% Expired Patents = 14.3

EPO Patents = 1

Forward Citations = 38

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14 inventors (with patents filed for the assignee):

Hiroji Kawai (6 out of 7 patents)

Shuichi Yagi (4 out of 5 patents)

Hironobu Narui (3 out of 4 patents)

4. Koji Okuno (1 out of 41 patents)

5. Daisuke Shinoda (1 out of 7 patents)

6. Shoko Echigoya (1 out of 1 patent)

7. Fumihiko Nakamura (1 out of 1 patent)

8. Souta Matsumoto (1 out of 1 patent)

9. Sankara Narayanan Ekkanath Madathil (1 out of 4 patents)

10. Akira Nakajima (1 out of 2 patents)

11. Yasunobu Sumida (1 out of 1 patent)

12. Eiichi Yamaguchi (1 out of 2 patents)

13. Toshiya Uemura (1 out of 1 patent)

14. Hisao Sato (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 12660232 - Semiconductor element and device (2026-06-16),

2. 12520534 - Normally-off mode polarization super junction GaN-based field effect transistor and electrical equipment (2026-01-06),

3. 12446250 - Normally-off mode polarization super junction GaN-based field effect transistor and electrical equipment (2025-10-14),

4. 10014399 - Hetero-junction bipolar transistor and electric device (2018-07-03),

5. 9991335 - Semiconductor device having a polarization super junction field effect transistor, electric equipment, bidirectional field effect transistor, and mounted structure body having the same (2018-06-05),

6. 8785976 - Polarization super-junction low-loss gallium nitride semiconductor device (2014-07-22),

7. 7368018 - Chemical vapor deposition apparatus (2008-05-06),

Company Overview

Powdec K.k. is a leading provider of innovative powder coating solutions for a wide range of industries. With a focus on quality, reliability, and efficiency, we strive to deliver superior products and services to our clients. Our state-of-the-art technology and experienced team ensure that we meet the highest standards in the industry. Contact us today to learn more about how Powdec K.k. can help with your powder coating needs.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

7 Patents

#2 in Oyama

#5,459 in Japan

Oyama, Japan

Powdec K.k.

Forward Citations = 38

14 inventors:

Hiroji Kawai (6 out of 7 patents)

Shuichi Yagi (4 out of 5 patents)

Hironobu Narui (3 out of 4 patents)

4. Koji Okuno (1 out of 41 patents)

5. Daisuke Shinoda (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Powdec K.k.. Retrieved from https://idiyas.com/company/powdec-k-k

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]