Lee; Dong Hahk

Patent Applications and Registrations

Patent applications and USPTO patent grants for Lee; Dong Hahk.The latest application filed is for "mathematics education service system, service method thereof, apparatus for analyzing and generating mathematical problems, and method thereof".

Company Profile

0.15.21

Lee; Dong Hahk - Seoul KR
Lee; Dong Hahk - Gyeonggi-do N/A KR
Lee; Dong Hahk - Sungnam-si KR
Lee, Dong-Hahk - Seongnam-si KR
Lee, Dong-Hahk - Korea KR

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Method for extracting semantic distance from mathematical sentences and classifying mathematical sentences by semantic distance, device therefor, and computer readable recording medium Grant 9,424,251 - Park , et al. August 23, 2	2016-08-23
Method and device for inputting equation Grant 9,372,828 - Choe , et al. June 21, 2	2016-06-21
Mathematics Education Service System, Service Method Thereof, Apparatus For Analyzing And Generating Mathematical Problems, And Method Thereof App 20130295537 - PARK; Keun Tae ; et al.	2013-11-07
Method And Device For Inputting Equation App 20130290390 - Choe; Seung Lock ; et al.	2013-10-31
Method For Extracting Semantic Distance From Mathematical Sentences And Classifying Mathematical Sentences By Semantic Distance, Device Therefor, And Computer Readable Recording Medium App 20130275122 - Park; Keun Tae ; et al.	2013-10-17
Method For Processing Natural Language And Mathematical Formula And Apparatus Therefor App 20130268263 - PARK; Yong Gil ; et al.	2013-10-10
Apparatus And Method For Diagnosing Learning Ability App 20130260359 - Park; Keun Tae ; et al.	2013-10-03
Chip equalization apparatus and method thereof Grant 8,442,102 - Lee , et al. May 14, 2	2013-05-14
System, server and method for providing supplementary information service related to broadcast content Grant 8,407,741 - Lee , et al. March 26, 2	2013-03-26
System and method for synchroning broadcast content with supplementary information Grant 8,341,671 - Lee , et al. December 25, 2	2012-12-25
Method and system for estimating adaptive combined channel in CDMA system based on time division duplex system Grant 8,320,353 - Lee , et al. November 27, 2	2012-11-27
Controlling method and data call handover method for dual band/dual mode mobile communication terminal Grant 8,072,940 - Park , et al. December 6, 2	2011-12-06
System, Server And Method For Providing Supplementary Information Service Related To Broadcast Content App 20100325667 - Lee; Goon Seop ; et al.	2010-12-23
Method And System For Estimating Adaptive Combined Channel In Cdma System Based On Time Division Duplex System App 20100322116 - Lee; Dong-Hahk ; et al.	2010-12-23
System And Method For Synchroning Broadcast Content With Supplementary Information App 20100295992 - Lee; Goon Seop ; et al.	2010-11-25
Route determining method in a multi protocol label switching network Grant 7,697,437 - Shin , et al. April 13, 2	2010-04-13
Chip Equalization Apparatus And Method Thereof App 20100068989 - Lee; Goon Seop ; et al.	2010-03-18
Roaming method between wireless local area network and cellular network Grant 7,519,363 - Shin , et al. April 14, 2	2009-04-14
Method of routing point-to-multipoint traffic on an MPLS network Grant 7,394,772 - Shin , et al. July 1, 2	2008-07-01
Method And Apparatus For Hierarchical Modulation And Demodulation In Digital Broadcasting System App 20080137775 - KIM; Tae Hoon ; et al.	2008-06-12
Controlling Method And Data Call Handover Method For Dual Band/Dual Mode Mobile Communication Terminal App 20080117874 - Park; Seong-Soo ; et al.	2008-05-22
Method of Switching Multi-Mode Multi-Ban Mobile Communication Terminal in Multi Access Communication Nerwork App 20080049673 - Park; Seong-Soo ; et al.	2008-02-28
Apparatus and method for deciding access system based on WLAN signal strength in WLAN/mobile network interworking system, and mobile terminal therefor Grant 7,324,478 - Park , et al. January 29, 2	2008-01-29
Receiver of an orthogonal frequency division multiplexing system Grant 7,099,397 - Lee , et al. August 29, 2	2006-08-29
Roaming method between wireless local area network and cellular network App 20060013170 - Shin; Yong-Sik ; et al.	2006-01-19
Authentication system and method having mobility in public wireless local area network App 20050286489 - Shin, Yonk-Sik ; et al.	2005-12-29
Method for selecting system and transmitting data for WLAN and mobile phone network interworking service App 20040047323 - Park, Seong-Soo ; et al.	2004-03-11
Apparatus and method for deciding access system based on WLAN signal strength in WLAN/mobile network interworking system, and mobile terminal therefor App 20040044887 - Park, Seong-Soo ; et al.	2004-03-04
Method of routing point-to-multipoint traffic on an MPLS network App 20030099235 - Shin, Yong Sik ; et al.	2003-05-29
Receiver of an orthogonal frequency division multiplexing system App 20030058953 - Lee, Goon Seop ; et al.	2003-03-27
Route determining method in a multi protocol label switching network App 20030002444 - Shin, Yong Sik ; et al.	2003-01-02

uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.

While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.

All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.