% Expired Patents = 14.3

CIPO Patents = 2

EPO Patents = 2

Forward Citations = 90

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5 inventors (with patents filed for the assignee):

Sadao Maeda (6 out of 13 patents)

Tatsuhiro Maeda (1 out of 1 patent)

Isamu Ide (1 out of 9 patents)

4. Toru Seki (1 out of 2 patents)

5. Keizo Nishiyama (1 out of 1 patent)

6. Keizo Nishiyama (0 patent)

7. Keizo Nishiyama (0 patent)

7 patents: Sort by Forward Citations

1. 11154798 - Magnetic filtration apparatus (2021-10-26),

2. 8034267 - Composite solid tire and method of producing same (2011-10-11),

3. 7784524 - Apparatus and method for producing casting mold (2010-08-31),

4. 5145497 - In-line filter device for compressed air having mist filter and air (1992-09-08),

5. 5011519 - In-line filter and trap structure device for compressed air (1991-04-30),

6. 4848989 - In-line filter assembly for compressed air (1989-07-18),

7. 4697481 - Integrally molded hammer with separated head and handle cores (1987-10-06),

Company Overview

Maeda Shell Service Co., Ltd. is a leading provider of automotive services in Japan. With a history of over 50 years, we specialize in oil change services, car maintenance, and repairs. Our highly skilled technicians and state-of-the-art facilities ensure that our customers receive top-notch service and quality products. Visit our website to learn more about our services and locations.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

7 Patents

#8 in Okazaki

#5,459 in Japan

Okazaki, Japan

Maeda Shell Service Co., Ltd.

Forward Citations = 90

5 inventors:

Sadao Maeda (6 out of 13 patents)

Tatsuhiro Maeda (1 out of 1 patent)

Isamu Ide (1 out of 9 patents)

4. Toru Seki (1 out of 2 patents)

5. Keizo Nishiyama (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Maeda Shell Service Co., Ltd.. Retrieved from https://idiyas.com/company/maeda-shell-service-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]

2 patents (CIPO):

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]

2 patents (EPO):

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]