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Sursen Corporation

USPTO Granted Patents = 11

% Expired Patents = 100.0

EPO Patents = 2

Trademarks = 2

Forward Citations = 20

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16 inventors (with patents filed for the assignee):

Donglin Wang (11 out of 31 patents)

Changwei Liu (5 out of 6 patents)

Ningsheng Liu (5 out of 6 patents)

4. Kaihong Zou (4 out of 4 patents)

5. Xu Guo (4 out of 6 patents)

6. Haifeng Jiang (3 out of 3 patents)

7. Peng Gao (1 out of 78 patents)

8. Ruihua Wang (1 out of 2 patents)

9. Xiaoging Lu (1 out of 1 patent)

10. Shutian Yin (1 out of 2 patents)

11. Yunming Zhang (1 out of 3 patents)

12. Yuansong Liang (1 out of 2 patents)

13. De Ouyang (1 out of 2 patents)

14. Yongzhi Lou (1 out of 2 patents)

15. Liwei Wang (1 out of 6 patents)

11 patents: Sort by Forward Citations

1. 8806661 - Method and device for distributing electronic documents (2014-08-12),

2. 8756492 - Method and system for processing document on layers (2014-06-17),

3. 8732216 - Docbase management system and method for extending docbase management system and functions (2014-05-20),

4. 8645344 - Document processing system and method therefor (2014-02-04),

5. 8538068 - Embedding and detecting hidden information (2013-09-17),

6. 8464049 - Method and system of accessing copy-prevented encrypted data resources over a network (2013-06-11),

7. 8423521 - Method and apparatus for storing document data in docbase management system (2013-04-16),

8. 8386943 - Method for query based on layout information (2013-02-26),

9. 8386793 - Method and apparatus for implementing electronic seal (2013-02-26),

10. 8316379 - Method for invoking UOML instructions (2012-11-20),

11. 8171389 - Method of hierarchical processing of a document and system therefor (2012-05-01),

Sursen Corporation is a leading provider of innovative solutions in the field of technology and communication. With a focus on delivering high-quality products and services, Sursen has established itself as a trusted partner for clients around the globe. From telecommunications to IT infrastructure, Sursen offers a comprehensive range of solutions to meet the diverse needs of businesses in today's fast-paced world.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

11 Patents

#35 in Tianjin

#2,539 in China

#51,671 in the World

Sursen Corporation

Forward Citations = 20

16 inventors:

Donglin Wang (11 out of 31 patents)

Changwei Liu (5 out of 6 patents)

Ningsheng Liu (5 out of 6 patents)

4. Kaihong Zou (4 out of 4 patents)

5. Xu Guo (4 out of 6 patents)

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