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For the Inventor, By the Inventor

Osaka, Japan

Itoki Co., Ltd.


USPTO Granted Patents = 27

Forward Citations = 750

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23 inventors (with patents filed for the assignee):

goldMedal Isao Hosoe (11 out of 25 patents)

silverMedal Toru Nagao (5 out of 5 patents)

bronzeMedal Yuji Ishi (5 out of 5 patents)

4.  Noboru Inoue (3 out of 14 patents)

5.  Hironaga Obata (3 out of 3 patents)

6.  Tetsuya Kano (3 out of 3 patents)

7.  Tamio Sakurai (2 out of 4 patents)

8.  Shunichi Takamatsu (2 out of 6 patents)

9.  Harumatsu Sato (2 out of 2 patents)

10.  Koichiro Hayashi (2 out of 2 patents)

11.  Hiroshi Ito (1 out of 2 patents)

12.  Shigeki Tsuchida (1 out of 1 patent)

13.  Motohiro Nakagawa (1 out of 1 patent)

14.  Sabarou Sumi (1 out of 1 patent)

15.  Yasuo Uematsu (1 out of 1 patent)


Core Competencies:
Chair
Desk
Table
Safety-Deposit Box
Shell Structure
Interlocking Mechanism
Cushioning Mechanism
Automatic Code Reading
Retrieval Device
Wall Cabinet
Tilting Mechanism
Automatic Rental Safe

27 patents:

1. D515831 - Chair (2006-02-28),
2. D512251 - Desk (2005-12-06),
3. D510492 - Desk (2005-10-11),
4. 5475376 - Safety-deposit box system (1995-12-12),
5. D352853 - Table (1994-11-29),
6. D352852 - Table (1994-11-29),
7. D352851 - Table (1994-11-29),
8. D352409 - Table (1994-11-15),
9. D352408 - Table (1994-11-15),
10. D352194 - Table (1994-11-08),
11. 5338099 - Shell structure for use with a chair having synchronously moving seat (1994-08-16),
12. D348571 - Chair (1994-07-12),
13. 5314240 - Shell structure for use with a chair having synchronously moving seat (1994-05-24),
14. D346909 - Chair (1994-05-17),
15. 5238294 - Interlocking mechanism for supporting seat and seat back of chair (1993-08-24),
Company Overview
Itoki Co., Ltd. is a prominent Japanese company based in Osaka, specializing in the development and manufacturing of office furniture and workspace solutions. The company focuses on creating innovative products that enhance workplace efficiency and comfort, integrating ergonomic design principles with modern aesthetics. Itoki is also involved in research related to office environments, aiming to improve productivity through thoughtful design and technology integration, catering primarily to the Asian market.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

27 Patents

#262 in Osaka

#2,454 in Japan

#23,984 in the World

Osaka, JP
Osaka, Japan

Itoki Co., Ltd.

Forward Citations = 750

23 inventors:

goldMedal Isao Hosoe (11 out of 25 patents)

silverMedal Toru Nagao (5 out of 5 patents)

bronzeMedal Yuji Ishi (5 out of 5 patents)

4.  Noboru Inoue (3 out of 14 patents)

5.  Hironaga Obata (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Itoki Co., Ltd.. Retrieved from https://idiyas.com/company/itoki-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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