Hosea Haag

+49 (0)89 / 242955-23

HAAG@AMPERSAND.DE

Hosea Haag advises national and international companies on all matters of patent law. He structures and manages both international litigation series and individual infringement actions. The technical fields he covers include telecommunications, electronics, mechanical engineering and medical devices.

Hosea Haag studied law at the Friedrich Alexander University in Erlangen and at the University of Nottingham (UK). He taught there after his state examination before completing his legal traineeship at the Berlin Court of Appeal. Here he was admitted to the bar in 2001, before taking up a Master’s degree in International Studies in Intellectual Property Law in Exeter and Dresden in 2002/2003. In Munich, he subsequently advised at renowned patent law firms, most recently as Head of Patent Litigation at a major international law firm. In 2012, he founded AMPERSAND with Alexandra Heÿn, among others.

Law and Practice Germany – Chambers Patent Litigation 2022 Global Practice Guides

Law and Practice Germany – Chambers Patent Litigation 2021 Global Practice Guides

Law and Practice Germany – Chambers Patent Litigation 2020 Global Practice Guides

Law and Practice Germany – Chambers Patent Litigation 2019 Global Practice Guides

Who’s Who Legal IP Report 2022: One of Germany’s leading practitioners in the field Patents

Juve regularly recognises Hosea Haag as a recommended lawyer in patent law:

“many years of litigation experience and a large number of mobile communications suits. AMPERSAND primarily represents NPEs, …. Hosea Haag enjoys an excellent reputation for such cases, which he conducts for these loyal clients alone or with a very small team” (Juve 2021)

Litigation for NPEs regarding mobile communications, including SEP and FRAND claims. (Juve 2020, 2021)

“very good on the plaintiff side”, competitor (Juve 2020)

“very experienced for particularly thorny patent issues”, “very smart”, competitors (Juve 2021)

Legal 500 regularly awards Hosea Haag for his achievements:

“Hosea Haag: Absolute expert in the field of patent infringement.”

“Hosea Haag hits the crucial point and delivers it convincingly.”

“Hosea Haag has a remarkable gift for working with technical and legal specialists to ensure that the case is brought up in the best possible way for the client.”

“The team at AMPERSAND is excellently positioned for litigation.”

“Highly motivated team with best expertise and great wealth of experience”.

“Powerful team with good technical understanding in engineering.”

“An extraordinarily homogeneous team that supports each other mutually. Excellent communication skills, always putting the essential points in the focus of the negotiation. Professional excellence, always an exciting challenge in litigation and negotiation.” (Legal 500 2022)

“Hosea Haag is a grand seigneur of patent law. He has been involved in many of the recent high-profile patent litigation cases and is one of the first points of contact in Germany, especially for companies in the mobile phone sector. Few lawyers make the same impact in the courts. Always recommended!”

“Very competent in execution.”

“AMPERSAND is distinguished from other law firms above all by the great experience of its teams of lawyers in patent law matters. AMPERSAND’s lawyers work pragmatically and are always oriented towards the client’s success.”

“scores with a closely partner-led advisory approach and broad technical expertise.” (Legal 500 2021)

Chambers and Partners writes:

“Hosea Haag acts for clients in the telecommunications sector, particularly in patent infringement and enforcement disputes” (Chambers 2021)

IAM Patent:

“At AMPERSAND, the technically versatile Hosea Haag maintains a busy patent litigation and commercial contracts practice underpinned by razor-sharp business insight.” (IAM Patent 1000, 2021)

IP Stars regularly recognises Hosea Haag as an IP Star

Best Lawyers in cooperation with Handelsblatt regularly names Hosea Haag as Best Lawyer for Patent Infringement

According to FOCUS Special Law 2021, AMPERSAND is disproportionately often recommended by clients for patent law

Who’s Who Legal 2021 recommends Hosea Haag for patents

Already in 2017, the jury of WirtschaftsWoche found Hosea Haag to be one of the best patent lawyers in Germany