% Expired Patents = 25.0

Forward Citations = 87

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10 inventors (with patents filed for the assignee):

Kenichi Kobayashi (1 out of 192 patents)

Hiroshi Nakagawa (1 out of 16 patents)

Masahiro Aoyagi (1 out of 18 patents)

4. Katsuya Kikuchi (1 out of 15 patents)

5. Yoshikuni Okada (1 out of 7 patents)

6. Kazuhiko Tokoro (1 out of 6 patents)

7. Sadaji Murakami (1 out of 1 patent)

8. Teruo Mitsuta (1 out of 1 patent)

9. Shinichi Suzuki (1 out of 1 patent)

10. Hiroyuki Fujita (1 out of 9 patents)

4 patents: Sort by Forward Citations

1. 7414422 - System in-package test inspection apparatus and test inspection method (2008-08-19),

2. 5732535 - Method for packaging article utilizing atmospheric pressure and (1998-03-31),

3. 5581983 - Gas injection device for gas bag having serial closed cells (1996-12-10),

4. 4454036 - Oil filter (1984-06-12),

Company Overview

Shinwa Corp. Ltd. is a leading provider of construction and engineering services. With over two decades of experience, the company has established a strong reputation for delivering high-quality projects on time and within budget. Shinwa Corp. Ltd. is committed to excellence in every aspect of its business, from design and planning to execution and completion. The company operates in multiple countries and continues to expand its presence in the global construction industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#266 in Kanagawa

#7,588 in Japan

Kanagawa, Japan

Shinwa Corp. Ltd.

Forward Citations = 87

10 inventors:

Kenichi Kobayashi (1 out of 192 patents)

Hiroshi Nakagawa (1 out of 16 patents)

Masahiro Aoyagi (1 out of 18 patents)

4. Katsuya Kikuchi (1 out of 15 patents)

5. Yoshikuni Okada (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Shinwa Corp. Ltd.. Retrieved from https://idiyas.com/company/shinwa

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]