Company lists · Data refreshed September 2026

Top 25 International patent law firms based in the United Kingdom

Name: International patent law firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 230 companies tracked

RevenueBase identified 230 international patent law firms headquartered in the United Kingdom as of September 2026 and tracks 5,141 professional contacts across them, including 3,190 with verified work emails and 291 with mobile numbers. London is the largest hub.

This list covers international patent law firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

230Companies

5,141Contacts tracked

3,190Verified emails

291Mobile numbers

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The 25 largest international patent law firms based in the United Kingdom

Ranked by team size

Top 25 of 230 international patent law firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 4, 2026. RevenueBase Smart Search rates how each company's information relates to international patent law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Marks & Clerk	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	501-1,000	568 contacts →
	Indirect evidence “We’re true specialists – focusing on IP and IP alone.” Source: RevenueBase Database · checked Sep 4, 2026
2	HGF Limited	Indirect evidence	Leeds, United KingdomHQ checked Sep 4, 2026	201-500	541 contacts →
	Indirect evidence “HGF is one of Europe’s largest firms of Intellectual Property specialists.” Source: RevenueBase Database · checked Sep 4, 2026
3	Carpmaels & Ransford	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	282 contacts →
	Indirect evidence “Carpmaels & Ransford LLP The European Intellectual Property Firm Carpmaels & Ransford is a full-service European intellectual property firm at the forefront of a rapidly changing…” Source: RevenueBase Database · checked Sep 4, 2026
4	DEHNS	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	231 contacts →
	Indirect evidence “Founded in 1920, Dehns is one of Europe’s largest full service intellectual property firms, with offices in London, Munich, Oslo, Oxford, Bristol, Brighton, Manchester and…” Source: RevenueBase Database · checked Sep 4, 2026
5	J A Kemp	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	225 contacts →
	Partial evidence “J A Kemp is a firm packed with patent and trade mark attorneys at the top of their game, renowned for their technical excellence, human engagement and trusted advice.” Source: RevenueBase Database · checked Sep 4, 2026
6	Mathys & Squire LLP	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	199 contacts →
	Partial evidence “Mathys & Squire is a top-tier European intellectual property (IP) law firm with 115+ years of experience supporting innovation-driven businesses.” Source: RevenueBase Database · checked Sep 4, 2026
7	Venner Shipley	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	189 contacts →
	Partial evidence “Venner Shipley is a top-tier European full-service intellectual property firm, providing an innovative, bespoke service through our team of expert European and UK patent, trade…” Source: RevenueBase Database · checked Sep 4, 2026
8	Appleyard Lees IP LLP	Strong evidence	Halifax, United KingdomHQ checked Sep 4, 2026	51-200	171 contacts →
	Strong evidence “Appleyard Lees is a leading intellectual property law firm, with over eighty patent and trade mark attorneys and litigators.” Source: RevenueBase Database · checked Sep 4, 2026
9	BOULT	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	166 contacts →
	Partial evidence “We are a leading European IP patent, design and trade mark firm recognised throughout the IP world for its commercial awareness and commitment to clients.” Source: RevenueBase Database · checked Sep 4, 2026
10	Johnsons	Partial evidence	Edinburgh, United KingdomHQ checked Sep 4, 2026	11-50	144 contacts →
	Partial evidence “Chartered Patent Attorneys, European Patent Attorneys, Trade Mark Attorneys.” Source: RevenueBase Database · checked Sep 4, 2026
11	Gill Jennings & Every LLP	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	112 contacts →
	Partial evidence “Gill Jennings & Every LLP is a leading firm of European Patent and Trade Mark Attorneys with offices in London and Munich.” Source: RevenueBase Database · checked Sep 4, 2026
12	Keltie	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	110 contacts →
	Indirect evidence “Keltie is a European IP firm with a unique personality.” Source: RevenueBase Database · checked Sep 4, 2026
13	Maucher Jenkins	Strong evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	108 contacts →
	Strong evidence “Maucher Jenkins is a pan-European intellectual property firm of UK, German and European Patent and Trade Mark Attorneys, Attorneys-at-Law and IP Litigators, uniquely placed to…” Source: RevenueBase Database · checked Sep 4, 2026
14	Abel Imray	Strong evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	101 contacts →
	Strong evidence “At Abel + Imray, we blend legal experience with commercial awareness to advise and represent our clients on all aspects of patent, trade mark, and design law in the UK, Europe and…” Source: RevenueBase Database · checked Sep 4, 2026
15	Elkington Fife	Partial evidence	Sevenoaks, United KingdomHQ checked Sep 4, 2026	51-200	70 contacts →
