Since more than 70 years advising in the laws of intellectual property.

The patent law firm Roche, von Westernhagen & Ehresmann (formerly named Ostriga, Sonnet, Wirths & Roche) was established in 1950 in Wuppertal. Wuppertal is an industrial city of approximately 350.000 inhabitants and is located in the industrial heart land of Western Germany within a 30 minutes ride to the neighboring cities of Cologne, Düsseldorf, Essen, Bochum, Dortmund, Remscheid and Solingen.

The main technical and legal focus at that time was in the field of tools, cutters, blades and textile and metal-working machinery. This relates to the history of the city of Wuppertal and its districts of Elberfeld and Barmen that were famous for their textile industries, including weaving and dyeing.

The neighborhood cities of Remscheid and Solingen are well known for the manufacturing of tools and all fields of industry relating to cutting.

With the change from traditional industries to modern high-tech industries and products the technical and legal focus has changed. Nowadays we advise our clients in all technical and legal fields of intellectual property.

Our patent law firm advises and represents domestic and foreign clients in German, English and French.

The law firm is headed by its three partners Dipl.-Phys. Florian Roche, LL.M., Dipl.-Ing. Tilo von Westernhagen and Dipl.-Geophys. Lars Ehresmann.

Our staff currently includes 14 members.

Within the last 70 years a reliable professional international network of patent law firms all over the world has been established.


History of the law firm

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Foundation of the patent law firm by patent attorney Dipl.-Ing. Helmut Sonnet.

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The partnership was founded by patent attorney Dipl.-Ing. Harald Ostriga together with Patent attorney Dipl.-Ing. Helmut Sonnet. The patent law firm is continuously gaining numerous middle-sized companies as new clients.

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The son of the founder of the law firm, patent attorney Dipl.-Ing. Bernd Sonnet joins the partnership who at the point of time of his accreditation was the youngest patent attorney in the Federal Republic of Germany.

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Dipl.-Phys. Florian Roche is beginning his traineeship, trained by patent attorney Dipl.-Ing. Bernd Sonnet and patent attorney Dipl.-Ing. Harald Ostriga.

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Florian Roche is joining the firm as a partner. The name of the law firm changes from Ostriga, Sonnet & Wirths into Ostriga, Sonnet, Wirths & Roche.

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A change in generation takes place: Patent Attorney Dipl.-Ing. Tilo von Westernhagen joins the firm as a partner and Patent attorney Dipl.-Ing. Harald Ostriga and patent attorney Dipl.-Ing. Bernd Sonnet leave the company.

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Change in address: The company moves – within the same building – from Stresemannstr. 6-8, where it has been seated since 1950, to Friedrich-Engels-Allee 430-432. The modern office building with an area of more than 1.000 square meters offers excellent possibilities for the company’s development.

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Patent Attorney Dipl.-Geophys. Lars Ehresmann joins the company as a partner. Change of name from Ostriga, Sonnet, Wirths & Roche into Roche, von Westernhagen & Ehresmann.

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Relocation of the law firm within Wuppertal. The new offices in the heart of Elberfeld offer a significantly improved working environment and make traveling easier for our customers and employees.

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