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UPC CFI 363/2023

Oct 13, 2023·EP3926698 +1 more · LIGHT EMITTING DIODE

Action number: ACT 579244/2023

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Case details
Status
Case Closed (Patent infringed)Set aside on appeal, Oct 2, 2025
Action
Infringement
Category
Main infringement action
Parties
Claimants
Representatives
Respondents
Representatives
Patents
Division
Dusseldorf LD
Judges
Technology
  • Electrical engineering
    Semiconductors
Language
German
First decided
Dec 4, 2023
Last decision
Oct 10, 2024
Appealed
How this compares
The court's record for this kind of case, counted in first-instance rulings. A figure in brackets is the number of rulings a rate rests on.
Infringement foundMedian days to first decision
All UPC53% (62/117)124
Dusseldorf LDLockedLocked
Judge Ronny ThomasLockedLocked
Judge Berenice ThomLockedLocked
Judge Mojca MlakarLockedLocked
Judge Alessandra SaniLockedLocked

At the UPC: Seoul Semiconductor Group (29 cases)·expert e-Commerce GmbH (14 cases)

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Related cases

This dispute contains 16 other proceedings

UPC CoA 380/2025·UPC CFI 823/2024·UPC CFI 824/2024·UPC CFI 677/2024·UPC CoA 762/2024 and 11 more

1 other defendants litigating the same or a related patent

UPC CFI 258/2025

Start a free trial to see how each one ended.

More cases: Dusseldorf LD·2023

Decisions
  • 2024-10-10
    Infringement ActionPublic

    Summary: The Local Division Düsseldorf found that expert klein GmbH and expert e-Commerce GmbH directly infringed EP 3 926 698 B1 (relating to lighting technology) owned by Seoul Viosys, dismissed the revocation counterclaim filed only by one defendant, and ordered the defendants to cease, render accounts, and pay damages, without requiring security for enforcement.

    Show the legal issues (5)
    • Direct patent infringement
    • Revocation counterclaim by individual defendant
    • Security for enforcement (R.118.8 RoP)
    • Joint defendants – independent proceedings
    • Financial standing of claimant as factor for security
  • 2024-07-12
    Public

    Summary: Procedural order on a request for court-provided simultaneous interpretation. The court held that where a party's representatives master one of the permitted languages of the local division, court-provided interpretation is not available merely because the claimant chose a different permitted language in which those representatives are less proficient. The party may arrange its own interpreter at its own cost.

    Show the legal issues (3)
    • Simultaneous interpretation (Rule 109.1 RoP)
    • Language of proceedings
    • Court-provided versus party-arranged interpretation
  • 2024-04-22
    Public

    Summary: The Düsseldorf Local Division granted Seoul Semiconductor's application to intervene as a third party (Streithilfe) on the claimant's side as a simple licensee, finding it has a legal interest in preventing revocation of the patent-in-suit.

    Show the legal issues (3)
    • Third-party intervention (Streithilfe)
    • Licensee's right to intervene
    • Legal interest in validity proceedings
  • 2023-12-04
    Infringement ActionPublic

    Summary: The Düsseldorf Local Division issued a procedural order under Rules 302.1 and 302.2 RoP concerning possible bifurcation or severance of issues in an infringement action by Seoul Viosys Co., Ltd. against expert e-Commerce GmbH and others, involving EP 3 926 698 B1 and EP 3 223 320 B1.

