Patents by Inventor Wonjun Cho

Wonjun Cho has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • HYDROGEN GENERATOR
    Publication number: 20240075442
    Abstract: The present invention relates to a hydrogen generator, and the purpose of the present invention is to provide a hydrogen generator wherein thermal efficiency is maximized, structural changes according to amounts of production are easily implemented, and DME is used as the main source material.
    Type: Application
    Filed: March 18, 2022
    Publication date: March 7, 2024
    Inventors: Wonjun CHO, Jeseol LEE, Youngsoo LEE, Wonaje CHO, Hyejin YU, Junwoo LEE, Jeongil LEE
  • Trigeneration system using DME
    Patent number: 11767810
    Abstract: The purpose of the present invention is to provide a trigeneration system using dimethyl ether (DME), wherein the system produces electricity, controls heating and cooling, and supplies carbon dioxide as a fertilizer by driving a DME engine by using, as a raw material, DME which is clean fuel. A trigeneration system using DME according to the present invention may comprise: a DME tank in which DME fuel is stored; a DME engine driven by means of the DME fuel as a raw material; a DME fuel supply unit for supplying the DME fuel stored in the DME tank to the DME engine; a treatment unit connected to an exhaust line for discharging exhaust gas from the DME engine, so as to treat harmful components of the exhaust gas; a power generation unit for producing electricity by means of a driving force of the DME engine; and a cooling and heating unit for supplying or collecting heat by means of the driving force of the DME engine.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: September 26, 2023
    Assignee: BIO FRIENDS INC.
    Inventors: Wonjun Cho, Hyejin Yu, Youngsoo Lee, Jeseol Lee, Wonjae Cho, Myungkyu Jin, Junwoo Lee
  • TRIGENERATION SYSTEM USING DME
    Publication number: 20220290636
    Abstract: The purpose of the present invention is to provide a trigeneration system using dimethyl ether (DME), wherein the system produces electricity, controls heating and cooling, and supplies carbon dioxide as a fertilizer by driving a DME engine by using, as a raw material, DME which is clean fuel. A trigeneration system using DME according to the present invention may comprise: a DME tank in which DME fuel is stored; a DME engine driven by means of the DME fuel as a raw material; a DME fuel supply unit for supplying the DME fuel stored in the DME tank to the DME engine; a treatment unit connected to an exhaust line for discharging exhaust gas from the DME engine, so as to treat harmful components of the exhaust gas; a power generation unit for producing electricity by means of a driving force of the DME engine; and a cooling and heating unit for supplying or collecting heat by means of the driving force of the DME engine.
    Type: Application
    Filed: August 29, 2019
    Publication date: September 15, 2022
    Inventors: Wonjun CHO, Hyejin YU, Youngsoo LEE, Jeseol LEE, Wonjae CHO, Myungkyu JIN, Junwoo LEE
  • Combined base transceiver station and base station controller
    Patent number: 9426784
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: August 23, 2016
    Assignee: Open Invention Network, LLC
    Inventors: Wonjun Cho, Joem Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • COMBINED BASE TRANSCEIVER STATION AND BASE STATION CONTROLLER
    Publication number: 20140302861
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Application
    Filed: October 7, 2013
    Publication date: October 9, 2014
    Applicant: UBEEAIRWALK, INC.
    Inventors: Wonjun Cho, Joem Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • Combined base transceiver station and base station controller
    Patent number: 8560017
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: October 15, 2013
    Assignee: Ubeeairwalk, Inc.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • COMBINED BASE TRANSCEIVER STATION AND BASE STATION CONTROLLER
    Publication number: 20130029678
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Application
    Filed: September 24, 2012
    Publication date: January 31, 2013
    Applicant: AIRWALK COMMUNICATIONS, INC.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • Combined base transceiver station and base station controller
    Patent number: 8275416
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: September 25, 2012
    Assignee: Airwalk Communications, Inc.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • COMBINED BASE TRANSCEIVER STATION AND BASE STATION CONTROLLER
    Publication number: 20120220306
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Application
    Filed: May 3, 2012
    Publication date: August 30, 2012
    Applicant: AIRWALK COMMUNICATIONS, INC.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • Combined base transceiver station and base station controller
    Patent number: 8175647
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: May 8, 2012
    Assignee: Airwalk Communications, Inc.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • COMBINED BASE TRANSCEIVER STATION AND BASE STATION CONTROLLER
    Publication number: 20120015663
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Application
    Filed: September 27, 2011
    Publication date: January 19, 2012
    Applicant: AIRWALK COMMUNICATIONS, INC.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • Combined base transceiver station and base station controller
    Patent number: 8060143
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: November 15, 2011
    Assignee: Airwalk Communications, Inc.
    Inventors: Wonjun Cho, Jeom Sik Kim, Myoung Chul Choi, Hyunyung Cha, Jefferson K. Kim, Hyeon Bong Park, Jae Hong Park, Seong Ju Seo, Jae Kyu Yoo, Jake J. Han
  • Combined base transceiver station and base station controller
    Publication number: 20050159186
    Abstract: A combined base station controller (12) and base transceiver station (14) comprises a selector distribution unit (SDU, 20), a main call control (MCC, 22) coupled to the SDU, a radio call control (RCC, 18) coupled to the MCC, and a channel element control (CEC, 16) coupled to the RCC.
    Type: Application
    Filed: January 18, 2005
    Publication date: July 21, 2005
    Inventors: Wonjun Cho, Jeom Kim, Myoung Choi, Hyunyung Cha, Jefferson Kim, Hyeon Park, Jae Park, Seong Seo, Jae Yoo, Jake Han