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Kajima Corporation

Calculating rank

USPTO Granted Patents = 152

% Expired Patents = 7.2

CIPO Patents = 1

EPO Patents = 8

Trademarks = 5

Forward Citations = 2,151

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395 inventors (with patents filed for the assignee):

Takuji Kobori (15 out of 15 patents)

Kuniaki Sato (14 out of 38 patents)

Koji Ishii (12 out of 24 patents)

4. Isao Nishimura (10 out of 34 patents)

5. Mitsuo Sakamoto (9 out of 17 patents)

6. Jun Tagami (9 out of 9 patents)

7. Shigeyuki Akihama (9 out of 10 patents)

8. Nobuyuki Matsui (8 out of 8 patents)

9. Naoki Niwa (7 out of 7 patents)

10. Katsuyasu Sasaki (7 out of 7 patents)

11. Mikio Kobayashi (7 out of 7 patents)

12. Tatsuo Suenaga (7 out of 7 patents)

13. Shigeru Ban (6 out of 9 patents)

14. Toshiyuki Hino (6 out of 11 patents)

15. Mitsuhiro Shibazaki (6 out of 9 patents)

Core Competencies:

Concrete Structures

Seismic Response Control

Vibration Damping

Hydrogen Production

Nanocarbon

Magnetic Shielding

Groundwater Monitoring

Hydraulic Dampers

Building Performance

Pneumatic Transfer

Coral Restoration

Pluripotent Stem Cells

152 patents: Sort by Forward Citations

1. 12699823 - Flow field prediction device, learning device, flow field prediction program, and learning program (2026-08-04),

2. D1119531 - Substrate for coral restoration (2026-03-24),

3. 10370632 - Facility for culturing pluripotent stem cells (2019-08-06),

4. 10184240 - Tank and method for constructing dike (2019-01-22),

5. 9976314 - Method for manufacturing concrete structure, concrete curing sheet for curing concrete (2018-05-22),

6. 9403682 - Method for producing nanocarbon and catalytic reaction device for producing nanocarbon (2016-08-02),

7. 8470406 - Method of spray application, and spray apparatus, for bentonite material (2013-06-25),

8. 8426045 - Internal-resistance measuring device for response-delay type fuel cell (2013-04-23),

9. 8066422 - Material moisture content adjustment method (2011-11-29),

10. 7964803 - Magnetic shield structure having openings and a magnetic material frame therefor (2011-06-21),

11. 7947245 - Method for producing nanocarbon and catalytic reaction device for producing nanocarbon (2011-05-24),

12. 7767182 - Method for producing functional nanocarbon and hydrogen by direct decomposition of lower hydrocarbon (2010-08-03),

13. 7501588 - Magnetic shielding door and magnetic shielding room (2009-03-10),

14. 7493954 - Systems and methods for installation, design and operation of groundwater monitoring systems in boreholes (2009-02-24),

15. 7287934 - Stratum disposal monitoring system (2007-10-30),

Company Overview

Kajima Corporation, headquartered in Tokyo, specializes in the development and construction of concrete structures, focusing on innovative solutions for seismic response control and vibration damping. The company is at the forefront of research in hydrogen production and nanocarbon technologies, contributing to advancements in sustainable engineering. Additionally, Kajima is involved in magnetic shielding and groundwater monitoring, employing hydraulic dampers to enhance structural integrity and resilience in various environments.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

152 Patents

#421 in Tokyo

#847 in Japan

#5,382 in the World

Kajima Corporation

Forward Citations = 2,151

395 inventors:

Takuji Kobori (15 out of 15 patents)

Kuniaki Sato (14 out of 38 patents)

Koji Ishii (12 out of 24 patents)

4. Isao Nishimura (10 out of 34 patents)

5. Mitsuo Sakamoto (9 out of 17 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kajima Corporation. Retrieved from https://idiyas.com/company/kajima

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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