Samsung Electronics Co. Ltd. et al. vs. Maxell, Ltd.

Explore the PTAB proceeding IPR2025-01315 filed by Samsung Electronics Co. Ltd. et al. on 2025-08-29. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01315

Filing Date

2025-08-29

Accorded Filing Date

2025-08-29

Institution Decision Date

2026-02-10

Last Modified Date

2026-08-04

Proceeding Type

IPR

Termination Date

—

Trial Status

Trial Instituted

Parties & Counsel

Petitioner

Samsung Electronics Co. Ltd. et al.

Represented By

Bifano, Larissaet al

Patent Owner / Respondent

Maxell, Ltd.

Represented By

Pluta, Robertet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 2600 - Communications

Patent Information

1 Patent Involved

Respondent Application Number 12621304

Respondent Patent Number 8471950

External Links

Espacenet

Google Patents

Respondent Inventor Junji KAMIMURA et al

Respondent Tech Center TC 2600 - Communications

Address and Attorney/Agent Information

147 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Kilpatrick Townsend & Stockton LLP - West Coast - Mailstop: IP Docketing - 22

Customer Number 20350

Address 1100 Peachtree Street, Suite 2800, Atlanta, GA, 30309, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
29476	John Pratt	404-815-6500
31741	Theodore Brown Iii	650-326-2400
31814	Charles Calkins	336-607-7300
31836	Paul Haughey	415-273-4787
33160	Steven Borgman	281-809-4100
33452	Dean Russell	404-815-6500
35687	Susan Spaeth	650-324-6335
36974	Roger Wylie	206-516-3092
37234	William Shaffer	650-326-2400
37330	Eugenia Garrett-Wackowski	925-472-5000
37911	Steven Phillips	919-420-1700
38464	Darin Gibby	303-571-4000
39381	Joseph Snyder	415-472-5000
39389	Mitchell Stockwell	404-815-6500
39751	Rebecca Peterson	925-472-5000
40253	J Schiff	650-324-6340
40339	Brenda Holmes	404-815-6500
40456	Patrick Jewik	415-576-0200
40852	Michael Turton	404-607-0770
41303	Andrew Serafini	206-626-7769
41772	John Gardner	336-607-7300
42985	Michael Pavento	404-815-6213
43336	Sujit Kotwal	650-324-6365
43791	Tina Mckeon	404-815-6103
44005	John Zigmant	415-576-0200
44807	Kristin Doyle	404-815-6389
44879	Jean Lockyer	415-576-0200
45865	Vaibhav Kadaba	404-815-6500
46103	Eric Gayan	919-420-1732
46694	Lizette Fernandez	404-541-6694
46758	Tywanda Harris	404-745-2597
47040	Cynthia Rothschild	336-607-7300
47384	John Alemanni	929-420-1724
47400	Nena Bains	650-326-2400
47651	Matthew Hinsch	415-576-0200
47719	Justin Krieger	303-405-1486
47981	Timothy Sullivan	281-809-4108
49088	Francois Vandervegt	703-770-7571
50866	Roger Hylton	650-326-2400
51082	Matias Ferrario	336-607-7300
51095	Babak Kusha	925-472-5006
51110	Nathan Maki	206-626-7784
51345	Megan Mccoy	415-273-4757
51361	Ruthleen Uy	858-350-3870
51588	Cathy Cretsinger	415-576-0200
52130	Elena Polovnikova	404-815-6500
52145	David Raczkowski	415-576-0200
53825	Marina Zalevsky	310-966-4916
53994	Jennifer Blackburn	404-815-6500
54111	Chuan Gao	415-576-0200
54236	Russell Korn	404-815-6500
54682	Kathryn Wade	404-815-6500
54713	Michael Bertelson	--
55246	Joe Hao	301-230-9048
55589	Tiffany Thomas	858-350-6151
56400	Craig Largent	650-326-2400
56827	Troy Petersen	202-481-9933
57021	James Bergstrom	303-571-4000
57203	Carl Sanders	919-420-1728
57535	Kelvin Catmull	650-326-2400
58011	David Holloway	202-815-6500
58180	Jason Gardner	919-420-1727
58961	Renae Wainwright	404-815-6500
59500	Charles Cheng	650-462-5334
60229	Melissa Harwood	206-626-7783
