Patent Drawing in Aarhus.

A patent drawing Aarhus brief almost never concerns a small object. Aarhus and the surrounding Central Denmark Region file wind turbines, circulator pumps, dairy process lines and the control software that runs them — inventions whose figures have to communicate geometry measured in tens of metres alongside detail measured in millimetres, often on the same sheet. That is a drafting problem before it is a compliance problem, and the two Danish filing routes available to an Aarhus applicant answer the compliance half differently.

Where a patent drawing Aarhus application is actually filed

Denmark’s national office is the Danish Patent and Trademark Office — Patent- og Varemærkestyrelsen, generally shortened to DKPTO. It is a single national authority under the Ministry of Industry, Business and Financial Affairs, and it sits in the Copenhagen area rather than in Jutland. There is no patent counter in Aarhus, in Viborg or anywhere else in the Central Denmark Region, so an Aarhus applicant files centrally and electronically. A patent drawing Aarhus project consequently has no local formalities desk to consult, which is one practical reason sheet defects here tend to be discovered late in the process rather than early.

Denmark has been a contracting state of the European Patent Convention since 1990, so the second route into the country does not involve DKPTO examination at all: a European patent granted by the EPO can be given effect in Denmark. Because Denmark is a London Agreement state, that route is administratively light — a patent granted in English needs its claims translated into Danish, while the description can remain in English. For most Aarhus applicants with international portfolios, this is the route that actually matters.

Unlike several EPC states that have closed their national route to international applications, Denmark remains available for PCT national phase entry, with a time limit of 31 months from the priority date. That gives an Aarhus filer a genuine choice at the 30-month mark rather than a single forced path through the EPO, and the choice determines which drawing standard governs the sheets.

Three routes, three drawing standards — decide before drafting

The single most expensive mistake in Danish drawing work is preparing one figure set and assuming it travels. It does not, because the three routes an Aarhus family can take do not apply the same presentation rules.

• EPO route. The European standard governs, and the authority to cite is the EPO Guidelines for Examination, Part A, Chapter IX. Since 1 October 2025 the EPO accepts electronically filed drawings in colour or greyscale where they are contrast-rich and legible, which is a material change for the layered composite and flow-diagram figures common in wind and process filings.
• PCT international phase. PCT Rule 11.13(a) still requires black lines without colourings. A colour figure the EPO will now accept is therefore not acceptable on the international application itself — so a colour variant prepared for a European filing has to be reduced to a compliant monochrome set for the PCT.
• US co-filing. 37 CFR 1.84 governs, and it is the strictest of the three on mechanical particulars: character height of at least 0.32 cm, specified sheet sizes and margins, and black ink unless a petition for colour is granted.

The workable rule for a patent drawing Aarhus engagement is to default to the strictest requirement at every point of conflict and then relax deliberately for the one route that permits it, delivering variants rather than a single file. Discovering the conflict at national-phase entry, when the deadline is already running, is the expensive version of this conversation.

Denmark’s brugsmodel is a second route with its own figures

Denmark offers something most of the EPC states an Aarhus company files into do not, and it is routinely overlooked: a utility model, the brugsmodel, registered under the Danish Utility Models Act.

Its requirements differ from a patent’s in one decisive respect. A brugsmodel requires novelty and industrial applicability but not inventive step. Registration is quick — a matter of a few months rather than years — and protection runs for up to ten years rather than twenty. For a component-level improvement in a turbine mounting, a pump seal or a packaging mechanism, where the commercial life of the design is shorter than a patent term and the inventive-step argument would be contestable, that trade is often the right one.

Two points bear on the drawings. First, the application is a Danish-language filing; where it is submitted in another language a Danish translation must follow within one month, or the application is treated as withdrawn. Any text matter carried on a sheet is therefore text that has to be translated on a short clock, which is a strong argument for keeping sheet annotation to the indispensable minimum. Second, the drawings and photographs must be of a quality suitable for reproduction, and the creation must be shown clearly enough to enable a person skilled in the art to carry it out — a disclosure test the figures have to satisfy, not merely a print-quality test.

Because a brugsmodel is registered rather than substantively examined for inventive step, nobody at DKPTO will tell you that a view is missing. The figure set is the disclosure, and it is checked properly for the first time when somebody disputes it.

Rule 46 EPC no longer exists — cite the right European authority

Since most Aarhus families reach Denmark through the EPO, the European citation matters more here than the Danish one. If a drawing provider offers you “Rule 46 EPC compliance”, they are quoting a rule that has been deleted.

Rule 46 EPC was deleted with effect from 1 February 2023, together with Rule 49(3) to (12) EPC, as part of the EPO’s digital-transformation package. The presentation requirements moved into a Decision of the President published in the Official Journal, so the Office can adjust them without amending the Implementing Regulations. The working text to rely on is the EPO Guidelines for Examination, Part A, Chapter IX; our guide to EPO Guidelines A-IX sets out what changed.

One Guidelines point bites hard on Danish work specifically. Text matter on drawings is limited to a single word or a few words where absolutely indispensable, and any remaining keywords must be positioned so they can be replaced by a translation without disturbing the line work. A Danish-language label block carried over from an internal engineering drawing fails that test twice — once on quantity, and once because replacing it with English will force the figure to be redrawn.

