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For the Inventor, By the Inventor

Daejeon, South Korea

Plasmart Inc.

Calculating rank
USPTO Granted Patents = 8

% Expired Patents = 12.5

Trademarks = 2

Forward Citations = 24

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14 inventors (with patents filed for the assignee):

goldMedal Sang-Won Lee (2 out of 10 patents)

silverMedal Yong-Gwan Lee (2 out of 4 patents)

bronzeMedal Wonoh Lee (2 out of 2 patents)

4.  Sang Won Lee (2 out of 10 patents)

5.  Yong Gwan Lee (2 out of 2 patents)

6.  Jae-Hyun Kim (2 out of 31 patents)

7.  Sae-Hoon Uhm (1 out of 14 patents)

8.  Jaehyun Kim (1 out of 4 patents)

9.  Young-Rok Kim (1 out of 10 patents)

10.  Kyu-Hun Lee (1 out of 1 patent)

11.  Jin-Joong Kim (1 out of 3 patents)

12.  Honghzi Bao (1 out of 2 patents)

13.  Hongzhi Bao (1 out of 1 patent)

14.  Jae Hyun Kim (1 out of 48 patents)


8 patents:

1. 9960011 - Plasma generation apparatus and plasma generation method (2018-05-01),
2. 9736919 - RF power distribution device and RF power distribution method (2017-08-15),
3. 9450559 - Impedance matching device, linear motion module, and radio frequency power supply device (2016-09-20),
4. 9088266 - Impedance matching device, linear motion module, and radio frequency power supply device (2015-07-21),
5. 8884520 - Impedance matching apparatus (2014-11-11),
6. 8567803 - Seat apparatus for a child's ride-on vehicle (2013-10-29),
7. 8466623 - Impedance matching methods and systems performing the same (2013-06-18),
8. D647336 - Seat apparatus for a child's ride-on vehicle (2011-10-25),
Company Overview
Plasmart Inc. is a global toy company that designs and distributes innovative and high-quality toys for children. Their products are known for their creativity, durability, and educational value. Plasmart's mission is to bring joy and learning to children through their engaging and thoughtfully designed toys.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

8 Patents

#79 in Daejeon

#1,305 in South Korea

Daejeon, KR
Daejeon, South Korea

Plasmart Inc.

Forward Citations = 24

14 inventors:

goldMedal Sang-Won Lee (2 out of 10 patents)

silverMedal Yong-Gwan Lee (2 out of 4 patents)

bronzeMedal Wonoh Lee (2 out of 2 patents)

4.  Sang Won Lee (2 out of 10 patents)

5.  Yong Gwan Lee (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Plasmart Inc.. Retrieved from https://idiyas.com/company/plasmart

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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