OneTwelve AI

Ownership time machine · real data

Toshiba Corporation

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Multi-Factor Intelligence

Japan · group structure from the OneTwelve entity map

Thirty years of Toshiba patent ownership, fully traced.

OneTwelve’s Multi-Factor Intelligence Tools untangle decades of assignments, mergers, spin-offs and renames into one crystal-clear picture — and every step links back to the recorded USPTO document behind it.

43,243
plus 59,885 pending applications
U.S. patents held today by the Toshiba group
39
the rest sit with subsidiaries such as Toshiba Electronic Devices & Storage
Recorded moves shown
4,165
all recorded assignments
Patents & applications acquired from outside the group
15,611
all recorded assignments
Patents & applications transferred out of the group

Recorded USPTO assignments since 1990. 71,483 inventor-to-employer assignments are counted separately and not shown as moves.

2026ACQUIREDWITHIN GROUPTRANSFERRED1995200020052010201520202025Toshiba MemoryToshiba MedicalToshiba ClientCBSNorthrop GrummanToshiba TecToshiba ElectronicFujitsu ToshibaInternational Business
AS OF 2026
39
Moves
3,001
In
13,813
Out
516
In group

Drag across the chart to zoom into any period · click a move for its recorded evidence · ← → to step through moves

Where the patents went

Band width = patents in the recorded move. Press play to scan through the years. Click a band.

The biggest recorded moves · 13 of 38

ACQUIREDTRANSFERRED OUTWITHIN THE TOSHIBA GROUPNo acquisitions recorded in these yearsNo transfers out in these yearsCBS752 patents · 1999Toshiba Tec490 patents · 2003International Business430 patents · 2012Toshiba Infrastructure353 patents · 2025Toshiba America302 patents · 1996Toshiba Storage288 patents · 2012Toshiba Memory6,720 patents · 2017Toshiba Medical2,502 patents · 2005Toshiba Client811 patents · 2016Northrop Grumman704 patents · 1996Fujitsu Toshiba461 patents · 2010Toshiba Electronic472 patents · 2017Kabushiki Kaisha44 patents · 1995ToshibagroupAS OF2026
Transferred out

2017-06-20 → 2025-09-05

6,720 patents transferred to Toshiba Memory Corporation

158 recorded documents · via Kabushiki Kaisha Toshiba

The path, as recorded

Steps after Toshiba Memory Corporation are its own later recorded transfers, which can include patents it already held.

  1. 1Kabushiki Kaisha ToshibaToshiba group
  2. 2Toshiba Memory Corporation6,720 patents · 2017
  3. 3K.K. Pangearenamed · 6,692 patents · 2018
  4. 4K.K. Pangealater transfer recorded by the recipient · 6,294 patents · 2019
  5. 5Kioxia Corporationrenamed · 7,826 patents · 2019

Recorded assignments · USPTO reel/frame

  • 43194/6472017-07-14
    ASSIGNMENT OF ASSIGNOR'S INTEREST488 patents
  • 43328/3882017-07-26
    ASSIGNMENT OF ASSIGNOR'S INTEREST273 patents
  • 43709/352017-08-24
    ASSIGNMENT OF ASSIGNOR'S INTEREST4,142 patents

Patents moved per year · click a year to zoom

Bar height on a square-root scale. Exact recorded totals per year, all assignments (not only the moves shown).

Group membership today · entity map

  • KioxiaSeparate ultimate owner (Kioxia Holdings Corporation)
  • Toshiba TecSeparate ultimate owner (Toshiba Tec Corporation)
  • Canon Medical SystemsSeparate ultimate owner (CANON INC)

Where this comes from

OneTwelve ownership graph, as of 2026-09-28. Recorded USPTO assignments (ownership transfers, mergers and name changes; security interests, releases and inventor assignments excluded). Patent counts sum the properties on the recorded documents. Group membership per the OneTwelve entity map; joined-the-group dates come from corporate registry records and reviewed disclosures. Moves of 40+ patents are shown; inventor-to-employer assignments are excluded. Recorded assignments show where patents moved; on their own they do not prove the business reason for a move. Story captions are generated from the recorded moves.

Toshiba patent ownership history: the recorded moves

Between 1994 and 2025, recorded USPTO assignments show the Toshiba group acquiring 4,165 patents and applications from outside the group and transferring 15,611 out of it. 38 moves of 40 or more patents are traced here, each tied to the recorded document behind it. Today the group holds 43,243 U.S. patents and 59,885 pending applications.

Largest transfers out: Toshiba Memory Corporation (6,720 patents, 2017); Toshiba Medical Systems Corporation (2,502 patents, 2005); Toshiba Client Solutions Co., Ltd (811 patents, 2016).

Largest acquisitions: CBS Corporation (752 patents, 1999); Toshiba Tec Kabushiki Kaisha (490 patents, 2003); International Business Machines Corporation (430 patents, 2012).