	Partial evidence “Elkington + Fife is a leading firm of patent attorneys and trade mark attorneys.” Source: RevenueBase Database · checked Sep 4, 2026
16	Powell Gilbert	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	69 contacts →
	Partial evidence “Powell Gilbert is a boutique law firm dedicated to IP and to serving knowledge, technology and brands based industries.” Source: RevenueBase Database · checked Sep 4, 2026
17	Page White Farrer	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	61 contacts →
	Indirect evidence “All our practitioners focus on particular technologies or IP disciplines to provide you with a winning combination of technical knowledge, business acumen and a sound appreciation…” Source: RevenueBase Database · checked Sep 4, 2026
18	Brandsmiths	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	58 contacts →
	Partial evidence “Brandsmiths is the UK's leading IP law firm, built for brands with offices in London and Manchester.” Source: RevenueBase Database · checked Sep 4, 2026
19	Wilson Gunn Patent & Trade Mark Attorneys	Partial evidence	Manchester, United KingdomHQ checked Sep 4, 2026	51-200	52 contacts →
	Partial evidence “Wilson Gunn is a leading UK firm of patent and trade mark attorneys, with offices in Manchester, Birmingham, Liverpool, Chesterfield, London and Glasgow.” Source: RevenueBase Database · checked Sep 4, 2026
20	Slingsby Partners LLP	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	47 contacts →
	Indirect evidence “We help technology companies protect and commercialise their intellectual property across the UK and Europe.” Source: RevenueBase Database · checked Sep 4, 2026
21	Cleveland Scott York	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	46 contacts →
	Indirect evidence “Cleveland Scott York is one of Europe’s leading intellectual property firms.” Source: RevenueBase Database · checked Sep 4, 2026
22	Stratagem IPM Limited	Indirect evidence	Toft, United KingdomHQ checked Sep 4, 2026	51-200	45 contacts →
	Indirect evidence “EMPOWERING YOUR BUSINESS WITH THE RIGHT IP SOLUTION At Stratagem, we’ve been helping businesses turn ideas into assets since Our vision is simple: a future where intellectual…” Source: RevenueBase Database · checked Sep 4, 2026
23	Beck Greener LLP	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	44 contacts →
	Partial evidence “A specialist firm of patent attorneys, trade mark attorneys, design attorneys & IP litigators, Beck Greener has offices in London and close to the EUIPO in Alicante.” Source: RevenueBase Database · checked Sep 4, 2026
24	Stevens Hewlett & Perkins	Indirect evidence	Bristol, United KingdomHQ checked Sep 4, 2026	11-50	40 contacts →
	Indirect evidence “Stevens Hewlett & Perkins (SH & P) are a leading firm of intellectual property lawyers based in Bristol.” Source: RevenueBase Database · checked Sep 4, 2026
25	WP Thompson	Indirect evidence	Liverpool, United KingdomHQ checked Sep 4, 2026	51-200	34 contacts →
	Indirect evidence “The firm is a specialist IP prosecution and litigation firm.” Source: RevenueBase Database · checked Sep 4, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: international patent law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names international patent law firms.
Partial evidence: Its own public description names part of international patent law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name international patent law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 230 international patent law firms based in the United Kingdom

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International patent law firms based in the United Kingdom at a glance

As of Sep 4, 2026

62.1%Verified-email coverage

5.7%Mobile-number coverage

22.4Average contacts per company

1-10Median size (employees)

32.6%Largest-city concentration · London

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

115

11-50

51-200

201-500

501-1,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

26331–60

1,64461–90

1,28290–180

1180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among international patent law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “international patent law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names international patent law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among international patent law firms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 3,190 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 4, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

International patent law firms by metro

International patent law firms in London75

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names international patent law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many international patent law firms are there based in the United Kingdom?

RevenueBase identified 230 international patent law firms headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Marks & Clerk, headquartered in Oxford, tops this list with the largest team on record.

Which city has the most international patent law firms?

London leads with 75 headquartered companies, followed by Cambridge (8) and Leeds (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,190 verified decision-maker contacts tracked across these 230 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 4, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.