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For the Inventor, By the Inventor

Tokyo, Japan

Kajima Corporation


USPTO Granted Patents = 152

% Expired Patents = 7.2



Trademarks = 5

Forward Citations = 2,151

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395 inventors (with patents filed for the assignee):

goldMedal Takuji Kobori (15 out of 15 patents)

silverMedal Kuniaki Sato (14 out of 38 patents)

bronzeMedal 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:

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),
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 based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

Kajima Corporation
152 Patents

#420 in Tokyo

#845 in Japan

#5,366 in the World

Tokyo, JP
Tokyo, Japan

Kajima Corporation

Forward Citations = 2,151

395 inventors:

goldMedal Takuji Kobori (15 out of 15 patents)

silverMedal Kuniaki Sato (14 out of 38 patents)

bronzeMedal Koji Ishii (12 out of 24 patents)

4.  Isao Nishimura (10 out of 34 patents)

5.  Mitsuo Sakamoto (9 out of 17 patents)

Please report any incorrect information to [email protected]
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