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For the Inventor, By the Inventor

KR

Ktfreetel Co., Ltd


USPTO Granted Patents = 78


Forward Citations = 544

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117 inventors (with patents filed for the assignee):

goldMedal Youn-Ok Park (19 out of 60 patents)

silverMedal Chul-Sik Yoon (15 out of 43 patents)

bronzeMedal Byung-Han Ryu (11 out of 61 patents)

4.  Kun-Min Yeo (11 out of 13 patents)

5.  Jae-Heung Kim (10 out of 42 patents)

6.  Jun-Woo Kim (9 out of 30 patents)

7.  Soon-Yong Lim (9 out of 12 patents)

8.  Nam-Hoon Park (6 out of 19 patents)

9.  Dong-Seung Kwon (5 out of 33 patents)

10.  Yeong-Jin Kim (5 out of 11 patents)

11.  Chang-Wahn Yu (5 out of 12 patents)

12.  Seung-Ku Hwang (5 out of 15 patents)

13.  Young-Ha Lee (4 out of 10 patents)

14.  Jee-Hwan Ahn (4 out of 21 patents)

15.  Su-Chang Chae (4 out of 8 patents)


Core Competencies:
Wireless Communication
OFDMA System
Traffic Encryption
Mobile Instant Messaging
Channel Quality Information
Power Saving Mode
Dynamic Address Allocation
Smart Antenna System
Digital Broadcasting
Multi-Mode Communication
Uplink Data Transmission
QoS-Based Data Transmission

78 patents:

1. 8934448 - Handover method in wireless portable internet system (2015-01-13),
2. 8792415 - Apparatus and method for scheduling of high-speed portable internet system (2014-07-29),
3. 8615218 - Method for requesting, generating and distributing service-specific traffic encryption key in wireless portable internet system, apparatus for the same, and protocol configuration method for the same (2013-12-24),
4. 8588189 - Wireless internet terminal and packet transmission method for improving quality of service (2013-11-19),
5. 8588145 - Method for allocating and accessing radio resources in OFDMA system (2013-11-19),
6. 8462706 - Method for requesting and reporting channel quality information in wireless system and apparatus thereof (2013-06-11),
7. 8406320 - Digital clipping method for a transmitter of an orthogonal frequency division multiple access system (2013-03-26),
8. 8374145 - Method for requesting and reporting channel quality information in wireless portable internet system (2013-02-12),
9. 8194619 - Terminal in wireless communication system and ranging method thereof (2012-06-05),
10. 8185108 - Multi-mode communication system and method thereof (2012-05-22),
11. 8170147 - Apparatus for cancelling DC offset and method thereof (2012-05-01),
12. 8155104 - Method for preamble-based bandwidth request in wireless portable internet system (2012-04-10),
13. 8145257 - Apparatus and method for providing mobile instant messaging service (2012-03-27),
14. 8140054 - Method for authenticating subscriber station, method for configuring protocol thereof, and apparatus thereof in wireless portable internet system (2012-03-20),
15. 8134914 - Subcarrier allocation apparatus and method, subcarrier de-allocation apparatus and method in OFDM system (2012-03-13),
KTFreetel Co., Ltd is a telecommunications company that specializes in providing mobile services and products. With a focus on innovation and customer satisfaction, we aim to deliver top-notch solutions to meet the ever-growing demands of the telecom industry. Our wide range of offerings include mobile phones, data plans, and value-added services. Visit our website to explore our products and learn more about our services.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

78 Patents

#10 in

#223 in South Korea

#9,408 in the World

...
KR

Ktfreetel Co., Ltd

Forward Citations = 544

117 inventors:

goldMedal Youn-Ok Park (19 out of 60 patents)

silverMedal Chul-Sik Yoon (15 out of 43 patents)

bronzeMedal Byung-Han Ryu (11 out of 61 patents)

4.  Kun-Min Yeo (11 out of 13 patents)

5.  Jae-Heung Kim (10 out of 42 patents)

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