Marks & Clerk is one of the UK’s largest, and longest established, intellectual property firms. Our expert teams of patent and trade mark attorneys and lawyers are wired directly into the UK’s innovation economies via our offices in London, Birmingham, Manchester, Oxford, Cambridge, Edinburgh, Glasgow and Aberdeen. Alongside our presence in the UK, we also have offices in nine international locations covering the EU, Canada and Asia, meaning we can tap into local expertise, globally.
Our team provides a full-service IP offering, from the initial filing of IP, through to litigation and commercial exploitation. Having seen the benefits that our clients derive from our full-service model, a number of patent attorney firms have since sought to follow a similar approach by adding solicitors to their teams. However, our well-established and highly regarded litigation and commercial transactions practices continue to set us apart from other firms.
We are experts not only in intellectual property law, but also in the science and technology that underpins our clients’ businesses. Our ability to draw upon this specialist technical expertise, not just in the context of patent prosecution but also in the context of litigation and commercial transactions, enables us to provide clients with a level of service and reach unmatched by other firms.
Osler’s top-ranked Intellectual Property team is renowned for its deep bench strength, featuring excellence in IP litigation; a stellar record in blockbuster patent and trade-mark prosecution; expertise in portfolio advising and management; and unmatched experience in helping realize the value of IP portfolios in mergers, reorganizations and other business transactions.
The team has a well-earned international reputation for excellence in Canadian IP litigation, including cross-border matters, built on our winning trial record representing some of the world’s most prominent companies and innovators in resolving their ground-breaking patent, copyright and trade-mark disputes in Canada.
Osler’s Intellectual Property professionals offer proven expertise and superior service for clients of all sizes across a broad range of industries, including pharmaceuticals, biotech, technology, life sciences, electronics, aeronautics, consumer products, sports and entertainment, food services, and mechanical, chemical and software engineering.
We have extensive experience in drafting, filing, prosecuting and maintaining patent and industrial design applications in Canada, including for leading Canadian and multinational companies. Our patent agents, most of whom are PhD or Masters qualified, are highly proficient in dealing with patent protection and patent avoidance issues in the design, engineering and manufacturing of products, and particularly products to be distributed simultaneously in multiple jurisdictions. We regularly conduct freedom-to-operate studies and render opinions in respect of Canadian patents for our clients.
Osler has in-depth experience in clearing, registering, maintaining and enforcing trade-mark rights in Canada and internationally, on managing domestic and international portfolios for leading Canadian and global corporations and in successfully representing clients’ interests before the courts and intellectual property administrative tribunals. We also service an extensive network of foreign law and agency firms, assisting those firms in protecting the Canadian rights of their clients. For many consecutive years, Osler has been among the top filers of trade-mark applications with the Canadian Intellectual Property Office (“CIPO”).
Osler’s Intellectual Property team also represents clients in disputes and litigation involving copyright (including infringement claims, ownership disputes and Copyright Board tariff proceedings), trade-marks (including infringement claims, expungement proceedings and Trade-Mark Opposition Board proceedings), domain names, trade secrets/confidential information, anti-counterfeiting and misleading advertising.
Founded in 2006 with offices in London and Toronto, Brunet & Co is a privately held Canadian law firm specialising in intellectual property (IP) law . With a focused team of patent agents, lawyers, engineers, scientists, and business development professionals, Brunet & Co serves both Canadian clients and international corporations seeking IP protection in Canada.
Expertise & Services
The firm offers a full suite of services across patents, trademarks, industrial designs, and IP litigation. They have deep sector knowledge in pharmaceuticals, chemicals, life sciences, and software, and provide comprehensive support ranging from global patent prosecution to trademark filings and enforcement.
Their technology-driven processes automate patent filings with the Canadian Intellectual Property Office, enhancing efficiency and speeding time to filing.
Global Reach
While headquartered in London, Ontario, and maintaining a presence in Toronto, Brunet & Co operates internationally ─ supporting clients from the USA, Europe, and Asia to secure IP rights in Canada via a harmonised legal approach.
Key Strengths
Highly specialised technical expertise: in-house engineers, chemists and patent lawyers collaborate to craft high-quality patent applications.
Streamlined processes: automated workflows and close integration with corporate IP teams standardise filings, communications, and invoicing.
Industry recognition: recently named an Award‑Winning Law Firm in Canada by The Patent Lawyer Magazine 2025
brunetco.com.
Clients & Culture
Brunet & Co serves a diverse client base including startups, multinational corporations, and academic institutions. With a tight-knit team of fewer than ten professionals, they emphasise personalised client service, strategic IP counselling, and international collaboration.
PCK Intellectual Property is a boutique firm with a global client base.
We are recognized for excellence in originating patent drafting, and in the preparation and filing of patent and trademark applications. PCK is also known for its automated workflows, flat-rate billing, and competitive fees that offer transparency and efficiency.
Our professionals are lawyers, patent and trademark agents, scientists, and engineers with strong theoretical grounding in science, math, and software. This foundation makes us agile and deeply knowledgeable in cutting-edge technologies and modern business models.
PCK is home to seasoned general counsel, commercial advisors, and litigation counsel with experience across a wide range of industries and technologies. We support a full suite of intellectual property and related commercial services, including IP identification, protection, portfolio management, strategy, commercialization, dispute resolution, and litigation.
We work closely with clients to tailor strategies that align with their goals, protect their innovations, and drive value.
PCK is as innovative as you are.
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