% Expired Patents = 50.0

Forward Citations = 12

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7 inventors (with patents filed for the assignee):

Yoshio Tanabe (3 out of 3 patents)

Nobukazu Koizumi (2 out of 2 patents)

Tadahiro Nishigawa (1 out of 2 patents)

4. Keiichiro Hayashi (1 out of 7 patents)

5. Tsutomu Matsuhira (1 out of 19 patents)

6. Hideaki Adachi (1 out of 2 patents)

7. Tsutomu Yamaoka (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 11466672 - Actuator (2022-10-11),

2. 11450495 - Actuator and actuator manufacturing method (2022-09-20),

3. 11054909 - Tactile sense provision apparatus and a control method (2021-07-06),

4. 7434311 - Printed wiring board manufacturing method (2008-10-14),

5. 7404908 - Printed wiring board manufacturing method (2008-07-29),

6. 7303943 - Method of manufacturing electric device (2007-12-04),

Company Overview

MARUWA Corporation is a Japanese company that specializes in manufacturing and supplying innovative ceramic products. With over 60 years of experience, MARUWA is known for producing high-quality ceramics used in various industries such as electronics, automotive, and healthcare. They offer a wide range of products including ceramic substrates, fine ceramics, and piezoelectric components. As a global leader in the ceramic industry, MARUWA strives to contribute to technological advancements and provide excellent customer satisfaction.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

6 Patents

#1 in Osaki

#5,988 in Japan

Osaki, Japan

Maruwa Corporation

Forward Citations = 12

7 inventors:

Yoshio Tanabe (3 out of 3 patents)

Nobukazu Koizumi (2 out of 2 patents)

Tadahiro Nishigawa (1 out of 2 patents)

4. Keiichiro Hayashi (1 out of 7 patents)

5. Tsutomu Matsuhira (1 out of 19 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Maruwa Corporation. Retrieved from https://idiyas.com/company/maruwa

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]