Patent Translation Services

A patent claim is not a description of a machine. It is a legal definition of a monopoly, and every word in it either widens or narrows what the owner can stop competitors doing. That is why patent translation sits apart from ordinary technical translation: the translator is not just carrying meaning across, they are preserving legal scope.

The words that decide scope

English patent drafting leans on terms of art with settled legal meanings. "Comprising" is open-ended: a claim to a device comprising A, B and C still covers a device with A, B, C and D. "Consisting of" is closed. A translator who renders both with the same everyday word has quietly rewritten the scope of the monopoly. The same discipline applies to antecedent basis ("a fastener... said fastener"), to functional language ("means for"), and to the difference between "about", "substantially" and "approximately", each of which carries case law.

Errors are expensive in a specific way

In most translation work a mistake causes confusion. In patent translation it causes narrowing, unenforceability or invalidity, and in several jurisdictions the granted translation is the legally operative text: if the translation claims less than the original, the owner is usually stuck with less. Correction procedures exist but are limited, and a competitor can rely on the narrower scope in the meantime. This is why every patent we translate is handled by a linguist with a technical background in the field of the invention and revised by a second specialist before delivery.

Fidelity to the drawing pack

Claims, description, abstract and drawings must stay consistent: reference numerals, part names and units have to match across all of them. Where drawings carry text, our multilingual DTP team reproduces the figures with translated callouts so the filing package arrives ready to submit.

Most patent translation is driven by a deadline set by treaty or statute, not by preference. Knowing which deadline you are working to changes how the job is scoped and priced.

Swipe sideways to see all three columns.

Validation and unitary translations run as one coordinated batch, so nothing is filed late in any state and every country pays once for the shared wording.

Office actions, oppositions and everything in between

Prosecution generates a steady stream of two-way translation: examiner communications and cited prior art coming in, amended claims and arguments going out. Because we keep translation memory per patent family, amended text is translated against the record, so the wording your examiner saw last time stays consistent this time.

The EPO works in English, French and German. Which of the three you file in matters less than what happens at grant: before a European patent is granted, the claims must be translated into the other two official languages. These claim translations are part of the published patent and are read by competitors, licensees and courts across Europe, so they deserve the same care as the original drafting.

Machine translation has a defined place, and it is not filing

Free patent machine translation is genuinely useful for a first read. It is not legally reliable text, and no serious attorney files or litigates on one.

Our position is pragmatic rather than purist:

• Information-grade: internal prior art review runs through machine translation post-editing at a fraction of full-translation cost, clearly labelled
• Filing and evidence grade: anything filed, cited or put before a court is translated by a human specialist and independently revised

Certified translations for courts and offices

Where a national court or patent office requires a certified translation of a patent document, we provide the signed certification with the translation. Our certification practice is the same one UK courts and public bodies see from us daily.

Patent disputes are document-heavy and multilingual by nature: the closest prior art has an inconvenient habit of being in Japanese or German. Litigation translation has two distinguishing features: the volume is unpredictable, and the standard is absolute, because the other side's translators will be looking for daylight between your translation and the original.

What we translate in disputes

• Prior art for invalidity attacks and defences: patents, journal articles, product manuals, standards documents
• The patent in suit where proceedings run in another language, including certified translations for the court file
• File wrapper material: examination correspondence relied on for prosecution history arguments
• Evidence: technical reports, laboratory notebooks, internal correspondence produced in disclosure
• Expert reports travelling in either direction between jurisdictions

Two service levels, chosen deliberately

Litigation teams rarely need every document at evidence grade. The economical pattern we run for law firms: information-grade translation across the full disclosure set to find what matters, then evidence-grade certified translation of the documents that will actually be relied on. You choose the level per document; we flag anything where the information-grade text looks material enough to warrant upgrading. Our legal translation practice supports the surrounding case documents: witness statements, contracts, licences and correspondence.

Four language pairs dominate serious patent work, because they map to the world's largest filing offices alongside the EPO and USPTO. Each has failure modes that generalist translators fall into.

German

German technical drafting builds long compound nouns that pack an entire claim limitation into one word, and unpacking them wrongly changes scope. German also distinguishes shades of connection ("verbunden", "gekoppelt", "befestigt") that must map consistently onto "connected", "coupled" and "fixed" throughout a family, not interchangeably within one document.

Japanese

Japanese claims routinely omit grammatical subjects and plurals, both of which English claims cannot live without, so the translator is constantly making scope decisions that must be technically informed rather than guessed. Katakana loanwords look like English but often are not the term the drafter meant, and JPO conventions for reference wording differ enough from EPO style that a literal rendering reads as ambiguous.

Chinese

Chinese has no articles and no inflection for number, while CNIPA practice leans on the particle 所述 ("the said") to carry antecedent basis. Translating in either direction means rebuilding the claim's internal reference structure explicitly, and doing it the same way every time it appears.

Korean

KIPO filings combine Sino-Korean technical vocabulary with conventions borrowed from Japanese practice, and the same care over subjects, number and antecedent basis applies. For all four pairs our translators work into their native language with a second specialist reviewing against the source, claim by claim.

Three operational things matter to every patent client, whatever the technology.

Confidentiality that assumes the worst

Unpublished applications are among the most sensitive documents a company owns: premature disclosure can destroy novelty. Patent work runs under NDA by default, access inside our team is restricted to the linguists on the job, files move over encrypted transfer and are stored in the UK, and we are happy to work inside your own secure environment where firm policy requires it. We sign your confidentiality terms rather than asking you to accept ours.

Deadlines that do not move

National phase dates, validation windows and office action terms are statutory. Our workflow is built backwards from the filing date with an internal buffer, and our urgent service exists for the genuinely compressed cases: a same-week specification translation is unusual but achievable when it has to be.

Cost control without scope risk

Patent translation is priced per word, typically £0.14 to £0.20 depending on the language pair and the technical field. Two mechanisms keep programme costs down honestly. Translation memory across a patent family means divisionals, continuations and amended texts reuse approved wording, with repetition discounts of up to 50% applied automatically. And the information-grade tier via post-edited machine translation gives you a defensible cheap option for the documents that only need to be understood, never filed. The online quote prices a specific document in minutes; for portfolio programmes, our enterprise arrangements add volume rates and consolidated invoicing.