Asserter profile

MAXELL, LTD.

operating company8 patents now9 ever3 cases filed during tenure5 connections

Also seen as: MAXELL HOLDINGS, LTD. · Maxell, 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."]
    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."]
    Ncf_maxell_jp["CF MAXELL JP LLC"]
    Nmaxell_akatsuki_ip["MAXELL AKATSUKI IP LLC"]
    Nhitachi_maxell_japan["HITACHI MAXELL, LTD., JAPAN"]
    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
    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
    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
    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 operating
    class Nk_mizuno_ip_management shell
    class Nmaxell_japan operating
    class Nhitachi_lg_data_storage operating
    class Nhitachi_consumer_electronics operating
    class Nhitachi operating
    class Nmaxell_akatsuki_ip npe
    class Nhitachi_maxell_japan operating

Patents currently held (8)

Patents previously held (1)

Connected entities (5)

Correspondent attorneys (9)

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.