% Expired Patents = 14.3

Forward Citations = 54

Loading Chart...

8 inventors (with patents filed for the assignee):

Sang Kook Han (2 out of 8 patents)

Changgon Lee (2 out of 2 patents)

Hyo Seok Cho (1 out of 1 patent)

4. Hun Sin (1 out of 1 patent)

5. Sangkook Han (1 out of 1 patent)

6. Myong Kyu Choi (1 out of 2 patents)

7. Jae Gyu Jung (1 out of 2 patents)

8. Baek Joo Kang (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. D1077494 - Chair (2025-06-03),

2. 12042060 - Lumbar supporting system of chair and chair having the same (2024-07-23),

3. D980640 - Patterned chair (2023-03-14),

4. D930380 - Chair (2021-09-14),

5. D878793 - Chair (2020-03-24),

6. 9237811 - Chair with improved waist bearing power (2016-01-19),

7. D690523 - Office chair (2013-10-01),

Company Overview

Patra Co., Ltd. is a leading provider of premium skincare products in Japan. With a focus on natural ingredients and innovative formulas, Patra offers a wide range of products including lotions, creams, and serums. The company is dedicated to promoting healthy and glowing skin for all ages and skin types. Visit our website to learn more about our products and skincare solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

7 Patents

#39 in Yongin

#1,435 in South Korea

Yongin, South Korea

Patra Co., Ltd.

Forward Citations = 54

8 inventors:

Sang Kook Han (2 out of 8 patents)

Changgon Lee (2 out of 2 patents)

Hyo Seok Cho (1 out of 1 patent)

4. Hun Sin (1 out of 1 patent)

5. Sangkook Han (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Patra Co., Ltd.. Retrieved from https://idiyas.com/company/patra-company

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]