Inklaim Features Simplification
Simplifying figures
Inklaim simplifies patent figures in two ways. On the 3D model you choose the level of detail, and small holes, chamfers, fillets and threads, screws and washers disappear. From a DXF or vector PDF it removes dimensions, texts, title block, frame, center lines and hatching. Before confirming, you see in color what will be removed.
In brief
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 workshop drawing exists to manufacture the part: dimensions, title block, every hole and every fillet. The patent figure exists to explain the invention, and it must stay legible when reduced. Much of the draftsperson's work is taking things out.
How do you simplify a technical drawing for a patent? From the 3D model, choose the Full, Medium or Essential level of detail; from a DXF or vector PDF, the import removes dimensions, texts, title block, frame, center lines and hatching. Inklaim adds no lines, it only removes them, and shows you a preview before you confirm.


The rules
Because office rules require figures that stay legible after reduction and carry no superfluous text. These are the rules that matter most when you start from a technical drawing.
| Rule | Source | What you remove from the figure |
|---|---|---|
| Every detail distinguishable after linear reduction to 2/3 | EPO, Art. 1(2)(c) OJ EPO 2025, A49; Rule 11.13 PCT; USPTO, 37 CFR 1.84(k) | Small fillets, chamfers and threads, which turn into blots when reduced |
| No text, except a few indispensable keywords | EPO, Art. 1(2)(j) OJ EPO 2025, A49 and Guidelines A-IX, 8; Rule 11.11 PCT | Dimensions, notes, tolerances and title block text |
| Usable surface without frames | EPO, Art. 1(1) OJ EPO 2025, A49; Rule 11.6(c) PCT | Frame and title block of the workshop sheet |
| Views without projection lines or center lines | USPTO, 37 CFR 1.84(h) | Axes and center lines |
| Hatching must not obscure the reference numerals | EPO, Art. 1(2)(b) OJ EPO 2025, A49 | Workshop hatching, to be redone only where needed |
| Sheets without legends, except those necessary and any scale | UIBM, Chamber of Commerce practice (Genoa CCIAA guide) | Unnecessary text and indications |
Sources: Decision of the President of the EPO dated 7 July 2025, OJ EPO 2025, A49, Guidelines for Examination, A-IX, 8, Rule 11 PCT, 37 CFR 1.84, Genoa Chamber of Commerce (CCIAA) guide (secondary source, in Italian). Learn more in the guide to European patent drawing requirements.
Updated October 2026
From the 3D model
When you derive the views from a STEP or IGES file, you choose how much detail to keep. With Essential, small holes, chamfers, fillets and threads disappear, together with small fasteners such as screws and washers. The sizes below which a feature counts as small are adjustable.
The simplified views then go on the sheet at the same scale, as explained on the page about patent drawings from 3D CAD →

From DXF or PDF
Import the technical drawing that the engineering department has already sent you. Inklaim recognizes and removes what does not belong in a patent figure.
Before confirming, you see the removed elements in color, with a count by type, and how each view will look. If something should have stayed, you see it straight away.
It works with DXF and vector PDF files. DWG files are first saved as DXF from the CAD program.
The geometry stays that of the original drawing: Inklaim does not redraw or correct it. The cleaned figures enter the matter like any other, with reference numerals and checks.



Repeated objects
Client drawings often arrive with hundreds of objects the patent does not need: holes, washers, brackets, posts, drawn as loose lines, with no layers or blocks. Pick one example and Inklaim finds all the copies.


From the example, every copy in the figure, even rotated or mirrored, at the same size. Then Delete removes them.
“Select similar” for near-identical shapes; “Select by filter” by type, size on the sheet and in the drawing, and area.
Type what to select: the AI points at an example or a filter, and the editor finds the copies. Nothing is deleted without you.
In the editor
Whatever automatic simplification cannot decide on its own, you refine in the figure editor, in millimeters.


Erase or cut a segment of a traced path without touching the rest of the figure.
Divide a path into pieces to handle separately, or rejoin broken lines.
A slider sets how much to simplify the traced paths. The version history, with preview and restore, keeps every step.
The comparison
The cleaned figures then go through the consistency check, which compares reference numerals and dimensions across the views of the whole matter.
The video
The video runs 5 minutes 19 seconds; simplifying figures, from 3D and from DXF, is the first of the five jobs shown.
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
You remove only what you decide. The level-of-detail sizes are adjustable, each part can be shown or hidden, and the preview shows in color what disappears. With the version history you can go back to an earlier version.
Not directly: save the DWG as DXF from your CAD program and then import it. In the same way, native SolidWorks, Inventor or Creo files are first exported to STEP or IGES.
No. Simplification and 2D import are deterministic: Inklaim removes elements from the model or the drawing and never invents new ones. AI is optional: it works on texts and, with “Select with AI”, only says what to select.
You add the few permitted keywords in the editor. Inklaim flags text matter that is not indispensable, citing each office's rule, and turns it into a reference numeral with one click: see the page on texts in patent drawings.
The pilot
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.