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).
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Patent number: 12264617Abstract: The present invention relates to a dimethyl ether-fueled (DME-fueled) generator. Since the DME-fueled generator uses DME which is a clean fuel, there is no fine dust in the exhaust gas.Type: GrantFiled: August 25, 2022Date of Patent: April 1, 2025Assignee: BIO FRIENDS INC.Inventors: Wonjun Cho, Jeseol Lee, Youngsoo Lee, Wonaje Cho, Hyejin Yu, Junwoo Lee
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Publication number: 20240352887Abstract: The present invention relates to a dimethyl ether-fueled (DME-fueled) generator. Since the DME-fueled generator uses DME which is a clean fuel, there is no fine dust in the exhaust gas.Type: ApplicationFiled: August 25, 2022Publication date: October 24, 2024Inventors: Wonjun CHO, Jeseol LEE, Youngsoo LEE, Wonaje CHO, Hyejin YU, Junwoo LEE
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Publication number: 20240075442Abstract: 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: ApplicationFiled: March 18, 2022Publication date: March 7, 2024Inventors: Wonjun CHO, Jeseol LEE, Youngsoo LEE, Wonaje CHO, Hyejin YU, Junwoo LEE, Jeongil LEE
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Patent number: 11767810Abstract: 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: GrantFiled: August 29, 2019Date of Patent: September 26, 2023Assignee: BIO FRIENDS INC.Inventors: Wonjun Cho, Hyejin Yu, Youngsoo Lee, Jeseol Lee, Wonjae Cho, Myungkyu Jin, Junwoo Lee
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Publication number: 20220290636Abstract: 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: ApplicationFiled: August 29, 2019Publication date: September 15, 2022Inventors: Wonjun CHO, Hyejin YU, Youngsoo LEE, Jeseol LEE, Wonjae CHO, Myungkyu JIN, Junwoo LEE
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Patent number: 9426784Abstract: 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: GrantFiled: October 7, 2013Date of Patent: August 23, 2016Assignee: Open Invention Network, LLCInventors: 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
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Publication number: 20140302861Abstract: 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: ApplicationFiled: October 7, 2013Publication date: October 9, 2014Applicant: 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
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Patent number: 8560017Abstract: 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: GrantFiled: September 24, 2012Date of Patent: October 15, 2013Assignee: 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
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Publication number: 20130029678Abstract: 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: ApplicationFiled: September 24, 2012Publication date: January 31, 2013Applicant: 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
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Patent number: 8275416Abstract: 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: GrantFiled: May 3, 2012Date of Patent: September 25, 2012Assignee: 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
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Publication number: 20120220306Abstract: 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: ApplicationFiled: May 3, 2012Publication date: August 30, 2012Applicant: 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
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Patent number: 8175647Abstract: 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: GrantFiled: September 27, 2011Date of Patent: May 8, 2012Assignee: 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
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Publication number: 20120015663Abstract: 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: ApplicationFiled: September 27, 2011Publication date: January 19, 2012Applicant: 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
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Patent number: 8060143Abstract: 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: GrantFiled: January 18, 2005Date of Patent: November 15, 2011Assignee: 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
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Publication number: 20050159186Abstract: 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: ApplicationFiled: January 18, 2005Publication date: July 21, 2005Inventors: Wonjun Cho, Jeom Kim, Myoung Choi, Hyunyung Cha, Jefferson Kim, Hyeon Park, Jae Park, Seong Seo, Jae Yoo, Jake Han