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For the Inventor, By the Inventor

Tokyo, Japan

Kajima Road Company

Calculating rank
USPTO Granted Patents = 7

Forward Citations = 65

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16 inventors (with patents filed for the assignee):

goldMedal Mitsuo Fukukawa (5 out of 6 patents)

silverMedal Masayuki Yazawa (4 out of 5 patents)

bronzeMedal Yoshiharu Okamoto (4 out of 5 patents)

4.  Kazumitsu Asai (4 out of 5 patents)

5.  Seiichiro Takizawa (2 out of 2 patents)

6.  Kunio Shinohara (2 out of 2 patents)

7.  Hiroshi Ishikawa (1 out of 2 patents)

8.  Shigeyuki Takahashi (1 out of 9 patents)

9.  Tetsuo Tanaka (1 out of 12 patents)

10.  Tetsuo Akiyama (1 out of 3 patents)

11.  Takeshi Kimura (1 out of 1 patent)

12.  Toshiki Hatakenaka (1 out of 1 patent)

13.  Shinji Asada (1 out of 1 patent)

14.  Yukio Yamagishi (1 out of 1 patent)

15.  Kohei Mio (1 out of 2 patents)


7 patents:

1. 4970800 - Method and apparatus for grading and measuring a surface having a curved (1990-11-20),
2. 4861189 - System for paving inclined and/or curved surfaces (1989-08-29),
3. 4852278 - Method and apparatus for grading and measuring a surface having a curved (1989-08-01),
4. 4801219 - System for compacting paved surfaces (1989-01-31),
5. 4699543 - Slope paving machine (1987-10-13),
6. 4561800 - Method of heating a road surface and apparatus therefor (1985-12-31),
7. 4483620 - Regenerative heating and melting device for recovered asphalt concrete (1984-11-20),
Company Overview
Kajima Road Company is a leading construction company specializing in road infrastructure projects. With a strong focus on quality and sustainability, Kajima Road Company delivers innovative solutions for infrastructure development. Their expertise includes road construction, maintenance, and rehabilitation projects, ensuring safe and efficient transportation networks for communities.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

7 Patents

#2,290 in Tokyo

#5,462 in Japan

Tokyo, JP
Tokyo, Japan

Kajima Road Company

Forward Citations = 65

16 inventors:

goldMedal Mitsuo Fukukawa (5 out of 6 patents)

silverMedal Masayuki Yazawa (4 out of 5 patents)

bronzeMedal Yoshiharu Okamoto (4 out of 5 patents)

4.  Kazumitsu Asai (4 out of 5 patents)

5.  Seiichiro Takizawa (2 out of 2 patents)

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