    Show the legal issues (1)
    • Bifurcation / severance (Rules 302.1, 302.2 RoP)
Documents
Document titleDatePublic
Cover sheet2025-10-29Not public
Application2025-10-29Not public
Exhibit2025-10-29Not public
Exhibit2025-10-29Not public
Receipt2025-10-29Not public
Communication2025-10-24Not public
Cover sheet2025-10-24Not public
Application2025-10-24Not public
Signature image2025-10-24Not public
Receipt2025-10-24Not public
Communication2025-10-10Not public
Cover sheet2025-10-10Not public
Application2025-10-10Not public
Receipt2025-10-10Not public
Outcome of the Order2025-07-18Not public
Erklärung2025-07-18Public
Confirmation2025-07-18Public
Receipt2025-07-03Not public
Schriftsatz2025-07-03Not public
Receipt2024-12-13Not public
Stellungnahme KfA2024-12-12Not public
Headnote-and-Keyword-Translated2024-10-11Not public
Headnote-and-Keywords2024-10-10Not public
DecisionOutcome2024-10-10Not public
Entscheidung2024-10-10Public
579244/2023_OH_DUS-LOC_UPC202409050930AM_S022024-09-06Not public
579244/2023_OH_DUS-LOC_UPC202409050930AM_S032024-09-06Not public
579244/2023_OH_DUS-LOC_UPC202409050930AM_S032024-09-06Not public
579244/2023_OH_DUS_LOC_UPC202409050930AM_S042024-09-06Not public
579244/2023_OH_DUS-LOC_UPC202409050930AM_S012024-09-06Not public
579244/2023_OH_DUS_LOC_UPC202409050930AM_S042024-09-06Not public
579244/2023_OH_DUS-LOC_UPC202409050930AM_S022024-09-06Not public
579244/2023_OH_DUS-LOC_UPC202409050930AM_S012024-09-06Not public
Anlage LL152024-09-02Not public
Anlage LL162024-09-02Not public
Klarstellung Anträge2024-09-02Not public
Schriftsatz2024-08-30Not public
Schriftsatz2024-08-30Not public
R. 104, 110 Abs. 1 VerfO – Abschluss des Zwischenverfahrens2024-08-26Public
interimProcedureClosure2024-08-26Not public
summons2024-07-18Not public
Wiederholter Upload der Ladung vom 21.05.20242024-07-18Public
Hearing-Dates2024-07-18Not public
writtenProcedureClosure2024-07-18Not public
Headnote-and-Keywords2024-07-12Not public
Outcome of the Order2024-07-12Not public
Anordnung R. 109 VerfO2024-07-12Public
Anordnung R. 109 VerfO2024-07-12Not public
Receipt2024-07-11Not public
Antrag nach R1092024-07-10Not public
Schriftsatz2024-07-09Not public
Schriftsatz2024-07-09Not public
Schriftsatz2024-07-09Not public
Outcome of the Order2024-07-04Not public
Zulassung weiterer Schriftsatz2024-07-04Public
Template-Order2024-07-04Not public
Outcome of the Order2024-07-01Not public
Zulassung weiterer Schriftsatz2024-07-01Public
Outcome of the Order2024-06-28Not public
Dokument zur Akte, Schließung Workflow2024-06-28Public
Receipt2024-06-28Not public
RoP 9 Einreichung2024-06-27Not public
Triplik2024-06-27Not public
Receipt2024-06-26Not public
Receipt2024-06-26Not public
Schriftsatz2024-06-26Not public
Schriftsatz2024-06-26Not public
Outcome of the Order2024-06-18Not public
Zulassung eines weiteren Schriftsatzes2024-06-18Public
Receipt2024-06-14Not public
Antrag nach RoP 362024-06-14Not public
Acknowledgement-of-lodging2024-06-05Not public
Acknowledgement-of-lodging2024-05-28Not public
Schriftsatz2024-05-28Not public
Outcome of the Order2024-05-28Not public
Auflagenanordnung2024-05-28Public
Outcome of the Order2024-05-28Not public
Auflagenanordnung2024-05-28Public
Outcome of the Order2024-05-28Not public
Auflagenanordnung2024-05-28Public
Receipt2024-05-27Not public
Receipt2024-05-27Not public
Receipt2024-05-27Not public
Schriftsatz2024-05-27Not public
D102024-05-27Not public
SChriftsatz2024-05-27Not public
Schriftsatz2024-05-27Not public
Schriftsatz2024-05-24Not public
Hearing-Dates2024-05-21Not public
Ladung zur mündlichen Verhandlung, R. 108 VerfO2024-05-21Public
Headnote-and-Keywords2024-04-22Not public
Zulassung der Streithilfe2024-04-22Public
Zulassung Streitbeitritt2024-04-22Not public
Acknowledgement-of-lodging2024-03-25Not public
Acknowledgement-of-lodging2024-03-25Not public
Anlage LL132024-03-25Not public
Anlage LL142024-03-25Not public
Anlage LL14a2024-03-25Not public
Schriftsatz Replik2024-03-25Not public
Anlage LL13a2024-03-25Not public
Anlage LL142024-03-25Not public
Anlage LL13a2024-03-25Not public
Schriftsatz Replik2024-03-25Not public
Anlage LL14a2024-03-25Not public
Anlage LL132024-03-25Not public
Weitere Stellungnahme Streitbeitritt2024-02-29Not public
Hearing-Dates2024-02-23Not public
Bestimmung des Termins zur mündlichen Verhandlung2024-02-23Public
Möglichkeit der Stellungnahme zum Umfang des Streithilfeantrages2024-02-19Not public
Stellungnahme Streitbeitritt2024-02-14Not public
