Asserter profile
Maxell, Ltd.
NPE43 patents now51 ever28 cases filed during tenure7 connections
Also seen as: Maxell Holdings, Ltd. · MAXELL, LTD. · MAXELL HOLDINGS, LTD.
PTAB exposure
9of this entity’s patents have been challenged at PTAB (9 total proceedings). 1 had claims invalidated. 5 currently have active proceedings.
Final written decisions are public record. The invalidation grounds usually carry over as § 102 / § 103 ammunition in district court — see IPR estoppel.
Two-hop network
Edges marked ⚖️ overlap with at least one infringement suit filed during the receiving entity’s tenure with the patent. Bold-bordered = this entity. Red = NPE; orange = shell LLC; green = defensive aggregator; blue = operating company.
flowchart LR
Nmaxell["Maxell, Ltd."]
Nhitachi_maxell["Hitachi Maxell, Ltd."]
Nk_mizuno_ip_management["K. MIZUNO IP MANAGEMENT LLC"]
Nhashimoto_yasunobu_masuoka_nobuo["HASHIMOTO, YASUNOBU; MASUOKA, NOBUO"]
Nmaxell_japan["MAXELL, LTD., JAPAN"]
Nhitachi_lg_data_storage["Hitachi-LG Data Storage, Inc."]
Nonkyo["Onkyo Corporation"]
Nhigaki_hiroyuki_matsubara_takashi_nakade_mayumi_yamazaki_mas["Higaki, Hiroyuki; Matsubara, Takashi; N…"]
Neriko_nagata_shinji_onodera_satomi_morishita_naoya_oka_masaa["Eriko Nagata, Shinji ONODERA, Satomi Mo…"]
Nhitachi_consumer_electronics["Hitachi Consumer Electronics Co., Ltd."]
Nhitachi["Hitachi, Ltd."]
Nhitachi_industry_and_control_solutions["Hitachi Industry & Control Solutions, L…"]
Ncf_maxell_jp["CF MAXELL JP LLC"]
Nmaxell_akatsuki_ip["MAXELL AKATSUKI IP LLC"]
Nhitachi_maxell_japan["HITACHI MAXELL, LTD., JAPAN"]
Npioneer["Pioneer Corporation"]
Nhitachi_maxell -->|"2017 · Assignment · 9900569"| Nmaxell
Nmaxell -->|"2023 · Assignment · 9900569"| Nk_mizuno_ip_management
Nhashimoto_yasunobu_masuoka_nobuo -->|"2019 · Assignment · 10812646"| Nmaxell
Nhitachi_maxell -->|"2018 · Assignment · 11026088"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 7577417"| Nmaxell
Nhitachi_maxell -->|"2018 · Assignment · 7952645"| Nmaxell
Nmaxell -->|"2021 · Merger · 8471950"| Nmaxell_japan
Nmaxell -->|"2021 · Merger · 8180198"| Nmaxell_japan
Nhitachi_lg_data_storage -->|"2023 · Assignment · 11812091"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 8170394"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 6928292"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 9420212"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 8059177"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 7072673"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 6816491"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 6329794"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2018 · Assignment · 6408193"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 7116438"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 10084991"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2018 · Assignment · 6928306"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 6430498"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 7995897"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 6580999"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 10212586"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 9818449"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 7421188"| Nmaxell
Nonkyo -->|"2019 · Assignment · 7421188"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 6973334"| Nmaxell
Nhitachi_maxell -->|"2018 · Assignment · 6856760"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 8736729"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2018 · Assignment · 6748317"| Nmaxell
Nhitachi_maxell -->|"2018 · Change of Name · 5396443"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 7551209"| Nmaxell
Nhitachi_maxell -->|"2017 · Change of Name · 11017815"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 11924502"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 10176848"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 9451229B2"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 8130284B2"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 7203517"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2018 · Assignment · 6765616B1"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 10958971"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 8549109"| Nmaxell
