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For the Inventor, By the Inventor

Osaka, Japan

Ohbayashi-Gumi, Ltd.

Calculating rank
USPTO Granted Patents = 12

Forward Citations = 263

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38 inventors (with patents filed for the assignee):

goldMedal Toru Aoyagi (3 out of 13 patents)

silverMedal Toshio Adachi (2 out of 2 patents)

bronzeMedal Shigeki Yamanaka (2 out of 2 patents)

4.  Yukio Kida (2 out of 2 patents)

5.  Takeshi Kawachi (1 out of 3 patents)

6.  Hideki Yamaguchi (1 out of 57 patents)

7.  Yoshimasa Hayashi (1 out of 5 patents)

8.  Tsuyoshi Aoyama (1 out of 6 patents)

9.  Jiro Saito (1 out of 1 patent)

10.  Kaoru Kimura (1 out of 1 patent)

11.  Kazuyoshi Nakaguma (1 out of 1 patent)

12.  Hiroshi Kusuhara (1 out of 1 patent)

13.  Hirotaka Toba (1 out of 3 patents)

14.  Toshio Fujiwara (1 out of 1 patent)

15.  Junji Sakimoto (1 out of 1 patent)


12 patents:

1. 4751800 - Openable dome-shaped roof structure (1988-06-21),
2. 4727688 - Retractable roof structure (1988-03-01),
3. 4715726 - Method of measuring the strength of concrete for slip form process (1987-12-29),
4. 4706419 - Openable dome-shaped roof structure (1987-11-17),
5. 4653674 - Device for dispensing goods through annular dispensing port (1987-03-31),
6. 4565039 - Floor structure for reducing vibration (1986-01-21),
7. 4551256 - Slurry excavating method (1985-11-05),
8. 4361254 - Hopper for storing free flowing solid material (1982-11-30),
9. 4266885 - Method of constructing a continuous cut-off wall and a core of a (1981-05-12),
10. 4209268 - Tail packing for a slurry pressurized shield (1980-06-24),
11. 4205040 - Exposed aggregate finishing method for concrete (1980-05-27),
12. 3965686 - Drain sheet material (1976-06-29),
Company Overview
Ohbayashi-Gumi, Ltd. is a prominent construction and engineering firm based in Osaka, Japan. The company specializes in a diverse range of infrastructure projects, including civil engineering, building construction, and urban development. With a strong emphasis on innovative engineering solutions, Ohbayashi-Gumi is involved in various sectors such as transportation, water resources, and environmental management. The firm is committed to advancing sustainable practices and enhancing the quality of life through its comprehensive engineering expertise.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

12 Patents

#425 in Osaka

#3,938 in Japan

#48,235 in the World

Osaka, JP
Osaka, Japan

Ohbayashi-Gumi, Ltd.

Forward Citations = 263

38 inventors:

goldMedal Toru Aoyagi (3 out of 13 patents)

silverMedal Toshio Adachi (2 out of 2 patents)

bronzeMedal Shigeki Yamanaka (2 out of 2 patents)

4.  Yukio Kida (2 out of 2 patents)

5.  Takeshi Kawachi (1 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ohbayashi-Gumi, Ltd.. Retrieved from https://idiyas.com/company/ohbayashi-gumi

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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