Schriftsatz13.2.2024-02-13Not public
Schriftsatz13.2.2024-02-13Not public
R. 28.1 VerfO - Gelegenheit zur Stellungnahme2024-02-12Not public
Hearing-Dates2024-02-12Not public
Anordnung Vorgehen Art. 33 Abs. 3 lit. a EPGÜ2024-01-31Not public
Anhörung R. 314 RoP2024-01-31Not public
Template-Order2024-01-31Not public
Stellungnahme Art 332024-01-30Not public
Schriftsatz30.1.2024-01-30Not public
Schriftsatz30.1.2024-01-30Not public
Acknowledgement-of-lodging2024-01-25Not public
Formal-checks_Notification-of-positive-outcome2024-01-25Not public
Formal-checks_Notification-of-positive-outcome2024-01-25Not public
Möglichkeit der Stellungnahme R. 37.22024-01-24Not public
Schriftsatz23.1.2024-01-23Not public
B102024-01-23Not public
Acknowledgement-of-lodging2024-01-23Not public
Schriftsatz23.1.2024-01-23Not public
B102024-01-23Not public
Outcome of the Order2024-01-20Not public
Zurückweisung Fristverlängerungsantrag2024-01-20Not public
Stellungnahme zu Fristverlängerungsbitte2024-01-19Not public
Formal-checks_Request-for-correction2024-01-17Not public
Stellungnahme Fristverlängerungsantrag2024-01-16Not public
Receipt2024-01-16Not public
Fristverlängerungsbitte2024-01-16Not public
Acknowledgement-of-lodging2024-01-15Not public
Fristverlängerungsbitte2024-01-15Not public
Outcome of the Order2023-12-29Not public
R. 9 VerfO i.V.m. R. 4.2, R. 313 ff. VerfO2023-12-29Not public
Receipt2023-12-29Not public
Anlage SH 12023-12-28Not public
Streitbeitritt Seoul Semiconductor2023-12-28Not public
Antrag nach RoP 92023-12-28Not public
Begründung Ersatzeinreichung Streitbeitritt2023-12-28Not public
Anlage SH 1a2023-12-28Not public
Empfangsquittung2023-12-28Not public
Outcome of the Order2023-12-11Not public
Closing workflow2023-12-11Not public
R. 302 RoP Order2023-12-04Not public
Schriftsatz2023-12-04Not public
Schriftsatz29.11.2023-12-04Not public
Schriftsatz2023-12-04Not public
Opportunity to comment2023-12-01Not public
Opportunity to comment2023-12-01Not public
Stellungnahme weitere Verfahren2023-11-30Not public
Stellungnahme Verfahrenstrennung Streitwert2023-11-30Not public
R. 302.1 RoP - Opportunity to comment2023-11-24Not public
Opportunity to comment2023-11-23Not public
Receipt2023-11-23Not public
Schriftsatz 23.11.2023-11-23Not public
Schriftsatz 23.11.2023-11-23Not public
Acknowledgement of access to case2023-11-23Not public
Acknowledgement of access to case2023-11-23Not public
Notification Of Service2023-10-23Not public
Notification of service B2_expert klein2023-10-23Not public
Notification Of Service2023-10-23Not public
Notification of service B1_expert e_commerce2023-10-23Not public
epoUploadDocumentsWorkflow2023-10-20Not public
epoUploadDocumentsWorkflow2023-10-20Not public
Document from EPO2023-10-19Not public
Document from EPO2023-10-19Not public
Letter for Service2023-10-16Not public
Letter for Service2023-10-16Not public
Panel-Appointment2023-10-16Not public
EPO-Request-for-case-pending2023-10-16Not public
Receipt2023-10-16Not public
Formal-checks_Notification-of-positive-outcome2023-10-16Not public
Anlage LL 092023-10-15Not public
Anlage LL 042023-10-15Not public
Anlage LL 082023-10-15Not public
Zahlungsnachweis Gerichtsgebühr2023-10-15Not public
Anlage LL 022023-10-15Not public
Anlage LL 06a2023-10-15Not public
Anlage LL 102023-10-15Not public
Anlage LL 012023-10-15Not public
Anlage LL 112023-10-15Not public
Anlage LL 072023-10-15Not public
Anlage LL 062023-10-15Not public
Anlage LL 122023-10-15Not public
Anlage LL 052023-10-15Not public
Anlage LL 08a2023-10-15Not public
Anlage LL 032023-10-15Not public
Mitteilung der geänderten Zustellungsanschrift2023-10-15Not public
Seoul_Viosys_v_Expert_Verletzungsklage2023-10-15Not public
Formal-checks_Request-for-correction2023-10-13Not public
Acknowledgement-of-lodging2023-10-13Not public
Anlage LL 022023-10-13Not public
Anlage LL 122023-10-13Not public
Seoul_Viosys_v_Expert_Verletzungsklage2023-10-13Not public
Anlage LL 082023-10-13Not public
Anlage LL 062023-10-13Not public
Anlage LL 072023-10-13Not public
Anlage LL 042023-10-13Not public
Anlage LL 112023-10-13Not public
Anlage LL 092023-10-13Not public
Anlage LL 08a2023-10-13Not public
Anlage LL 06a2023-10-13Not public
Anlage LL 032023-10-13Not public
Anlage LL 012023-10-13Not public
Anlage LL 052023-10-13Not public
Anlage LL 102023-10-13Not public
Zahlungsnachweis Gerichtsgebühr2023-10-13Not public
Coverage: Partial.Reasoning extracted with partial coverage — some sections may be incomplete.
Plain-English summary