Nhigaki_hiroyuki_matsubara_takashi_nakade_mayumi_yamazaki_mas -->|"2018 · Assignment · 8549109"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 10244284"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2017 · Assignment · 8982086"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 9100604"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2018 · Assignment · 7324487"| Nmaxell
Nhitachi_maxell ==>|"⚖️ 2018 · Assignment · 7199821"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 7062758"| Nmaxell
Nhitachi_maxell -->|"2017 · Assignment · 7450090"| Nmaxell
Neriko_nagata_shinji_onodera_satomi_morishita_naoya_oka_masaa -->|"2016 · Assignment · 9900569"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7577417"| Nhitachi_maxell
Nhitachi -->|"2014 · Assignment · 7952645"| Nhitachi_maxell
Nhitachi_maxell -->|"2017 · Change of Name · 8180198"| Nmaxell_japan
Nhitachi_consumer_electronics -->|"2014 · Assignment · 8170394"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6928292"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 5974218"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 9420212"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 8059177"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7072673"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6816491"| Nhitachi_maxell
Nhitachi_industry_and_control_solutions ==>|"⚖️ 2016 · Assignment · 6816491"| Nhitachi_maxell
Nhitachi_consumer_electronics ==>|"⚖️ 2014 · Assignment · 6329794"| Nhitachi_maxell
Nhitachi_consumer_electronics ==>|"⚖️ 2014 · Assignment · 6408193"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7116438"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"Assignment · 10084991"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6928306"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6430498"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7995897"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6580999"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 10212586"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 10199072"| Nhitachi_maxell
Nhitachi -->|"2017 · Assignment · 9818449"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7421188"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6973334"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6856760"| Nhitachi_maxell
Nhitachi_consumer_electronics ==>|"⚖️ 2014 · Assignment · 8736729"| Nhitachi_maxell
Nhitachi_consumer_electronics ==>|"⚖️ Corporate Succession · 8339493"| Nhitachi_maxell
Nhitachi_consumer_electronics ==>|"⚖️ 2014 · Assignment · 6748317"| Nhitachi_maxell
Nhitachi_consumer_electronics ==>|"⚖️ Assignment · 5396443"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7551209"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"Assignment · 11017815"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 11924502"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"Assignment · 10176848"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 9451229B2"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 8130284B2"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7203517"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 6765616B1"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 8549109"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"Assignment · 10244284"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 8982086"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 9100604"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7324487"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7199821"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7062758"| Nhitachi_maxell
Nhitachi_consumer_electronics -->|"2014 · Assignment · 7450090"| Nhitachi_maxell
Nk_mizuno_ip_management -->|"2023 · Security Agreement · 9900569"| Ncf_maxell_jp
Nk_mizuno_ip_management -->|"2023 · Assignment · 9900569"| Nmaxell_akatsuki_ip
Nhitachi_maxell_japan -->|"2017 · Assignment · 8471950"| Nmaxell_japan
Npioneer -->|"2019 · Assignment · 7421188"| Nonkyo
classDef focal fill:#fef3c7,stroke:#92400e,stroke-width:3px,color:#1c1917
classDef npe fill:#fee2e2,stroke:#be123c,stroke-width:2px,color:#1c1917
classDef shell fill:#fed7aa,stroke:#9a3412,stroke-width:2px,color:#1c1917
classDef defensive fill:#dcfce7,stroke:#15803d,stroke-width:2px,color:#1c1917
classDef operating fill:#e0f2fe,stroke:#075985,stroke-width:1px,color:#1c1917
class Nmaxell focal
