% Expired Patents = 66.7

Forward Citations = 9

Loading Chart...

15 inventors (with patents filed for the assignee):

Atsushi Kajihara (3 out of 3 patents)

Masaki Gotoh (3 out of 4 patents)

Hiroshi Miyajima (3 out of 4 patents)

4. Osamu Niijima (2 out of 2 patents)

5. Ichiro Takahashi (1 out of 30 patents)

6. Takashi Suda (1 out of 1 patent)

7. Tomoaki Sakata (1 out of 1 patent)

8. Jun Ozawa (1 out of 1 patent)

9. Naoyuki Utsumi (1 out of 1 patent)

10. Kento Suzuki (1 out of 17 patents)

11. Takayuki Aoki (1 out of 29 patents)

12. Takashi Masuda (1 out of 1 patent)

13. Kunio Miyauchi (1 out of 3 patents)

14. Makoto Matsumoto (1 out of 20 patents)

15. Yuta Uchiumi (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 11948544 - Musical instrument tuner, musical performance support device and musical instrument management device (2024-04-02),

2. 11094298 - Capo (2021-08-17),

3. 11041433 - Exhaust casing for turbocharger, and method for manufacturing same (2021-06-22),

4. 10971120 - Strap pin fitting (2021-04-06),

5. 7649150 - Sensor having switch function, manufacturing method thereof and electronic device having sensor built therein (2010-01-19),

6. 6860134 - Ironing dies (2005-03-01),

Company Overview

Gunma Prefecture is located in the Kanto region of Japan, famous for its hot springs, ski resorts, and natural beauty. The prefecture is known for producing high-quality silk, ramen noodles, and konjac. Gunma also has a thriving automotive industry, with the headquarters of Subaru Corporation located in Ota City. The area is popular among hikers and outdoor enthusiasts, with Mount Akagi and Mount Haruna offering stunning views and challenging trails. Gunma Prefecture is also home to the UNESCO World Heritage Site of Tomioka Silk Mill, a historic silk mill that played a crucial role in the modernization of Japan's silk industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

6 Patents

#4 in Maebashi

#5,989 in Japan

Maebashi, Japan

Gunma Prefecture

Forward Citations = 9

15 inventors:

Atsushi Kajihara (3 out of 3 patents)

Masaki Gotoh (3 out of 4 patents)

Hiroshi Miyajima (3 out of 4 patents)

4. Osamu Niijima (2 out of 2 patents)

5. Ichiro Takahashi (1 out of 30 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gunma Prefecture. Retrieved from https://idiyas.com/company/gunma-prefecture

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]