference in the text that will change. And you choose which ones to update. If you cancel, everything stays as it was.

“Renumber all” reassigns the numerals in the order in which the parts appear, following the firm’s own scheme too, for example even numerals only. Figures, description and claims change together, and it can all be undone straight away.

Five: the texts in the drawings.

All the wording in the figures is in a single table, with the translations alongside. Words are found and replaced across all the figures at once, and before confirming, you see every change, figure by figure. When AI is switched on, it translates them following the glossary and the claims.

And from the method claims, the flowchart is ready in a few seconds. With the steps already numbered, S100, S102, and so on. Without AI, straight from the text; then you edit it like any other drawing.

When the sheet is ready, you export it for filing. Choose the office, and sheet size, margins and labels follow its rules. China and Korea too, with the images for online filing. Then the language of the texts: there is only one drawing, and the numerals never change.

Matters, files and backups are stored in the European Union, and AI works in Europe. AI is optional, and whenever it is used, it is always disclosed. And no line is invented: each comes from the model, the drawing, the sketch or the photos.

We are proposing a four-week trial, with a group of three to six draftspersons and patent attorneys, on matters already filed and published, redone with Inklaim. Together, we measure the time saved and the quality of the sheets.

Let’s try it on real patents. If you are interested, let’s choose the three matters together and get started.

FAQ

Patent drawings from 3D CAD: common questions

Which 3D CAD formats does Inklaim accept?

STEP, IGES and BREP, including assemblies and models in inches. Native SolidWorks, Inventor or Creo files must first be exported to STEP or IGES.

Does artificial intelligence draw the views?

No. CAD views are computed deterministically from the model geometry: no line is invented. AI is optional, is switched on per firm and works on texts, such as translations, and proposes numerals and visual checks for you to confirm.

Are the sheets ready to file?

They are drafts, already laid out and checked against the formal rules of the chosen office. The draftsperson refines them, the patent attorney approves them and the filing stays with the firm. Acceptance by the office is not guaranteed.

How much does it cost to derive sheets from a 3D model?

You pay for the finished figure, when you export it for filing; re-exports are free for 12 months. The Per matter plan costs €49 per matter (up to 10 figures; VAT not applicable, Italian flat-rate scheme); the free trial lasts 14 days. All plans are on the pricing page.

The pilot

Try sheets from 3D on three published matters

In the 4-week pilot, 3 to 6 people from your firm redo the sheets of 3 already published patents with Inklaim, and together we compare time and quality. We start after a non-disclosure agreement.

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