For the Inventor, By the Inventor

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Hong Kong, China

Kem Hongkong Limited

USPTO Granted Patents = 27

% Expired Patents = 3.7

EPO Patents = 2

Forward Citations = 282

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13 inventors (with patents filed for the assignee):

Ryuta Kuramochi (8 out of 11 patents)

Tetsuo Kondo (5 out of 6 patents)

Satoshi Ogawa (4 out of 7 patents)

4. Hideo Kato (3 out of 20 patents)

5. Qilong Shang (2 out of 2 patents)

6. Eiji Kawamura (1 out of 1 patent)

7. Huawei Lin (1 out of 1 patent)

8. Hideki Motosugi (1 out of 2 patents)

9. Naokazu Suzuki (1 out of 8 patents)

10. Keizo Kumazawa (1 out of 1 patent)

11. Kentaro Yabukoshi (1 out of 1 patent)

12. Fumiaki Miura (1 out of 3 patents)

13. Yoshitaka Taketomi (1 out of 1 patent)

14. Hideya Tajima (2 patents)

Core Competencies:

Hinge Device

Electronic Equipment

Document Cover Closer

Biaxial Hinge

Multiaxial Hinge

Articulated Hinge

Opening Device

Supporting Mechanism

Damper Hinge

Rotary Unit

Terminal Device

Office Equipment

27 patents: Sort by Forward Citations

1. 12477049 - Hinge supporting device and electronic equipment using the same (2025-11-18),

2. 12256509 - Document cover closer and office equipment having the same (2025-03-18),

3. 12146364 - Document cover closer and office equipment having the same (2024-11-19),

4. 11953950 - Articulated hinge device and electronic device using the same (2024-04-09),

5. 11802431 - Document cover closer and office equipment using the same (2023-10-31),

6. 11644874 - Multiaxial hinge device and electronic device using the same (2023-05-09),

7. 11603962 - Supporting mechanism and supporting device having the same (2023-03-14),

8. 11136806 - Opening and closing device for opening and closing body, and various opened and closed bodies having the same (2021-10-05),

9. 11072958 - Damper hinge and western-style toilet using the same (2021-07-27),

10. 10845849 - Parallel biaxial hinge and electronic device (2020-11-24),

11. 10788785 - Document cover closer and office equipment having the same (2020-09-29),

12. 10781621 - Hinge device and office equipment using the same (2020-09-22),

13. 10754285 - Original cover closer and office equipment using the same (2020-08-25),

14. 10429896 - Opening and closing device and terminal device (2019-10-01),

15. 10401914 - Biaxial hinge and terminal device using the same (2019-09-03),

Company Overview

Kem Hongkong Limited is a prominent player in the manufacturing and development of high-quality electronic components and systems. The company specializes in innovative solutions for various industries, including telecommunications, consumer electronics, and industrial applications. With a strong focus on research and development, Kem Hongkong Limited aims to enhance technological advancements and provide reliable products that meet the evolving needs of its global clientele. Its operations are primarily based in Hong Kong, serving a diverse market with cutting-edge technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

27 Patents

#127 in Hong Kong

#1,125 in China

#24,034 in the World

Hong Kong, China

Kem Hongkong Limited

Forward Citations = 282

13 inventors:

Ryuta Kuramochi (8 out of 11 patents)

Tetsuo Kondo (5 out of 6 patents)

Satoshi Ogawa (4 out of 7 patents)

4. Hideo Kato (3 out of 20 patents)

5. Qilong Shang (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kem Hongkong Limited. Retrieved from https://idiyas.com/company/kem-hongkong

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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