class Nhitachi_maxell npe
class Nk_mizuno_ip_management shell
class Nmaxell_japan operating
class Nhitachi_lg_data_storage operating
class Nonkyo operating
class Nhitachi_consumer_electronics operating
class Nhitachi operating
class Nhitachi_industry_and_control_solutions operating
class Nmaxell_akatsuki_ip npe
class Nhitachi_maxell_japan operating
class Npioneer operating
Patents currently held (50)
- US 119245022017-10-01 → present
- US 70627582017-10-01 → present
- US 74500902017-10-01 → present
- US 81703942021-10-01 → present
- Maxell, Ltd. v. VIZIO, Inc. filed 2022-09-15
- US 69282922021-10-01 → present
- US 68164912021-10-01 → present
- US 63297942021-10-01 → present
- US 71164382021-10-01 → present
- US 64304982021-10-01 → present
- US 102125862021-10-01 → present
- US 74211882021-10-01 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- US 69733342021-10-01 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- US 87367292021-10-01 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- US 114518602021-10-01 → present
- US 112237572021-10-01 → present
- Maxell, Ltd. v. Samsung Electronics Co., Ltd. et al. filed 2023-09-07
- US 72035172021-10-01 → present
- US 109589712021-10-01 → present
- Maxell, Ltd. v. VIZIO, Inc. filed 2022-09-15
- Maxell, Ltd. v. TCL Electronics Holdings Ltd. (f/k/a TCL Multimedia Technology Holdings Ltd.) et al. filed 2024-08-22
- US 102442842021-10-01 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- Maxell, Ltd. v. Lenovo Group Ltd. et al. filed 2022-03-30
- US 89820862021-10-01 → present
- Maxell, Ltd. v. Samsung Electronics Co., Ltd. et al. filed 2023-09-07
- Maxell, Ltd. v. Samsung Electronics Co., Ltd. filed 2025-04-21
- Maxell, Ltd. v. Samsung Electronics Co., Ltd. et al. filed 2025-04-21
- Maxell, Ltd. v. SAMSUNG ELECTRONICS CO., LTD. filed 2025-04-21
- US 94202122021-12-03 → present
- US 80591772021-12-03 → present
- US 70726732021-12-03 → present
- US 64081932021-12-03 → present
- US 100849912021-12-03 → present
- US 69283062021-12-03 → present
- US 79958972021-12-03 → present
- US 65809992021-12-03 → present
- US 101990722021-12-03 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- US 98184492021-12-03 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- US 68567602021-12-03 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- US 67483172021-12-03 → present
- US 53964432021-12-03 → present
- US 75512092021-12-03 → present
- US 110178152021-12-03 → present
- Maxell, Ltd. v. VIZIO, Inc. filed 2022-09-15
- Maxell, Ltd. v. Samsung Electronics Co., Ltd. et al. filed 2023-09-07
- US 101768482021-12-03 → present
- Maxell, Ltd. v. Samsung Electronics Co., Ltd. et al. filed 2023-09-07
- US 9451229B22021-12-03 → present
- US 8130284B22021-12-03 → present
- US 6765616B12021-12-03 → present
- US 85491092021-12-03 → present
- Maxell, Ltd. v. VIZIO, Inc. filed 2022-09-15
- Maxell, Ltd. v. TCL Electronics Holdings Ltd. (f/k/a TCL Multimedia Technology Holdings Ltd.) et al. filed 2024-08-22
- US 91006042021-12-03 → present
- US 73244872021-12-03 → present
- US 71998212021-12-03 → present
- Maxell, Ltd. v. LG Electronics Inc. et al. filed 2023-12-29
- Maxell, Ltd. v. Lenovo Group Ltd. et al. filed 2022-03-30
Patents previously held (1)
Connected entities (7)
- Hitachi Maxell, Ltd.NPE43 patents · ⚖️ 32
- MAXELL, LTD., JAPANoperating company2 patents
- K. MIZUNO IP MANAGEMENT LLCshell LLC1 patent
- HASHIMOTO, YASUNOBU; MASUOKA, NOBUOindividual1 patent
- Hitachi-LG Data Storage, Inc.operating company1 patent
- Onkyo Corporationoperating company1 patent
- Higaki, Hiroyuki; Matsubara, Takashi; Nakade, Mayumi; Yamazaki, Masahiroindividual1 patent
Correspondent attorneys (11)
Attorneys / firms recorded with USPTO when this entity received a patent. Recurrence is the signal — many firms do both NPE and operating-company patent work, so a single appearance doesn’t mean much.
- Nadeen Nsouli19 appearances
- AKIRA SUZUYE· SUZUYE AND SUZUYE3 appearances
- Bjoern E. Ekmark· Guntin & McClammy3 appearances
- Nadeen Nsouli· Mayer Brown3 appearances
- Masahiro Yoshida2 appearances
- (no name)· MCDERMOTT WILL & EMERY2 appearances
- HAHN, KENT2 appearances
- Yasuhiko Suzuki· Suzuys & Suzuys1 appearance
- KOBAYASHI, TAKASHI· ANTONELLI, TERRY, STOUT & KRAUS1 appearance
- Jeffrey M. Linger· Maxell1 appearance
- DANIEL J. BLANCHARD· MCGEE & ASSOCIATES1 appearance