Hosea Haag advises national and international companies on all matters of patent law. He structures and handles both international litigation series and individual infringement actions. The technical areas 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 clerkship at the Berlin Court of Appeal. Here he was admitted to the bar in 2001 and in 2002/2003 he took up a Master's degree in International Studies in Intellectual Property Law in Exeter and Dresden. In Munich, he subsequently advised 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
LEADERS LEAGUE (2024) recognizes Hosea Haag as "highly recommended" in the field of patent litigation.
In the IP Report 2022, Who's Who Legal recognizes Hosea Haag as one of Germany's leading patent attorneys.
Juve regularly recognizes 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 recognizes Hosea Haag for his achievements:
"Hosea Haag: Absolute expert in the field of patent infringement."
"Hosea Haag hits the crucial point and presents it convincingly."
"Hosea Haag has a remarkable ability to work with technical and legal specialists to ensure that the case is optimally developed for the client."
"The AMPERSAND team is excellently positioned for dispute proceedings."
"Highly motivated team with the best expertise and a wealth of experience"
"Powerful team with good technical understanding in engineering."
"An extraordinarily homogeneous team that supports each other. Excellent communication skills, always focusing on the key points of the negotiation. Outstanding professional performance, always an exciting challenge in processes and negotiations." (Legal 500 2022)
"Hosea Haag is a grand seigneur of patent law. He has been involved in many of the patent disputes that have recently attracted media attention and is one of the first points of contact in Germany, especially for companies in the mobile communications sector. Few lawyers have the same impact in the courts. Always recommended!"
"Very competent in the execution."
"AMPERSAND distinguishes itself from other law firms above all through the extensive experience of its teams of attorneys in patent law matters. The attorneys at AMPERSAND work pragmatically and always with the client's success in mind."
"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 recognizes 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 Spezial Recht 2021, AMPERSAND is disproportionately frequently recommended by clients for patent law
Who's Who Legal 2021 recommends Hosea Haag for patents
Back in 2017, the WirtschaftsWoche jury found Hosea Haag to be one of the best patent lawyers in Germany
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