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Koha Co., Ltd.

USPTO Granted Patents = 37

% Expired Patents = 48.6

EPO Patents = 10

Forward Citations = 393

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49 inventors (with patents filed for the assignee):

Kazuo Aoki (13 out of 62 patents)

Encarnacion Antonia Garcia Villora (13 out of 28 patents)

Kiyoshi Shimamura (13 out of 35 patents)

4. Noboru Ichinose (9 out of 28 patents)

5. Yukio Kaneko (7 out of 39 patents)

6. Shinya Watanabe (6 out of 89 patents)

7. Takekazu Masui (6 out of 6 patents)

8. Kimiyoshi Koshi (6 out of 6 patents)

9. Kazuyuki Iizuka (6 out of 20 patents)

10. Masaru Takizawa (4 out of 12 patents)

11. Daisuke Inomata (4 out of 16 patents)

12. Hideaki Kato (4 out of 34 patents)

13. Yu Yamaoka (4 out of 4 patents)

14. Kanae Matsumura (4 out of 11 patents)

15. Shunsuke Ohtsuka (4 out of 6 patents)

37 patents: Sort by Forward Citations

1. 10975497 - Light emitting device (2021-04-13),

2. 10836961 - Phosphor, method for manufacturing same, and light-emitting device (2020-11-17),

3. 10526721 - Method for growing β-GAO-based single crystal (2020-01-07),

4. 10340429 - Light emitting device (2019-07-02),

5. 10196756 - β-Ga2O3 single-crystal substrate (2019-02-05),

6. 9926647 - [object Object] (2018-03-27),

7. 9926646 - Method for growing B-Ga2O3-based single crystal (2018-03-27),

8. 9915010 - [object Object] (2018-03-13),

9. 9915009 - Method for growing beta-Ga2O3-based single crystal, and beta-Ga2O3-based single crystal substrate and method for producing same (2018-03-13),

10. 9634216 - Light emitting device (2017-04-25),

11. 9431489 - β-Ga2O3-based single crystal substrate (2016-08-30),

12. 9349915 - [object Object] (2016-05-24),

13. 9169980 - Lighting device and display device (2015-10-27),

14. 9166127 - Light source module (2015-10-20),

15. 9153648 - Semiconductor stacked body, method for manufacturing same, and semiconductor element (2015-10-06),

Koha Co., Ltd. is a leading technology company specializing in innovative solutions for businesses. With a vision to empower organizations through cutting-edge software and services, Koha provides a wide range of products including enterprise software, cloud-based solutions, and IT consultancy. Our team of experts is dedicated to delivering high-quality and custom-tailored solutions that help businesses thrive in the digital age. Visit our website to learn more about our offerings and how we can assist your organization in achieving its goals.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

37 Patents

#963 in Tokyo

#2,052 in Japan

#18,238 in the World

Koha Co., Ltd.

Forward Citations = 393

49 inventors:

Kazuo Aoki (13 out of 62 patents)

Encarnacion Antonia Garcia Villora (13 out of 28 patents)

Kiyoshi Shimamura (13 out of 35 patents)

4. Noboru Ichinose (9 out of 28 patents)

5. Yukio Kaneko (7 out of 39 patents)

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