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% 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),

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Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

7 Patents

#2 in Oyama

#5,441 in Japan

Oyama, Japan

Powdec K.k.