What Aarhus industry demands from a figure set

The Central Denmark Region’s filing profile is unusually concentrated, and it shapes what a competent figure set looks like here.

• Wind energy. Vestas Wind Systems is headquartered in Aarhus, with one of the largest dedicated wind-technology patent portfolios in the world spanning blade design, nacelle and turbine hardware, offshore foundation systems and control software. Siemens Gamesa’s onshore business operates from Brande in the same region. Danish companies obtained 551 green patents at the EPO in 2021, and Vestas, Siemens Gamesa and LM Wind Power together account for more than half of all Danish patent applications in green industries. Turbine filings are the hardest drawing problem in the region: a blade is tens of metres long and the invention is frequently a detail in the root joint or the trailing edge, which means a general view plus enlarged partial views plus sections, with the scale relationship between them made explicit.
• Pumps and process engineering. Grundfos, in Bjerringbro in the Central Denmark Region, files heavily in circulator and dosing pump technology. This is classic sectional-view work, where flow paths, seals and impeller geometry have to be legible through hatching rather than buried by it.
• Food technology. Arla Foods has its headquarters at Viby J in Aarhus, and Danish Crown operates from Randers. Dairy and protein process filings mean plant schematics and flow diagrams — precisely the category where the EPO’s limit on text matter conflicts most sharply with how process engineers normally annotate a diagram.
• Software and control systems. Aarhus has a substantial software base, including Systematic and Stibo, and Aarhus University feeds a steady stream of spin-out filings. Control and data-processing inventions are disclosed through flowcharts, state diagrams and block diagrams, which are accepted figures but only when each box carries a reference numeral reconciled to the description.

Across all four the recurring defect is the same: a figure produced for a different audience — a design review, a manufacturing drawing, a conference paper — that was never re-tested against the claims. Fixing the view list before anyone opens a CAD package is the cheapest intervention available, and it is where a patent drawing Aarhus project earns most of its value. Our guide to patent drawing sectional views covers the hatching conventions this work depends on.

Where Aarhus patent disputes are heard

Denmark concentrates patent litigation, and for a Jutland applicant the venue is not local.

• Maritime and Commercial High Court — the Sø- og Handelsretten in Copenhagen, founded in 1861, is Denmark’s first-instance patent court. An Aarhus company suing on a Danish patent litigates in Copenhagen. Its composition is the feature worth planning for: as a general rule two technical judges sit with one legally trained judge, and in cases of particular complexity further judges may be added. Technically qualified judges read the figures as engineers, which raises the return on a clear figure set and the cost of a sloppy one.
• High Court of Western Denmark — Vestre Landsret, sitting in Viborg in the Central Denmark Region, is the appellate court for Western Denmark; judgments of the Maritime and Commercial High Court are appealed to the High Court of Eastern or Western Denmark, and in rare circumstances to the Supreme Court.
• Unified Patent Court, Copenhagen local division — Denmark ratified the UPC Agreement and hosts a local division in Copenhagen. For European patents with unitary effect the UPC is exclusively competent; during the transitional period national courts retain shared jurisdiction over classical European patents that have not been opted out, so an Aarhus portfolio can face both forums at once.

In every one of these venues the drawings are read as part of the disclosure rather than as illustration, which is why figure quality is an enforcement input and not only a filing formality.

Seven checks before you file from Aarhus

1. Fix the route first — DKPTO national filing, brugsmodel, PCT national phase at 31 months from priority, or EPO regional phase. The route decides the standard.
2. Build to the strictest applicable rule and relax deliberately: 37 CFR 1.84 for a US co-filing, PCT Rule 11.13(a) black lines for the international phase, EPO Guidelines A-IX for Europe.
3. Plan the colour variants. Colour and greyscale are acceptable for an electronic EPO filing since 1 October 2025, but not under PCT Rule 11.13(a).
4. Strip sheet text to genuinely indispensable keywords, placed so a Danish or English translation can replace them without redrawing the line work.
5. For large-scale wind structures, state the scale relationship between the general view and the enlarged partial views rather than leaving it implied.
6. Reconcile every reference numeral against the description and claims in both directions — neither a brugsmodel registration nor a DKPTO formalities check will do it for you.
7. If the family is going to Denmark only, price the brugsmodel against the patent: no inventive-step requirement, registration in months, ten years of protection.

IP Landscape & Resources in Aarhus

Key intellectual-property authorities and venues relevant to Aarhus:

• DKPTO — Danish Patent and Trademark Office — Patent- og Varemærkestyrelsen, the national office for Danish patents and utility models
• Danish Consolidate Utility Models Act (WIPO Lex) — the brugsmodel regime — novelty and industrial applicability, no inventive-step requirement
• EPO Guidelines for Examination — Part A, Chapter IX — the current European drawing requirements since Rule 46 EPC was deleted
• Unified Patent Court — Denmark participates in the UPC and hosts a local division in Copenhagen

Request Patent Drawing Services in Aarhus

Explore related PerspireIP services: Patent Drawing services · patent drawing services in Copenhagen · our Denmark IP services.

Frequently Asked Questions