Independent Thinking Collective Excellence

Who We Are

Ranked in tier 1 by The Legal 500 and Chambers and Partners, we are one of the largest UK and European Patent and Trade Mark Attorney firms, with offices in LondonOxford, Cambridge, Paris and Munich. Established in the 1940s by our founder, John Arthur Kemp, we have grown to become one of a handful of leading UK firms with a strong international practice.

The breadth and depth of our technical knowledge relevant to patents is outstanding, with over 70 science and technology graduates in the firm including over 30 PhDs. No area of science or technology is outside our scope.

Our trade marks team comprises senior professionals with backgrounds in major international law firms. The team has the expertise and resources to handle any trade marks matter.

Our People

What We Do

We draft, file and prosecute patent applications in the UK, Europe and the rest of the world. We handle patent oppositions and appeals within Europe, especially before the European Patent Office. We add value to your business by advising on patent strategy, such as where and when to file applications. We can help you to manage your patent portfolios in individual countries, regionally or worldwide.

We advise on trade mark selection and strategy and we file, defend and oppose trade mark applications in the UK, Europe and the rest of the world. We can obtain global protection for your trade marks through international applications before the World Intellectual Property Organization (WIPO) and by instructing filing and prosecution programmes worldwide.

We handle all aspects of design protection in the UK, Europe and the rest of the world.

We conduct intellectual property litigation and other contentious intellectual property matters in the High Court of England and Wales, the Intellectual Property Enterprise Court, the UK Intellectual Property Office and the European Union Intellectual Property Office, plus their respective appeal courts. In due course we will handle such matters in the Unified Patent Court.

Our Specialisms

Why Choose Us?

We set great store by what our clients say about our service standards. Here are some comments from our clients sourced from the legal and IP directories and our own client survey.

Managing Intellectual Property

"Clients are most impressed with the work of J A Kemp. The team are highly responsive, intensely hard-working, and uniformly thoughtful in their handling of prosecution and post-prosecution matters (e.g. oppositions). They are proactive and induce a high degree of confidence." 

Chambers and Partners

"I am really impressed with them.  The team is very proactive, strategic and thinks about the best way to move forward."

IAM Patent 1000

"The firm's partners have become trusted colleagues over the years."

IAM Patent 1000

"J A Kemp offers some of the finest patent services in Europe, delivers cast-iron protection for inventions of all types and conducts sterling opposition and appeal work at the EPO."

The Legal 500

"J A Kemp’s team of trade mark attorneys are true experts and above all extremely commercial."  

Overseas Attorney Firm

"I don’t work with anyone as good.  I recommend J A Kemp because it’s good for my clients."

J A Kemp Client

"J A Kemp gives good, clear, commercial recommendations."

World Trademark Review 1000

J A Kemp is "a go-to for UK and European trademark matters – its expert practitioners provide practical advice quickly and for a fair price, and impress at every turn".

Chambers and Partners

"A first-class firm that brings a high level of expertise to every job, be it large or small."

Overseas Attorney Firm

"J A Kemp is my preferred firm because the level of service and understanding of the client’s technology is great."

J A Kemp Client

"We want the best protection available and I give J A Kemp the highest marks possible."

Chambers and Partners

"It is an excellent firm with a truly first-rate group of attorneys."

J A Kemp Client

"J A Kemp has a very 'can do' attitude for jobs which are complex."

IAM Patent 1000

"J A Kemp is extremely knowledgeable and does a fantastic job."

J A Kemp Client

"If I want an opinion I’ll go with J A Kemp."

IAM Patent 1000

"The whole team is extremely knowledgeable of the underlying subject matter and also of EU patent practice - they do a valuable analysis of the specifications to optimise the patent’s strength."

J A Kemp Client

"I would recommend J A Kemp when people need some extra input."

Overseas Attorney Firm

"These are some of the most detailed and thorough instructions that I have ever seen. They evidence a keen understanding of US practice."

Overseas Attorney Firm

"I cannot thank you enough for your expert advice and careful strategic thinking in this matter."

Work At J A Kemp

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