60687	Alton Absher Iii	336-607-7300
60728	Rodney Rothwell Jr.	202-481-9930
60804	Yifan Mao	650-324-6311
61076	Joshua Lee	404-815-6500
61226	David Reed	404-745-2548
61345	Charles Gray	303-571-4000
61751	Daniel Sherwinter	303-607-3217
62078	Mark Mcmaster	206-224-2961
62245	Michael Morlock	404-815-6003
62647	Jesse Bennett	206-224-2856
62876	Matthew Crookston	303-571-4000
63789	Megan Bussey	212-775-8706
64190	Karam Saab	303-571-4000
64200	Aaron Swehla	303-571-4000
64668	Kimberlynn Davis	404-541-6815
64883	Neslihan Doran-Civan	415-273-4845
65567	Jennifer Giordano-Coltart	919-420-1716
65741	Kanchan Sripathy	650-326-2400
65990	Clark Weight	202-344-8300
66184	Kenneth Shurtz	650-326-2400
67590	Justin Eurek	650-326-2400
68161	Nicoletta Kennedy	609-346-1095
68757	Allison Dobson	336-607-7405
69272	Valerie Moore	281-809-4113
69319	Patrick Njeim	206-467-9600
69493	Richard Christiansen	858-350-3863
69943	Tyler Mcallister	206-224-2865
69963	Jonathan Harris	859-226-2309
70195	Anthony Guebert	404-815-6015
70333	Vanessa Bell	925-472-5008
70593	Eben Allen	206-516-3085
70993	Jeffrey Marlink	206-224-2852
71345	Zachary Kelton	919-420-1720
71835	Brett Mellor	303-607-3211
72265	Christopher Thomas	202-481-9950
72614	Cynthia Rickett	206-516-3096
72641	Torrey Spink	303-607-3207
72701	Yanping Parks	919-420-1811
72748	Kristan Wagner	404-815-6064
72776	Arush Gadkar	202-481-9932
73531	Patrick Miller	415-273-8311
73982	Zhengzheng Yao	415-273-4395
74185	Courtney Dabbiere	404-307-4834
74482	Christopher Roberge	415-576-0200
74538	Alexa Hunter	303-607-3218
75397	William Sparkman	404-532-6880
75505	Maha Khalaj	678-420-9310
75611	Ishir Mehta	404-607-9991
76190	Jun Ma	314-341-0988
76327	Chrystal Tomblyn	336-607-7442
76681	Jabeen Ahmad	919-420-1735
77105	Melissa Love	404-815-6034
77528	Poh Teng	925-817-3133
77910	Albert Chen	646-601-7671
77956	Lin Yan	415-273-4303
78116	Jessica Garcia	650-462-5322
78360	Jacob Plovanic	206-224-2869
78604	Jacob Hermann	415-273-4353
79039	Jacob Guttenberg	303-223-1278
79105	Quinten Campbell	303-607-3242
79115	Benjamin Black	206-224-2858
79266	Michael Figg	404-815-6037
79510	John Baumgartner	415-576-0200
79561	Jeffrey Lassen	303-607-3253
79676	Wyatt Reid	404-745-2417
800031	Yang Cao	202-481-9944
80440	Justin Misleh	202-481-9959
80449	Ruming Wen	404-532-6876
80728	Jordan Glassman	919-420-1743
80894	Kathryn Apsens	415-273-4721
81153	Ahmad Khoshnevis	503-702-0078
81183	Alexandra Farquhar	202-508-5800
81201	Eric Henderson	336-607-7398
81226	Grant Wanderscheid	650-324-6367
81769	Vaibhav Sharma	212-775-8746
81801	Aviya Zarur	310-777-3746
81853	Rolando Rengifo	470-351-7836
81997	Jennifer Patritti Cram	281-809-4108
82167	Megan Saia	352-327-2690
82309	Alexandra Nelson	336-607-7317
82677	Raquel De Castro	479-466-3991
L1392	Chetan Mutha	202-508-5800

Proceeding Documents

1036

Ex1036_Supplemental Declaration Schonfeld 950 Exhibit

2026-08-04 FILING PARTY: PETITIONER

Download

Petitioner's Reply to PO Response REPLYTOOPP

2026-08-04 FILING PARTY: PETITIONER

Download

1035

Ex1035_TurkTranscript Exhibit

2026-08-04 FILING PARTY: PETITIONER

Download

Panel Change Order ORDER

2026-06-11 FILING PARTY: BOARD

Download

PETITIONERS’ NOTICE OF CROSS-EXAMINATION OF DR. TURK OTHER

2026-06-05 FILING PARTY: PETITIONER

Download

Samsung Electronics Co. Ltd. et al. vs. Maxell, Ltd.

Proceeding Overview

Parties & Counsel

Petitioner

Samsung Electronics Co. Ltd. et al.

