Home › PTAB Cases › IPR2026-00015

Resonac Hard Disk Corporation et al. vs. MR TECHNOLOGIES GMBH

Explore the PTAB proceeding IPR2026-00015 filed by Resonac Hard Disk Corporation et al. on 2025-10-08. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2026-00015

Filing Date

2025-10-08

Accorded Filing Date

2025-10-08

Institution Decision Date

2026-02-03

Last Modified Date

2026-03-09

Proceeding Type

IPR

Termination Date

2026-02-03

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Resonac Hard Disk Corporation et al.

Represented By

Bregman, Dionet al

Patent Owner / Respondent

MR TECHNOLOGIES GMBH

Represented By

Milkey, Jameset al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 1700 - Chemical & Materials Engineering

Patent Information

1 Patent Involved

Respondent Application Number 15925749

Respondent Patent Number 11138997

External Links

Espacenet

Google Patents

Respondent Inventor Dieter Suess

Respondent Tech Center TC 1700 - Chemical & Materials Engineering

Address and Attorney/Agent Information

1 Registered Practitioner

Power of Attorney & Correspondence

Firm / Entity Name Gergely T. Zimanyi

Customer Number 143793

Address 11 Dartmouth Drive, Berkeley, CA, 94705, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
45754	Gergely Zimanyi	530-400-3936

Proceeding Documents

Notice: refund approved NOTICE

2026-03-09 FILING PARTY: BOARD

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Petitioners' Request for Refund of Post-Institution Fees OTHER

2026-03-02 FILING PARTY: PETITIONER

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Director Discretionary Decision: Deny RESPONSE

2026-02-03 FILING PARTY: BOARD

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1037

Ex-1037 Resonac v. MRT - Sotera Stipulation Letter (997 Patent_ IPR2026-00015) Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1041

Ex-1041 USPTO Assignment Records - combined Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1044

Ex-1044 Docket Entries for Resonac Action Exhibit

2026-01-08 FILING PARTY: PETITIONER

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997 IPR - Petitioners' Updated Mandatory Notices NOTICE

2026-01-08 FILING PARTY: PETITIONER

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1047

Ex-1047 Median Time to Trial - Judge James V Selna (Toshiba Action) Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1046

Ex-1046 Median Time to Trial - Judge Patrick Joseph Schiltz (Seagate Action) Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1045

Ex-1045 Patent Owner Motion to Dismiss or Transfer in Resonac DJ Action Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1038

Ex-1038 Resonac v. MRT - Shimizu Declaration (IPR2026-00015) - Executed Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1043

Ex-1043 Docket Entries for Toshiba Action Exhibit

2026-01-08 FILING PARTY: PETITIONER

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997 IPR - Petitioners' Opposition to PO's Discretionary Denial Brief RESPONSE

2026-01-08 FILING PARTY: PETITIONER

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1048

Ex-1048 Median Time to Trial - NDCal (Resonac DJ Action) Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1039

Ex-1039 Judge Selna’s Grant Rate re Motions to Stay pending PTAB proceedings Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1040

Ex-1040 NDCA's Grant Rate re Motions to Stay pending PTAB proceedings Exhibit

2026-01-08 FILING PARTY: PETITIONER

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1042

Ex-1042 Lex Machina statistics comparing final written decisions Exhibit

2026-01-08 FILING PARTY: PETITIONER

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2022

Ex. 2022 - U.S. 7,550,210 (Berger) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2021

Ex. 2021 - Complaint, Resonac Hard Disk Corporation and Resonac Am., Inc., No. 25-cv-8631, Dkt. 1 (N.D. Cal. Oct. 9, 2025) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2023

Ex. 2023- Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Trial Tr. Day 7 (Volume 1) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2013

Ex. 2013 - Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Trial Tr. Day 6 Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2020

Ex. 2020 - Defendants’ Notice of Motion, Motion to Stay, and Memorandum in Support Thereof in MR Technologies GmbH v. Toshiba America Electronic Components, Inc. et al., No. 25-cv-00786, Dkt. 31 (C.D. Cal. Oct. 31, 2025) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2017

Ex. 2017 - Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Trial Tr. Day 5 (Volume 1) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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PATENT OWNER’S PRELIMINARY RESPONSE POPR

2026-01-08 FILING PARTY: PATENT OWNER

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2016

Ex. 2016 - Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Trial Tr. Day 3 (Volume 2) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2015

Ex. 2015 - Joint Exhibit 2057 Western Digital’s Recent Developments in Magnetic Recording Media presentation by Kumar Srinivasan dated March 19, 2019 Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2014

Ex. 2014 - Joint Exhibit 2030 Western Digital’s Recent Developments in Magnetic Recording Media presentation by Kumar Srinivasan dated April 6, 2018 Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2011

Ex. 2011 - Declaration of Mark Re in Support of MR Tech’s Opposition to WD’s Motion for Summary Judgment of Invalidity, MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Dkt. 270-33 (filed February 26, 2024) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2019

Ex. 2019 - Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Trial Tr. Day 7 (Volume 2) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2012

Ex. 2012 - Complaint, MR Technologies GmbH v. Toshiba America Electronic Components, Inc. et al., No. 25-cv-00786, Dkt. 1 (C.D. Cal. Apr. 15, 2025) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2018

Ex. 2018 - C. Papusoi et al., Measurements of Gilbert Damping Parameter α for CoPt-Based and CoFe-Based Films for Magnetic Recording Applications, 51 J. Phys. D: Appl. Phys. 325002 (2018) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2010

Ex. 2010 - Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599, Trial Tr. Day 3 (Volume 1) Exhibit

2026-01-08 FILING PARTY: PATENT OWNER

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2003

Ex. 2003 - U.S. Patent No. 12,020,734 (“the ’734 patent”) Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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2004

Ex. 2004 - Verdict Form dated July 26, 2024 in MR Technologies GmbH v. Western Digital Technologies, Inc., No. 22-cv-01599 (C.D. Cal. Aug. 26, 2022) Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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2007

Ex. 2007 - Excerpts from MR Technologies GmbH v. Western Digital Technologies, Inc , No. 22-cv-01599, July 23, 2024 Trial Tr. Vol. II at 72:11-24 Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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2002

2002 - U.S. Patent No. 11,138,997 (“the ’997 patent”) Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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2005

Ex. 2005 - Proposed Rules, Federal Register Vol. 90, No. 99 (Oct. 17, 2025), accessible at: https://www.govinfo.gov/content/pkg/FR-2025-10-17/pdf/2025-19580 Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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2006

Ex. 2006 - Showa Denko Was Reborn as Resonac on Jan. 1, 2023, https://www.resonac.com/corporate/name-change.html (last visited December 6, 2025) Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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PATENT OWNER’S REQUEST FOR DISCRETIONARY DENIAL OF INSTITUTION RESPONSE

2025-12-08 FILING PARTY: PATENT OWNER

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2001

Ex. 2001 - U.S. Patent No. 9,928,864 (“the ’864 patent”) Exhibit

2025-12-08 FILING PARTY: PATENT OWNER

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Notice: Mandatory Notice NOTICE

2025-10-31 FILING PARTY: PATENT OWNER

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Notice: Power of Attorney NOTICE

2025-10-31 FILING PARTY: PATENT OWNER

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Notice: NOTICE OF FILING DATE ACCORDED TO PETITION AND TIME FOR FILING PATENT OWNER PRELIMINARY RESPONSE NOTICE

2025-10-10 FILING PARTY: BOARD

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