Seoul Viosys Co., Ltd. sued expert klein GmbH and expert e-Commerce GmbH before the Düsseldorf Local Division for direct infringement of EP 3 926 698 B1, relating to light-emitting diode technology. The court found direct infringement, ordered injunction, account of profits, and damages. Only expert e-Commerce GmbH filed a revocation counterclaim, which was dismissed; expert klein GmbH's failure to join the counterclaim formally precluded it from raising validity arguments in its own proceedings. No security for enforcement was required.

Accepted arguments
What the court agreed with — by party.

  • Direct infringement of EP 3 926 698 B1 by both defendants in the field of LED/lighting technology

    ClaimantLegal basis: Art. 25(a) UPCA

    Note: Düsseldorf Local Division found both expert klein GmbH and expert e-Commerce GmbH directly infringed the patent; defendants were ordered to cease, render accounts, and pay damages.

  • No security for enforcement is required given the facts of the case

    ClaimantLegal basis: R. 118.8 RoP

    Note: Court carried out a case-by-case balancing of claimant's interest in effective enforcement versus risk of unenforceable compensation if judgment is later overturned, and found no security warranted.

Rejected arguments
What the court did not agree with — and why.

  • Revocation counterclaim filed only by expert e-Commerce GmbH (defendant 2)

    RespondentLegal basis: R. 25.1 RoP

    Reason: Dismissed; defendant 1 (expert klein GmbH) did not join the counterclaim, so validity arguments were formally excluded from its own proceedings; patent held valid in the counterclaim.

Key legal principles
Doctrines and rules cited in the reasoning.
Each defendant in a multi-defendant action conducts its own proceedings independently; one defendant's procedural acts do not benefit or prejudice anotherRevocation counterclaim must be filed by each defendant individually; a defendant that declines to file a counterclaim is formally precluded from raising invalidity in its own proceedingsSecurity for enforcement is a case-by-case balancing exercise under R. 118.8 RoP — relevant factors include claimant's financial position and risk that compensation could not be enforcedIsolated revocation counterclaim by single defendant

Browse other cases on this principle.