Represented By

Patent Owner / Respondent

Maxell, Ltd.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Ex1036_Supplemental Declaration Schonfeld 950 Exhibit

Petitioner's Reply to PO Response REPLYTOOPP

Ex1035_TurkTranscript Exhibit

Panel Change Order ORDER

PETITIONERS’ NOTICE OF CROSS-EXAMINATION OF DR. TURK OTHER

Transcript of April 30, 2026 Deposition of Dr. Dan Schonfeld Exhibit

P.R. 4-3 Joint Claim Construction and Prehearing Statement, Maxell, Ltd. v. Samsung Elecs. Co., Ltd., No. 5:25-cv-00052-RWS (E.D. Tex.) Exhibit

Patent Owner's Response to Petition for Inter Partes Review of U.S. Patent No. 8,471,950 RESPONSE

Declaration of Dr. Matthew Turk in Support of Patent Owner’s Response Exhibit

Patent Owner's Updated Mandatory Notices Under 37 C.F.R. § 42.8 NOTICE

Joint Stipulation to Modify Due Dates 1, 2, and 3 In Part OTHER

Patent Owner's Notice of Cross-Examination of Dan Schonfeld NOTICE

Order: Scheduling Order ORDER

Institution Decision: Grant DECISION

Director Discretionary Decision: Refer RESPONSE

EX1026 Exhibit

EX1010 Exhibit

EX1024 Exhibit

EX1027 Exhibit

EX1011 Exhibit

EX1029 Exhibit

Patent Owner Preliminary Response to Petition for Inter Partes Review of U.S. Patent No. 8,471,950 POPR

EX1020 Exhibit

EX1032 Exhibit

EX1018 Exhibit

EX1019 Exhibit

EX1013 Exhibit

EX1025 Exhibit

EX1016 Exhibit

EX1022 Exhibit

EX1028 Exhibit

EX1033 Exhibit

PETITIONERS’ OPPOSITION TO PATENT OWNER’S REQUEST FOR DISCRETIONARY DENIAL RESPONSE

EX1034 Exhibit

EX1030 Exhibit

EX1017 Exhibit

Ex. 3001 Exhibit

Order: Other ORDER

Law360 Article, “Maxell, Huawei Reach Terms To End Smartphone Patent Suit” Exhibit

Notice Letter to Samsung (July 7, 2021) Exhibit

Complaint, Maxell, Ltd. v. Samsung Elecs. Co., Ltd., No. 5:25-cv-00052-RWS (E.D. Tex.) Exhibit

Law360 Article, “Maxell Scores $43M EDTX Jury Win In ZTE Patent Trial” Exhibit

Hudson Institute Article, “Google’s Loss to Sonos Settles It, Big Tech Has an IP Piracy Problem” Exhibit

Follow-up Notice Letter to Samsung (December 29, 2021) Exhibit

Follow-up Notice Letter to Samsung (April 21, 2025) Exhibit

Jury Trial Transcript, Vol. 4, Maxell, Ltd. v. Samsung Elecs. Co., Ltd., No. 5:23-cv-00092-RWS (E.D. Tex.) Exhibit

PatentRenewal.com Article, “which-companies-hold-the-most-patents-in-the-world” Exhibit

Follow-up Notice Letter to Samsung (November 28, 2024) Exhibit

Law360 Article, “Maxell Settles Patent Suit Against Apple Over Mobile Tech” Exhibit

Docket Control Order, Maxell, Ltd. v. Samsung Elecs. Co., Ltd., No. 5:25-cv-00052-RWS (E.D. Tex.) Exhibit

Motion for Partial Summary Judgment of Validity Based on Sotera Stipulations, Maxell, Ltd. v. Samsung Elecs. Co., Ltd., No. 5:23-cv-00092-RWS (E.D. Tex.) Exhibit

Docket Navigator Time to Trial Statistics for the Eastern District of Texas Exhibit

Brief in Support of Patent Owner's Request for Discretionary Denial RESPONSE

PETITIONERS’ UPDATED EXHIBIT LIST OTHER

PETITIONERS’ STIPULATION Exhibit

Patent Owner's Mandatory Notices Under 37 C.F.R. § 42.8 NOTICE

Notice: Power of Attorney NOTICE

Notice: Notice filing date accorded NOTICE

U.S. Patent No. 8,471,950 Exhibit

SAMSUNG ELECTRONICS AMERICA, INC.’S POWER OF ATTORNEY NOTICE

U.S. Patent No. 8,237,850 to Tsujino Exhibit

JP2007-25559 to Shui Exhibit

Cert English Translation of Japanese Patent Pub No. 2007-25559 Exhibit

PETITION FOR INTER PARTES REVIEW OF U.S. PATENT NO. U.S. 8,471,950 PETITION

File History of U.S. Patent No. 8,471,950 Exhibit