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For the Inventor, By the Inventor

Tokyo, Japan

Kurosawa Construction Co., Ltd.

Calculating rank
USPTO Granted Patents = 11

% Expired Patents = 27.3


Forward Citations = 37

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7 inventors (with patents filed for the assignee):

goldMedal Ryohei Kurosawa (8 out of 8 patents)

silverMedal Kei Hirai (3 out of 3 patents)

bronzeMedal Takeshi Hasui (3 out of 3 patents)

4.  Takatsugu Fujikawa (3 out of 3 patents)

5.  Shigeru Hyakutake (1 out of 1 patent)

6.  Hitoyuki Takagi (1 out of 1 patent)

7.  Naoki Matsubara (1 out of 25 patents)

8.  Kurosawaa Ryohei (0 patent)

9.  Hirai Kei (0 patent)


11 patents:

1. 11377841 - Junction structure of prestressed concrete (PC) column and steel beam (2022-07-05),
2. 11352790 - Method of introducing prestress to beam-column joint of PC structure in triaxial compression (2022-06-07),
3. 11111664 - Method of introducing prestress to beam-column joint in triaxial compression (2021-09-07),
4. 10378197 - Method for jointing concrete column and iron beam (2019-08-13),
5. 9534411 - Earthquake resisting design method on the basis of PC binding articulation construction method (2017-01-03),
6. 8882944 - Method for forming rustproof film on PC strand and PC strand (2014-11-11),
7. 8833050 - Double rustproof PC strand (2014-09-16),
8. 8191251 - Method for forming rustproof film on a PC strand (2012-06-05),
9. 7585562 - Prestressing strand having corrosion protection double coatings (2009-09-08),
10. 7241473 - Method of forming corrosion protection double coatings on prestressing strand and prestressing strand produced by the method (2007-07-10),
11. 5362326 - Apparatus for forming corrosion protection coatings on prestressing (1994-11-08),
Company Overview
Kurosawa Construction Co., Ltd. is a prominent player in the construction industry, specializing in a wide range of civil engineering and architectural projects. Based in Tokyo, the company focuses on innovative building solutions, integrating advanced technologies to enhance structural integrity and sustainability. With a commitment to quality and safety, Kurosawa Construction engages in various sectors, including residential, commercial, and infrastructure development, contributing to urban growth and modernization in Japan.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

11 Patents

#1,809 in Tokyo

#4,142 in Japan

#51,873 in the World

Tokyo, JP
Tokyo, Japan

Kurosawa Construction Co., Ltd.

Forward Citations = 37

7 inventors:

goldMedal Ryohei Kurosawa (8 out of 8 patents)

silverMedal Kei Hirai (3 out of 3 patents)

bronzeMedal Takeshi Hasui (3 out of 3 patents)

4.  Takatsugu Fujikawa (3 out of 3 patents)

5.  Shigeru Hyakutake (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kurosawa Construction Co., Ltd.. Retrieved from https://idiyas.com/company/kurosawa-construction-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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