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For the Inventor, By the Inventor

Nagoya, Japan

Nkg Insulators, Ltd.


USPTO Granted Patents = 9

% Expired Patents = 11.1

Forward Citations = 129

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20 inventors (with patents filed for the assignee):

goldMedal Tomonori Takahashi (1 out of 57 patents)

silverMedal Yoshiyuki Kasai (1 out of 40 patents)

bronzeMedal Takahiro Tomita (1 out of 47 patents)

4.  Hiroharu Kobayashi (1 out of 20 patents)

5.  Akinobu Oribe (1 out of 11 patents)

6.  Toshihiro Hirakawa (1 out of 32 patents)

7.  Masashi Ono (1 out of 3 patents)

8.  Hiroshi Furukubo (1 out of 5 patents)

9.  Hirotake Yamada (1 out of 21 patents)

10.  Hiromichi Kobayashi (1 out of 18 patents)

11.  Tomohiro Bogaki (1 out of 1 patent)

12.  Toshihiko Nakagawa (1 out of 1 patent)

13.  Minoru Matsui (1 out of 30 patents)

14.  Yasuo Akitsu (1 out of 8 patents)

15.  Kazuaki Kato (1 out of 5 patents)


9 patents:

1. 10464287 - Porous plate-shaped filler, method for producing same, and heat insulation film (2019-11-05),
2. 7572497 - Honeycomb structure (2009-08-11),
3. 6617059 - Method of forming silicon carbide film on aluminum nitride, film structure and silicon carbide film (2003-09-09),
4. 6614646 - Polarizable electrode for electrical double-layer capacitor (2003-09-02),
5. 5090944 - Magnetic-drive device for rotary machinery (1992-02-25),
6. 5009038 - Automatic chamfering machine (1991-04-23),
7. 4584151 - Method of producing a polycrystalline transparent spinel sintered body (1986-04-22),
8. 4551578 - Ball and socket type suspension insulator (1985-11-05),
9. 4542363 - Open fuse cutout (1985-09-17),
Company Overview
Nkg Insulators, Ltd. is a leading manufacturer and supplier of high-quality insulators for electrical transmission and distribution systems. With a strong focus on innovation and quality, Nkg Insulators, Ltd. has built a reputation for excellence in the industry. Their products are used by utilities and electrical contractors worldwide to ensure reliable and efficient power delivery. Visit their website to learn more about their product offerings and solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

9 Patents

#78 in Nagoya

#4,699 in Japan

Nagoya, JP
Nagoya, Japan

Nkg Insulators, Ltd.

Forward Citations = 129

20 inventors:

goldMedal Tomonori Takahashi (1 out of 57 patents)

silverMedal Yoshiyuki Kasai (1 out of 40 patents)

bronzeMedal Takahiro Tomita (1 out of 47 patents)

4.  Hiroharu Kobayashi (1 out of 20 patents)

5.  Akinobu Oribe (1 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nkg Insulators, Ltd.. Retrieved from https://idiyas.com/company/nkg-insulators

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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