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Switzerland files more patents per capita than almost any country on earth, yet the way you actually secure protection there surprises most foreign applicants. Understanding how to file a patent in Switzerland means choosing between three genuinely different routes, and the standard national patent is granted without any check on novelty or inventive step. Pick the wrong path and you can overpay, miss a hard deadline, or end up with a right that collapses the first time it is tested. This guide walks through each route, the costs, the enforcement forum, and the 2027 reform that changes the rules.
How to File a Patent in Switzerland: The Three Routes
There is no single door into the Swiss system. When clients ask us how to file a patent in Switzerland, the honest answer is that three routes reach the same country, and the best one depends on where else you want protection and how much certainty you need on day one.
- A national Swiss patent filed directly with the Swiss Federal Institute of Intellectual Property (IPI, the IGE in German).
- A European patent granted by the European Patent Office (EPO) and then validated in Switzerland, because Switzerland is a member of the European Patent Convention (EPC).
- The PCT national phase, if your invention started life as an international (PCT) application and you now want Swiss coverage.
A national filing suits an applicant who wants Switzerland (and Liechtenstein) and nothing more. The European route makes sense when Switzerland is one of several European markets. The PCT route is simply the tail end of an international filing strategy. Each one has a different price tag, timeline, and level of scrutiny before grant.
Route 1: A National Swiss Patent at the IPI
A direct national application goes to the IPI in Bern. You can file in German, French, or Italian, the three official languages, and the term is 20 years from the filing date, subject to annual renewal fees. So far this looks like any other patent office. It is what the IPI does not do that matters.
The IPI examines formalities, patentable subject matter, clarity, and unity, but it does not examine your application for novelty or inventive step. A Swiss national patent is granted “without guarantee.” That means it issues quickly and cheaply, but its validity is only ever tested if a competitor attacks it in court. If your claims were not actually new, the patent can be revoked the moment someone challenges it.
One detail foreign applicants routinely miss: a Swiss national patent automatically covers the Principality of Liechtenstein as well. Under a 1978 treaty the two countries form a single patent territory, so one filing protects both. Because the IPI does no substantive search, you should run your own novelty check first; the office even offers an optional Swiss patent application search or an international-type search you can order after filing.
Route 2: A European Patent Validated in Switzerland
Switzerland is an EPC member, so you can obtain protection through a single European patent application at the EPO and then validate the granted patent in Switzerland. This is the route most large filers use, because one EPO examination covers up to 40 or so European states at once, and Switzerland is examined for novelty and inventive step as part of that process, unlike the national route.
Two points on the Swiss validation deserve care. First, Switzerland is a London Agreement country, which means no full translation of the granted European patent into a Swiss language is required for validation. Second, a European patent validated in Switzerland also automatically extends to Liechtenstein, mirroring the national rule.
Now the distinction almost everyone gets wrong. Switzerland is in the EPC, but it is not in the European Union and not in the Unitary Patent or the Unified Patent Court (UPC) system. The new EU Unitary Patent does not cover Switzerland. You cannot get Swiss coverage through a Unitary Patent; you must validate the classic European “bundle” patent in Switzerland, and any dispute is heard by the Swiss courts, never the UPC. EPC membership and UPC membership are two different things, and confusing them is an expensive mistake.
Route 3: The PCT National Phase in Switzerland
If you filed an international application under the Patent Cooperation Treaty, you can bring it into Switzerland. You have 30 months from your earliest priority date to act, and Switzerland does not allow that deadline to be restored, so treat it as immovable.
There are two ways in. You can enter the Swiss national phase directly at the IPI, filing a translation into German, French, or Italian. Or you can enter the European regional phase at the EPO (the “Euro-PCT” route) and later validate the resulting European patent in Switzerland with no separate validation step needed. Applicants seeking coverage across several European countries almost always choose the Euro-PCT route; those who want only Switzerland and Liechtenstein often go national to save cost.
- Direct national phase at the IPI: fastest for a Switzerland-only strategy, but no novelty examination.
- Euro-PCT via the EPO: one examination, then validate in Switzerland and any other EPC states you want.
