AMPERSAND Partnerschaft von Rechtsanwälten mbB. > Munich, Germany > Firm Profile

AMPERSAND Partnerschaft von Rechtsanwälten mbB.
80538 MUNICH

Intellectual property > Patent litigation Tier 5

Munich-based AMPERSAND Partnerschaft von Rechtsanwälten mbB's patent litigation practice was particularly visible in telecoms disputes in 2020, especially in proceedings with patent users. The group is well versed in a wide range of technologies and this versatility also attracts numerous large and medium-sized companies. Practice head Hosea Haag and Philipp Neels are the main contacts.

Practice head(s):

Other key lawyers:


‘The Ampersand team is excellently positioned for litigation.’

‘Hosea Haag’s many years of litigation experience combined with the commitment and creativity of Jonathan Konietz is unbeatable. Recommended at any time. ‘

‘Highly motivated team with the best expertise and a wealth of experience’

‘Hosea Haag: Absolute expert in the field of patent infringement.’

Agnes Lauer: Highly motivated and excellent legal knowledge.

‘Powerful team with good technical understanding in engineering.’

‘Hosea Haag hits the nail on the head and presents it convincingly.’

‘Hosea Haag has the remarkable ability to work alongside technical and legal specialists to ensure the case is handled in the best way possible for the client.’

Key clients

Accord Healthcare Ltd.


Axell Wireless

BlueID GmbH

Cobham plc

Conversant Wireless Licensing S.à.r.l.

DAF Truck N.V.

DT Swiss AG

Human Care Nederland B.V.

IDnow GmbH

InstrAction Siltectra uVm

INTAS Pharmaceuticals





Quiss Qualitäts-Inspektionssysteme und Service GmbH

Schülke & Mayr GmbH

Tautropfen Naturkosmetik

Uniloc Deutschland GmbH

Valutis GmbH

Wonderland Nurserygoods Co. Ltd.

WSOU Investments LLC

Work highlights

  • Representing WSOU Investments LLC in over 20 patent infringement proceedings in Germany.
  • Representing INVTE SP in seven infringement proceedings and three injunction proceedings relating to FRAND and SEP patents in the field of telecoms.
  • Representing Quiss Qualitäts-Inspektionssysteme und Service GmbH in three lawsuits against competitors.

AMPERSAND’s patent litigation team consists of two partners and two associates. Munich / Germany is the sole office of AMPERSAND.

If it is patent litigation, AMPERSAND does it. We have extensive experience in SEP litigation but have also a substantial industry client base. We worked for medium size companies as well as multinationals. Telecommunications or pharmaceuticals, mechanical engineering or electronics – we do the lot.

All partners in our patent litigation team have seen 200+ court cases in patent litigation. We are active in all German patent litigation courts – with the obvious focus on Duesseldorf, Mannheim and Munich. If a case is preliminarily technical but is handled as a design case or an unfair competition case or the like, we do it. For antitrust issues we involve boutique law firms with a focus on that. We always work with external patent attorneys that we pick in accordance with client’s needs.

Patent litigation Hosea (0)89 / 24 29 55 0
Patent litigation Philipp (0)89 / 24 29 55 0
German Association for the Protection of Industrial Property and Copyright Law (GRUR)
AIPPI (Association for the Protection of Intellectual Property)
LES (Licensing Executives Society)
ICC Commission on International Arbitration