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Anseong, South Korea

Doowon Technical College

USPTO Granted Patents = 13

% Expired Patents = 23.1

EPO Patents = 3

Forward Citations = 20

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33 inventors (with patents filed for the assignee):

Geon Ho Lee (7 out of 7 patents)

Geonho Lee (4 out of 4 patents)

Ki Beom Kim (3 out of 3 patents)

4. Hak Soo Kim (2 out of 2 patents)

5. Ki Jung An (2 out of 2 patents)

6. In Hwe Koo (2 out of 7 patents)

7. Geon-ho Lee (2 out of 4 patents)

8. Tae-jin Lee (2 out of 3 patents)

9. Young-Chang Han (2 out of 3 patents)

10. Yong Ju Lee (2 out of 2 patents)

11. Frank Obrist (1 out of 59 patents)

12. Seung Won Lee (1 out of 5 patents)

13. Ik Seo Park (1 out of 1 patent)

14. Jae Seok Park (1 out of 1 patent)

15. Ki-beom Kim (1 out of 2 patents)

13 patents: Sort by Forward Citations

1. 9551334 - Variable capacity compressor having a control valve with channels (2017-01-24),

2. 9328721 - Variable displacement swash plate type compressor (2016-05-03),

3. 9022061 - Displacement control valve for variable displacement compressor (2015-05-05),

4. 8858197 - Compressor with sensor and valve plate arrangement (2014-10-14),

5. 8671976 - Exhaust check valve of swash plate compressor (2014-03-18),

6. 8550797 - Scroll compressor with improved back pressure force control function (2013-10-08),

7. 8517695 - Variable displacement swash plate type compressor (2013-08-27),

8. 8485803 - Scroll compressor comprising oil separating driving shaft (2013-07-16),

9. 8485794 - Reciprocating compressor with rotary valve (2013-07-16),

10. 8215924 - Oil separating structure of variable displacement compressor (2012-07-10),

11. 8075291 - Scroll compressor improved in function of oil circulation and back pressure control (2011-12-13),

12. 7955141 - Inverter connection terminal with cables attached to parts of the terminal projecting from upper and lower surfaces of a plate (2011-06-07),

13. 7802512 - Assembly structure of drive shaft and swash plate in swash plate type compressor (2010-09-28),

Doowon Technical College aims to provide high quality technical education and training to empower individuals and support their career growth. With a wide range of programs in engineering, technology, and business, we strive to foster skills and knowledge required to thrive in the ever-evolving professional world.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

13 Patents

#4 in Anseong

#872 in South Korea

#44,950 in the World

Anseong, South Korea

Doowon Technical College

Forward Citations = 20

33 inventors:

Geon Ho Lee (7 out of 7 patents)

Geonho Lee (4 out of 4 patents)

Ki Beom Kim (3 out of 3 patents)

4. Hak Soo Kim (2 out of 2 patents)

5. Ki Jung An (2 out of 2 patents)

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