What the 2027 Swiss Patent Reform Changes
The unexamined national patent is about to be modernised. A revised Swiss Patents Act enters into force on 1 January 2027, and it reshapes the national route in three ways that matter to anyone planning a filing now.
- A mandatory prior-art search. The IPI will prepare a state-of-the-art search report for every national application and publish it alongside the filing, so third parties can see how strong the claims really are.
- An optional full examination. Applicants will be able to choose a partially examined patent, as today, or a fully examined national patent tested for novelty and inventive step to international standards, comparable to an EPO grant.
- English documentation. Technical documents will be accepted in English without a translation into an official Swiss language, lowering the entry cost for foreign applicants.
If certainty matters for your invention, the fully examined national patent arriving in 2027 will be a serious alternative to routing everything through the EPO. Until then, plan around the current unexamined system and verify novelty yourself before you rely on a Swiss national grant.
Costs, Timelines, and Deadlines You Can’t Miss
A national Swiss filing is one of the cheaper ways into a high-value European market, precisely because there is no substantive examination to pay for. The European route costs more up front (EPO examination and validation) but delivers an examined right and multi-country reach. Whichever route you take, the deadlines are unforgiving.
- Priority: 12 months from a first filing to claim priority in Switzerland or via the PCT.
- PCT national phase: 30 months from priority to enter Switzerland; not restorable.
- EP validation: validate the granted European patent in Switzerland within the EPO’s post-grant window.
- Renewals: annual maintenance fees keep the patent alive for its full 20-year term.
Because a Swiss national patent is unexamined, its commercial value depends entirely on whether the underlying claims would survive a challenge. That is where a professional novelty or validity search pays for itself before you spend money enforcing a right that might not hold up.
Where Swiss Patents Are Enforced
Switzerland has a single specialised forum for patent disputes: the Swiss Federal Patent Court (Bundespatentgericht) in St. Gallen. It hears both infringement and validity for national patents and for European patents validated in Switzerland, and its judges include technically qualified experts. Appeals go to the Federal Supreme Court.
Because Switzerland sits outside the UPC, a Swiss validation is never swept into a pan-European injunction the way a Unitary Patent can be. For some patentees that isolation is a feature, not a bug. For a fuller picture of the forum and its remedies, see our guide to patent litigation in Switzerland, and if your route runs through the EPO, our guide to validating a European patent in Switzerland. Companies operating across the country’s innovation hubs can also review our local teams for Zurich, Basel, and Geneva, all reachable from our Switzerland hub.
How PerspireIP Can Help You File in Switzerland
Choosing between a national IPI filing, a European patent, and the PCT route is a strategy call, not a form-filling exercise, and the unexamined Swiss grant makes a solid prior-art search essential. PerspireIP runs novelty, patentability, and validity searches and supports drafting and foreign filing so your Swiss right is built to survive a challenge. Contact our team to map the right route for your invention.
Frequently Asked Questions
Does Switzerland examine patents for novelty?
Not for standard national patents. The IPI checks formalities and subject matter but not novelty or inventive step, so a Swiss national patent is granted without guarantee. That changes from 1 January 2027, when an optional full examination becomes available.
Can I get a Swiss patent through the European Patent Office?
Yes. Switzerland is an EPC member, so you can obtain a European patent at the EPO and validate it in Switzerland. No full translation is needed because Switzerland is a London Agreement country.
Does the EU Unitary Patent cover Switzerland?
No. Switzerland is in the EPC but not the EU, so the Unitary Patent and the Unified Patent Court do not reach it. You must validate a classic European patent in Switzerland, enforced by the Swiss Federal Patent Court.
Does a Swiss patent also cover Liechtenstein?
Yes. Switzerland and Liechtenstein form a single patent territory under a 1978 treaty, so one national filing or Swiss validation protects both automatically.
What is the deadline to enter the PCT national phase in Switzerland?
You have 30 months from your earliest priority date to enter Switzerland, either at the IPI directly or via the European regional phase. The 30-month deadline cannot be restored, so diarize it carefully.