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For the Inventor, By the Inventor

Owariasahi, Japan

Maruwa Co., Ltd.

Calculating rank
USPTO Granted Patents = 14

% Expired Patents = 14.3


Trademarks = 1

Forward Citations = 27

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21 inventors (with patents filed for the assignee):

goldMedal Ikuo Nishi (4 out of 4 patents)

silverMedal Sei Kanbe (3 out of 3 patents)

bronzeMedal Daisuke Kato (2 out of 2 patents)

4.  Mitsutaka Takahashi (2 out of 2 patents)

5.  Fumiya Kobayashi (2 out of 7 patents)

6.  Toshiro Kanbe (2 out of 2 patents)

7.  Tsutomu Amano (2 out of 2 patents)

8.  Yoshinori Izukura (2 out of 2 patents)

9.  Tadashi Onishi (1 out of 7 patents)

10.  Fuyuki Ito (1 out of 1 patent)

11.  Genki Hirashima (1 out of 1 patent)

12.  Kazuhiro Ushita (1 out of 1 patent)

13.  Tomonori Ishigaki (1 out of 1 patent)

14.  Yasushi Kojima (1 out of 1 patent)

15.  Sho Kumagai (1 out of 6 patents)


14 patents:

1. 12113290 - Crossed-dipole antenna (2024-10-08),
2. 11643368 - Ceramic device (2023-05-09),
3. 11358865 - Spherical aluminum nitride powder and method for producing spherical aluminum nitride powder (2022-06-14),
4. 11319254 - Aluminum nitride sintered body and method for producing same (2022-05-03),
5. 10460965 - Susceptor (2019-10-29),
6. 10287685 - Susceptor (2019-05-14),
7. 8859072 - Cut-out sintered ceramic sheet and method of manufacturing the same (2014-10-14),
8. 8747590 - Cut-out sintered ceramic sheet and method of manufacturing the same (2014-06-10),
9. 8747589 - Cut-out sintered ceramic sheet and method of manufacturing the same (2014-06-10),
10. 8614648 - Antenna module, magnetic material sheet and double-sided adhesive spacer, and methods for the manufacture thereof (2013-12-24),
11. 8323776 - Composite ferrite sheet, method of fabricating the composite ferrite sheet, and array of sintered ferrite segments used to form the composite ferrite sheet (2012-12-04),
12. D671511 - Surface-mounted coil (2012-11-27),
13. D671510 - Surface-mounted coil (2012-11-27),
14. 5985442 - Functional mat and its manufacturing method (1999-11-16),
Company Overview
Maruwa Co., Ltd. is a prominent manufacturer based in Owariasahi, Japan, specializing in advanced ceramic materials and components. The company focuses on the development of high-performance products for various industries, including electronics, automotive, and telecommunications. Maruwa is recognized for its expertise in producing substrates, capacitors, and other essential components that enhance the functionality and reliability of electronic devices. With a commitment to innovation, Maruwa continues to advance its research in materials science and engineering.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

14 Patents

#1 in Owariasahi

#3,585 in Japan

#42,312 in the World

Owariasahi, JP
Owariasahi, Japan

Maruwa Co., Ltd.

Forward Citations = 27

21 inventors:

goldMedal Ikuo Nishi (4 out of 4 patents)

silverMedal Sei Kanbe (3 out of 3 patents)

bronzeMedal Daisuke Kato (2 out of 2 patents)

4.  Mitsutaka Takahashi (2 out of 2 patents)

5.  Fumiya Kobayashi (2 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Maruwa Co., Ltd.. Retrieved from https://idiyas.com/company/maruwa-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]
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