Forward Citations = 37

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8 inventors (with patents filed for the assignee):

Shigenori Nagaoka (5 out of 7 patents)

Keiji Imai (5 out of 7 patents)

Tatsuo Hagiwara (4 out of 9 patents)

4. Toshitsugu Kikuchi (4 out of 4 patents)

5. Hidenaga Ishii (4 out of 4 patents)

6. Takeshi Imagawa (3 out of 3 patents)

7. Shinji Kogumazaka (3 out of 3 patents)

8. Kyoichi Yahagi (2 out of 3 patents)

5 patents: Sort by Forward Citations

1. 4749132 - Method for crushing massive furnace slag using a swingable type crushing (1988-06-07),

2. 4666591 - Slag disposal method (1987-05-19),

3. 4664321 - Shell structure of heavy-load type rod mill (1987-05-12),

4. 4645133 - Liner for the outlet port of a rod mill (1987-02-24),

5. 4637562 - Rocking slag breaker (1987-01-20),

Company Overview

Ishii Syoji, Ltd. is a leading manufacturer of industrial equipment and machinery based in Japan. With over 50 years of experience, the company specializes in providing high-quality products and solutions for various industries including automotive, aerospace, and semiconductor. Ishii Syoji is known for its commitment to innovation, customer satisfaction, and reliability.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#2,721 in Tokyo

#6,654 in Japan

Tokyo, Japan

Ishii Syoji, Ltd.

Forward Citations = 37

8 inventors:

Shigenori Nagaoka (5 out of 7 patents)

Keiji Imai (5 out of 7 patents)

Tatsuo Hagiwara (4 out of 9 patents)

4. Toshitsugu Kikuchi (4 out of 4 patents)

5. Hidenaga Ishii (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ishii Syoji, Ltd.. Retrieved from https://idiyas.com/company/ishii-syoji

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]