For the Inventor, By the Inventor

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Keiwa Inc.

USPTO Granted Patents = 65

% Expired Patents = 7.7

EPO Patents = 10

Trademarks = 12

Forward Citations = 161

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39 inventors (with patents filed for the assignee):

Motohiko Okabe (13 out of 25 patents)

Chengheng Tsai (13 out of 13 patents)

Kenichi Harada (11 out of 20 patents)

4. Takahiro Tsuji (11 out of 19 patents)

5. Masayuki Sukigara (7 out of 8 patents)

6. Yoshitada Namikawa (7 out of 7 patents)

7. Yuki Matsuno (6 out of 6 patents)

8. Chengheng Tsai (5 out of 5 patents)

9. Hironori Nakashima (5 out of 5 patents)

10. Akira Furuta (5 out of 20 patents)

11. Tadayoshi Fukuda (4 out of 4 patents)

12. Satoshi Shiba (3 out of 3 patents)

13. Tadayuki Nonaka (3 out of 3 patents)

14. Hirohisa Dejima (2 out of 2 patents)

15. Akira Arakawa (2 out of 2 patents)

Core Competencies:

Backlight Unit

Optical Sheet

Light Diffusion Sheet

Liquid Crystal Display

Display Device

Protective Film

Diffusion Plate

Optical Waveguide

65 patents: Sort by Forward Citations

1. 12742985 - Light diffusion sheet, backlight unit, liquid crystal display apparatus, information device, and method of manufacturing light diffusion sheet (2026-09-22),

2. 12730342 - Optical sheet, backlight unit, liquid crystal display apparatus, and information device (2026-09-08),

3. 12724178 - Light diffusion sheet, backlight unit, liquid crystal display device, information apparatus, and method for manufacturing light diffusion sheet (2026-09-01),

4. 12704752 - Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit (2026-08-11),

5. 12625401 - Light diffusion sheet, back-light unit, liquid crystal display device, information apparatus, and method for manufacturing back-light unit (2026-05-12),

6. 12535706 - Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit (2026-01-27),

7. 12510783 - Light diffusion sheet, backlight unit, liquid crystal display device, and information equipment (2025-12-30),

8. 12393078 - Light diffusion sheet, light diffusion sheet laminate, backlight unit, and liquid crystal display device (2025-08-19),

9. 12371378 - Structure protection sheet, concrete block, and method for manufacturing reinforced structure (2025-07-29),

10. 12345980 - Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit (2025-07-01),

11. 12313935 - Light diffusion sheet, back-light unit, liquid crystal display device, information apparatus, and method for manufacturing back-light unit (2025-05-27),

12. 12292648 - Optical sheet, backlight unit, liquid crystal display device, and information device (2025-05-06),

13. 12197073 - Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit (2025-01-14),

14. 12174489 - Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit (2024-12-24),

15. 12135479 - Optical sheet laminate, backlight unit, liquid crystal display device, information equipment, and production method for backlight unit (2024-11-05),

KEIWA INC. is a global technology company specializing in the development and manufacturing of innovative electronic devices. With a focus on delivering cutting-edge solutions that enhance the way people live, work, and connect, KEIWA INC. has established itself as a leader in the industry. From smartphones and tablets to smart home systems and wearables, our products are designed to seamlessly integrate into the modern lifestyle. With a strong commitment to customer satisfaction and continuous innovation, KEIWA INC. is constantly pushing boundaries to shape the future of technology.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

65 Patents

#156 in Osaka

#1,469 in Japan

#11,305 in the World

Keiwa Inc.

Forward Citations = 161

39 inventors:

Motohiko Okabe (13 out of 25 patents)

Chengheng Tsai (13 out of 13 patents)

Kenichi Harada (11 out of 20 patents)

4. Takahiro Tsuji (11 out of 19 patents)

5. Masayuki Sukigara (7 out of 8 patents)

Please report any incorrect information to [email protected]

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