All 39 recorded moves, by year

2025

  • Toshiba Infrastructure Systems & Solutions Corporation merged into Kabushiki Kaisha Toshiba: 353 patents · USPTO reel/frame 72053/393, recorded 2025-07-18
  • 76 patents transferred to Niterra Materials Co., Ltd. · USPTO reel/frame 72548/684, recorded 2025-09-30

2022

  • 115 patents transferred to International Semiconductor Group · USPTO reel/frame 61744/776, recorded 2022-11-11

2021

  • 69 patents transferred to Palmira Wireless AG · USPTO reel/frame 58899/686, recorded 2021-11-24

2020

  • 137 patents transferred to Seoul Semiconductor Co., Ltd. · USPTO reel/frame 52316/44, recorded 2020-04-06

2019

  • 241 patents transferred to Toshiba Digital Solutions Corporation · USPTO reel/frame 48547/187, recorded 2019-03-08

2018

  • 79 patents transferred to Toshiba Energy Systems & Solutions Corporation · USPTO reel/frame 45345/548, recorded 2018-03-26
  • 213 patents transferred to Toshiba Visual Solutions Corporation · USPTO reel/frame 46881/120, recorded 2018-04-26

2017

  • 97 patents transferred to Microsoft Technology Licensing, LLC · USPTO reel/frame 41333/955, recorded 2017-01-11
  • 6,720 patents transferred to Toshiba Memory Corporation · USPTO reel/frame 43194/647, recorded 2017-07-14
  • Westinghouse Electric Company LLC joined the Toshiba group
  • 472 patents moved to Toshiba Electronic Devices & Storage Corporation · USPTO reel/frame 46364/164, recorded 2018-06-14
  • 155 patents transferred to Alpad Corporation · USPTO reel/frame 44258/945, recorded 2017-11-30

2016

  • 175 patents transferred to Samsung Electronics Co., Ltd. · USPTO reel/frame 37536/743, recorded 2016-01-20
  • 90 patents transferred to Toshiba Electron Tubes & Devices Co., Ltd. · USPTO reel/frame 38184/614, recorded 2016-04-04
  • 97 patents acquired from Ocz Storage Solutions, Inc. · USPTO reel/frame 38269/674, recorded 2016-04-13
  • 811 patents transferred to Toshiba Client Solutions Co., Ltd. · USPTO reel/frame 48991/183, recorded 2018-12-10

2014

  • 67 patents acquired from Toshiba Techno Center Inc. · USPTO reel/frame 33265/62, recorded 2014-07-08
  • 214 patents transferred to Toshiba Lifestyle Products & Services Corporation · USPTO reel/frame 39559/557, recorded 2016-08-03

2012

  • 288 patents acquired from Toshiba Storage Device Corporation · USPTO reel/frame 27590/695, recorded 2012-01-25
  • 430 patents acquired from International Business Machines Corporation · USPTO reel/frame 28895/935, recorded 2012-09-04

2010

  • 240 patents transferred to Toshiba Mobile Display Co., Ltd. · USPTO reel/frame 24599/63, recorded 2010-06-28
  • 42 patents acquired from Advanced Mask Inspection Technology Inc. · USPTO reel/frame 25008/164, recorded 2010-09-20
  • 461 patents transferred to Fujitsu Toshiba Mobile Communications Limited · USPTO reel/frame 25433/713, recorded 2010-12-01

2006

  • 49 patents transferred to TDK Corporation · USPTO reel/frame 39196/17, recorded 2016-07-20

2005

  • 2,502 patents transferred to Toshiba Medical Systems Corporation · USPTO reel/frame 38891/693, recorded 2016-05-31

2004

  • 71 patents transferred to Toshiba Mitsubishi-Electric Industrial Systems Corporation · USPTO reel/frame 15147/86, recorded 2004-09-20

2003

  • 490 patents acquired from Toshiba Tec Kabushiki Kaisha · USPTO reel/frame 14027/519, recorded 2003-05-05

2001

  • Ce Nuclear Power LLC merged into Westinghouse Electric Co. LLC: 180 patents · USPTO reel/frame 11742/299, recorded 2001-04-30

2000

  • 83 patents transferred to Toshiba Tec Kabushiki Kaisha · USPTO reel/frame 11238/790, recorded 2000-10-17

1999

  • 752 patents acquired from CBS Corporation · USPTO reel/frame 10070/819, recorded 1999-06-24

1997

  • 48 patents transferred to Crane Company · USPTO reel/frame 8568/930, recorded 1997-06-30
  • 41 patents transferred to Scientific Ecology Group, Inc., The · USPTO reel/frame 8677/620, recorded 1997-08-12

1996

  • 238 patents transferred to Knoll, Inc. · USPTO reel/frame 7888/22, recorded 1996-04-08
  • 302 patents acquired from Toshiba America Electronic Components, Inc. · USPTO reel/frame 25777/577, recorded 2011-02-09
  • 704 patents transferred to Northrop Grumman Corporation · USPTO reel/frame 8104/190, recorded 1996-07-16

1995

  • 44 patents moved to Kabushiki Kaisha Toshiba · USPTO reel/frame 38595/821, recorded 2016-05-03
  • 115 patents transferred to Micron Technology, Inc. · USPTO reel/frame 7722/71, recorded 1995-11-03

1994

  • 69 patents transferred to Eaton Corporation · USPTO reel/frame 6973/111, recorded 1994-04-26