IAM Research

The Patent 1000 focuses exclusively on patent practice and has firmly established itself as the definitive 'go-to' resource for those seeking world-class legal patent expertise.

Recommended - Individuals: prosecution and nullity

Munich-based IP firm WALLINGER RICKER SCHLOTTER TOSTMANN combines the talents of patent attorneys and attorneys at law to offer a wraparound service which never leaves clients wanting. Its 20-strong team has earned the loyalty of myriad leading innovators such as BMW, Fresenius Medical Care, Boehringer Ingelheim and Immunolight, which provides energy conversion technology for the medical and commercial industries. Taking care of BMW’s prosecution needs are Michael Wallinger and Michael Platzoeder; while attorney at law Thomas Schachl – a seasoned patent litigator and orchestrator of parallel proceedings – has been counselling the auto manufacturer in litigation. Namesake Wallinger has been in the game since the 1980s and is lauded as “one of the true greats in the German patent space”; while high-technology group Platzoeder is a physicist who previously worked in the IP department of global semiconductor supplier Infineon Technologies. Heading up the chemistry and pharmaceutical group are co-founders and doctors of chemistry Mathias Ricker and Holger Tostmann. Ricker joined forces with Platzoeder on the Fresenius work, which involves strategic advice, opposition proceedings and the drafting of AI-related patent applications; while IAM Patent 1000 newcomer Tostmann has an enviable success rate in oppositions and is managing Immunolight’s portfolio. Also appearing in the rankings for the first time are chemist Christiane Maxien, who joined the partnership in 2018; and biotechnology doyenne Cornelia Oetke, who has a flair for advancements such as small molecules and antibodies, and recently assisted Boehringer Ingelheim with patent prosecution and opposition proceedings.

Mathias Ricker's Profile

Mathias Ricker is one of the founding partners of law firm Wallinger Ricker Schlotter Tostmann. He is part of the chemistry/pharmaceutical IP practice group, which has five partners.

Before co-founding Wallinger Ricker Schlotter Tostmann, Dr Ricker was a partner with Jones Day, also acting as European IP coordinator. He holds a PhD in chemistry and was admitted as a German patent attorney in 1994 and as a European patent attorney in 1995.

Dr Ricker has been active in the IP field since 1991. His activities have focused, and still do, on the areas of chemistry, pharmaceuticals and medical devices. He is active in counselling domestic and foreign clients in all areas of patent matters. In the past couple of years, his activities have concentrated on the representation of clients in opposition and nullity proceedings before the European Patent Office and the Federal Patent Court, as well as in infringement proceedings – in many instances, together with Wallinger Ricker Schlotter Tostmann’s attorneys at law.

Dr Ricker recently represented Merz Pharma GmbH in various oppositions and appeals with Allergan in the area of dermal fillers and muscle relaxants/BOTOX, as well as Eastman Chemicals in the area of ‘green’ polycarbocylic acids for the preparation of polyesters against Synvina/Avantium. Other significant representations include Archroma IP GmbH (the former paper and textile business of Clariant), Autoneum, Bridgestone/Firestone, Eastman Chemicals, Fresenius Medical Care AG, Gate Group, International Paper, Merck AG Darmstadt, Nippon Shokubai and Verbio AG.

Located in Munich, Wallinger Ricker Schlotter Tostmann started with five attorneys in 2007 and has grown to include over 20 patent attorneys and attorneys at law, representing clients from all over the world and across the full spectrum of industries.

Firm Profile

Wallinger Ricker Schlotter Tostmann is an internationally active, well-established and consistently top-tier ranking IP law firm located at the heart of Europe’s IP capital, Munich, beside the headquarters of both the EPO and the German Patent and Trademark Office, as well as close to the Federal Patent Court, the Munich IP litigation courts and the future Unified Patent Court. The firm’s European and German patent attorneys and attorneys at law represent clients from all over the world and across the full spectrum of industries. Wallinger Ricker Schlotter Tostmann engages in all matters of intellectual property, including:

  • prosecution, enforcement, defence and licensing of patents, trademarks and design rights;
  • copyright and unfair competition matters;
  • IP-related transactions;
  • freedom-to-operate analyses;
  • intellectual property in M&A, including IP due diligence and IP agreements; and
  • alternative dispute resolution.

Wallinger Ricker Schlotter Tostmann is particularly active in contentious matters, with a focus on patent and trademark litigation before German courts, including the German Supreme Court, oppositions and appeals before the EPO and nullity proceedings before the German Federal Patent Court and the German Supreme Court.


Wallinger Ricker Schlotter Tostmann was founded in 2007 following the merger of the leading automotive and mechanical engineering IP firm Wallinger and Partners, founded by Michael Wallinger in 1989, and the chemistry/pharmaceutical IP practice group of an international US-based law firm, led by Mathias Ricker – the firm’s European IP coordinator and co-founder of the Munich IP group.

Since 2007 Wallinger Ricker Schlotter Tostmann has continued to expand and now includes more than 25 lawyers and technical experts. The firm relies on experienced patent attorneys and attorneys at law to serve its clients, most of whom have significant IP experience, while many also have a strong industry background, having worked in R&D and management positions before joining Wallinger Ricker Schlotter Tostmann.

While some of these attorneys joined from different law firms, Wallinger Ricker Schlotter Tostmann has also established a successful patent attorney trainee programme that consistently adds home-grown talent to the team.

Practice areas and industries

Wallinger Ricker Schlotter Tostmann counsels clients on IP matters in all areas of technology. When necessary, teams of patent attorneys or technical experts with complementary technical experience or teams of both patent attorneys and attorneys at law are formed. Wallinger Ricker Schlotter Tostmann ensures that partners or experienced attorneys are actively involved in all aspects of each case to guarantee continuity and the highest quality. The firm’s focus is on providing strategic and comprehensive solutions in line with clients’ corporate goals instead of just ‘managing cases’.

Wallinger Ricker Schlotter Tostmann covers a broad range of technical and scientific fields, including:

  • mechanical engineering;
  • chemistry;
  • pharmaceuticals;
  • biotechnology;
  • electrical engineering, electronics and semiconductors;
  • information and communication technology;
  • physics;
  • green technologies;
  • new digital technologies;
  • automation and robotics;
  • medical engineering;
  • materials science.

At Wallinger Ricker Schlotter Tostmann, clients worldwide are supported by a strong network and engaged, quality-based, long-lasting cooperation with distinct partner firms in all relevant jurisdictions.

The firm’s client base spans the full range of small, medium-sized and large national and international companies, as well as start-ups and universities. This mixed client base is relevant to all technical areas served by Wallinger Ricker Schlotter Tostmann. The firm efficiently supports in-house counsel for some clients, while it essentially acts as the IP department for others (including a client with a patent portfolio of more than 500 active patent applications and more than 1,500 active trademarks).

For years, Wallinger Ricker Schlotter Tostmann has been ranked among the top IP law firms in Germany, including by the JUVE law firm ranking, which each year has placed it among the top 5% of all IP firms (over 400) in Germany, particularly in regard to contentious matters.

Get unlimited access to all IAM content