% Expired Patents = 20.0

EPO Patents = 1

Forward Citations = 33

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12 inventors (with patents filed for the assignee):

Kimihiro Shimono (3 out of 3 patents)

Takahiro Takeda (3 out of 3 patents)

Kazutoshi Teraoka (3 out of 3 patents)

4. Fumihito Kasagi (3 out of 3 patents)

5. Osamu Shiraishi (1 out of 1 patent)

6. Takushi Tamamura (1 out of 1 patent)

7. Toshinori Yasutomi (1 out of 2 patents)

8. Katsuhiko Maeda (1 out of 1 patent)

9. Minoru Okamoto (1 out of 1 patent)

10. Matsuo Ohtaka (1 out of 1 patent)

11. Yasunori Motoi (1 out of 1 patent)

12. Makoto Numazawa (1 out of 2 patents)

5 patents: Sort by Forward Citations

1. 9631869 - Powder supply device and powder supply method (2017-04-25),

2. 9573775 - Powder supply apparatus and powder supply method (2017-02-21),

3. 9296570 - Powder supply device and powder supply method (2016-03-29),

4. 8603339 - Activated sludge material, method for reducing excess sludge production in bioreactor, and method of controlling bioreactor (2013-12-10),

5. 5285735 - Control apparatus for injection quantity of pulverized coal to blast (1994-02-15),

Company Overview

Diamond Engineering Co., Ltd. is a leading provider of engineering solutions for various industries. With a strong focus on quality and innovation, we deliver cutting-edge products and services to our clients. Our team of experienced engineers and technicians ensure that every project is completed to the highest standards of excellence. From design and manufacturing to installation and maintenance, we offer comprehensive solutions to meet our clients' needs. Visit our website to learn more about our services and capabilities.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#31 in Toyama 939-0643

#6,654 in Japan

Toyama, Japan

Diamond Engineering Co., Ltd.

Forward Citations = 33

12 inventors:

Kimihiro Shimono (3 out of 3 patents)

Takahiro Takeda (3 out of 3 patents)

Kazutoshi Teraoka (3 out of 3 patents)

4. Fumihito Kasagi (3 out of 3 patents)

5. Osamu Shiraishi (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Diamond Engineering Co., Ltd.. Retrieved from https://idiyas.com/company/diamond-engineering-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]

1 patent (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]