Composite panels

MB Digitalprint wins invalidity action on sealing technology against Winwall

MB Digitalprint may continue to manufacture and sell its water-repellent aluminium composite sheets in Germany. The Federal Patent Court in Munich has nullified the patent of competitor Winwall.

20 January 2021 by Konstanze Richter

MS Digitalprint In Munich, Pinsent Masons has won an invalidity action for MS Digitalprint over Dibond technology ©Aleksandr Kurganov/ADOBE STOCK

The Federal Patent Court in Munich has nullified the patent of MB Digitalprint’s competitor, Winwall. EP 2 562 002 protects a procedure whereby double-coated composite aluminium sheets are painted several times in different finishes, which seals them (case ID: 3 Ni 5/18). The sheets allow for customised wall design for all kinds of walls.

Furthermore, the process ensures the sheets are water-repellent. The sheets are therefore used in wet rooms such as bathrooms, or in outdoor areas such as building façades.

Case against MB Digitalprint postponed

Winwall, which is based near Munich, owns the patent. In 2017, managing director Thomas Schneider filed an infringement suit against shower cubical provider Schulte Home (case ID: 21 O 15601/17) and its supplier MB Digitalprint at the Regional Court Munich. The latter responded with a nullity suit at the Federal Patent Court. The court postponed the nullity dispute hearing, originally slated for March 2020, due to the COVID-19 pandemic.

Meanwhile, the Regional Court put the infringement suit on hold pending clarification of the patent’s validity. If the patent holder does not appeal the Federal Patent Court’s ruling, the proceedings will likely resume.

Marc Wachenhausen, LED patents

Marc Wachenhausen

Observers are not yet certain whether it will do so. However, it seems likely, given the wide spectrum of possible uses and resulting economic importance.

Same technology for glass and acrylic

Further European patents exist for a similar technology for use on glass and acrylic sheets. Another patent filed for plastic composite sheets is currently in the process of being granted by the European Patent Office.

The United States Patent and Trademark Office (USPTO) has already granted a corresponding patent for acrylic sheets. JUVE Patent understands that opponents have filed complaints against the patent for aluminium composite sheets, which is currently in the filing process.

Patent firm connections

Michael Schneider, MS Digitalprint

Michael Schneider

Initially, Frankfurt-based patent attorney firm Fuchs conducted the nullity suit for MB Digitalprint. Then, later, Pinsent Masons partner Michael Schneider brought in patent attorney Marc Wachenhausen of WBH Wachenhausen. The two often work together in patent disputes, for instance for Neovasc Tiara against Edward Lifesciences subsidiary CardiAQ over implants for mitral heart valves.

MB Digitalprint relied on Pinsent Masons for the infringement proceedings. The contact arose through Munich-based corporate law partner Ulrich Lohmann, who had already worked for the other defendant Schulte Home. Lohmann, who moved to Meister Rechtsanwälte in 2019, was a founding partner of Pinsent Masons’ first German office in Munich. He brought patent litigator Michael Schneider on board for the patent dispute.


Frequent acquaintances

Patent attorney firm Richter Gerbaulet Thielemann Hofmann represented patent holder Thomas Schneider in the nullity suit. Name partner Andreas Hofmann had already assisted in filing the patent at the EPO. His Hamburg colleague Hannes Gerbaulet frequently works with Taylor Wessing partner Gisbert Hohagen, bringing him in for the infringement proceedings.

Gisbert Hohagen, MS Digitalprint

Gisbert Hohagen

Initially, Sara Burghart worked on the case with him. However, in November 2018, she joined Sandoz as lead IP counsel.

For MB Digitalprint
WBH Wachenhausen (Munich): Marc Wachenhausen (patent attorney)
Pinsent Masons (Munich): Michael Schneider

For Thomas Schneider/Winwall
Richter Gerbaulet Thielemann Hofmann (Munich): Andreas Hofmann (patent attorney)
Taylor Wessing (Munich): Gisbert Hohagen, associate: Sebastian Kratzer

Federal Patent Court, 3rd Senate
Walter Schramm (presiding judge)