Patents by Inventor Chang Keun Seo
Chang Keun Seo 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: 10649379Abstract: A customer replacement unit monitor (CRUM) unit that can be mounted in an image forming apparatus includes a decoder which receives first clock signals from the image forming apparatus and converts the first clock signals into second clock signals, a memory which stores data related with a consumable unit, and a controller which manages the memory based on data signals transmitted from the image forming apparatus and the second clock signals. The first clock signals are divided into a data section in which the data signals are transmitted and received and an idle section in which the data signals are not transmitted and received. The first clock signals have a first frequency on the data section while having a second frequency on the idle section, and the second clock signals are clock signals maintaining a high value or a low value on the idle section.Type: GrantFiled: April 19, 2017Date of Patent: May 12, 2020Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Chang-keun Seo, Jin-boo Kim, Youn-jae Kim
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Publication number: 20170219975Abstract: A customer replacement unit monitor (CRUM) unit that can be mounted in an image forming apparatus includes a decoder which receives first clock signals from the image forming apparatus and converts the first clock signals into second clock signals, a memory which stores data related with a consumable unit, and a controller which manages the memory based on data signals transmitted from the image forming apparatus and the second clock signals. The first clock signals are divided into a data section in which the data signals are transmitted and received and an idle section in which the data signals are not transmitted and received. The first clock signals have a first frequency on the data section while having a second frequency on the idle section, and the second clock signals are clock signals maintaining a high value or a low value on the idle section.Type: ApplicationFiled: April 19, 2017Publication date: August 3, 2017Applicant: S-Printing Solution Co., LTD.Inventors: Chang-keun SEO, Jin-boo KIM, Youn-jae KIM
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Patent number: 9658644Abstract: A customer replacement unit monitor (CRUM) unit that can be mounted in an image forming apparatus includes a decoder which receives first clock signals from the image forming apparatus and converts the first clock signals into second clock signals, a memory which stores data related with a consumable unit, and a controller which manages the memory based on data signals transmitted from the image forming apparatus and the second clock signals. The first clock signals are divided into a data section in which the data signals are transmitted and received and an idle section in which the data signals are not transmitted and received. The first clock signals have a first frequency on the data section while having a second frequency on the idle section, and the second clock signals are clock signals maintaining a high value or a low value on the idle section.Type: GrantFiled: February 20, 2015Date of Patent: May 23, 2017Assignee: S-PRINTING SOLUTION CO., LTD.Inventors: Chang-keun Seo, Jin-boo Kim, Youn-jae Kim
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Publication number: 20160098060Abstract: A customer replacement unit monitor (CRUM) unit that can be mounted in an image forming apparatus includes a decoder which receives first clock signals from the image forming apparatus and converts the first clock signals into second clock signals, a memory which stores data related with a consumable unit, and a controller which manages the memory based on data signals transmitted from the image forming apparatus and the second clock signals. The first clock signals are divided into a data section in which the data signals are transmitted and received and an idle section in which the data signals are not transmitted and received. The first clock signals have a first frequency on the data section while having a second frequency on the idle section, and the second clock signals are clock signals maintaining a high value or a low value on the idle section.Type: ApplicationFiled: February 20, 2015Publication date: April 7, 2016Applicant: Samsung Electronics Co., Ltd.Inventors: Chang-keun SEO, Jin-boo Kim, Youn-jae Kim
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Publication number: 20090046680Abstract: A station transmit data to another station positioned outside its regulatory maximum transmit power via an access point according to a method defined in an infrastructure mode and directly transmit data to another positioned within a range of its regulatory maximum transmit power according to a method defined in a direct transmission mode.Type: ApplicationFiled: June 10, 2008Publication date: February 19, 2009Applicant: Samsung Electronics Co., LtdInventor: Chang Keun SEO
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Patent number: 6950659Abstract: A method of allocating a radio resource for a traffic burst is disclosed. The method includes the steps of selecting at least one cell having a pilot signal strength that is greater than a pilot signal strength of a primary cell, requesting a communication resource reservation to the selected cells, receiving results of reservation performed according to the reservation request from the selected cells, and requesting allocation of the communication resource to the cells that secure a maximum data rate by analyzing the results of reservation.Type: GrantFiled: October 15, 2002Date of Patent: September 27, 2005Assignee: LG Electronics Inc.Inventor: Chang Keun Seo
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Patent number: 6581176Abstract: In a method for transmitting radio link protocol frames in a mobile radio communication system, if an error occurs on a radio section when user data frames of a radio link protocol (RLP) having respective different series numbers are transferred from a transmitting station to a receiving station, at least one missed user data frame is caused at the receiving station. At this time, the receiving station transmits, repeatedly by first times, a negative acknowledgement (NAK) control frame of the RLP for at least one missed user data frame, to the transmitting station. The transmitting station sends, by second times different from the first times, at least one missed user data frame in response to the received NAK control frame, to the receiving station.Type: GrantFiled: December 31, 1998Date of Patent: June 17, 2003Assignee: LG Information & Communications, Ltd.Inventor: Chang Keun Seo
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Publication number: 20030078046Abstract: A method of allocating a radio resource for a traffic burst is disclosed. The method includes the steps of selecting at least one cell having a pilot signal strength that is greater than a pilot signal strength of a primary cell, requesting a communication resource reservation to the selected cells, receiving results of reservation performed according to the reservation request from the selected cells, and requesting allocation of the communication resource to the cells that secure a maximum data rate by analyzing the results of reservation.Type: ApplicationFiled: October 15, 2002Publication date: April 24, 2003Applicant: LG Electronics Inc.Inventor: Chang Keun Seo
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Patent number: 6469993Abstract: Method for controlling a traffic load in a mobile communication system, including the steps of (1) providing dynamic priority group numbers(P_DPROTG) which will be made available depending on a traffic load to each terminal which has a predefined priority in a cell, the dynamic priority group numbers(P_DPROTG) being provided in a system, (2) transmitting a permitted dynamic priority group number(P-DPROTG) from the system to each terminal in fixed time intervals depending on the traffic load, (3) each terminal calculating a dynamic priority(DRPOT) of the terminal, (4) each terminal comparing the P_DPROTG from the system and the DPROT calculated by the terminal itself, to determine a dynamic priority group number to which the terminal belongs, and (5) according to a result of the determination in the step (4), each terminal determining, and executing a user data transmission to the system.Type: GrantFiled: December 31, 1998Date of Patent: October 22, 2002Assignee: LG Information & Communications, Ltd.Inventors: Chang Keun Seo, Cheol Kyun Heo
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Patent number: 6463044Abstract: An apparatus and method for controlling the traffic load of a base station in a mobile communication system. The base station dynamically manages the state transitions of the mobile stations according the amount of traffic load carried by the base station. Also. the base station distinguishes and compensates for the different service requirements of a voice service and a data packet service, thereby providing an efficient and high quality communication service.Type: GrantFiled: December 4, 1998Date of Patent: October 8, 2002Assignee: LG Information & Communications, Ltd.Inventor: Chang Keun Seo
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Patent number: 6452911Abstract: A method of allocating vocoders during a simultaneous transfer of voice and data frames in a mobile communication system includes allocating a separate vocoder for processing the voice frame and the data frame. When a mobile communication receives a multiple requests for a simultaneous transfer of voice and data frames, the data frames are multiplexed and allocated to a single vocoder. Thus, the availability of the vocoder resources can be significantly increased.Type: GrantFiled: August 27, 1998Date of Patent: September 17, 2002Assignee: LG Information & Communications, Ltd.Inventor: Chang Keun Seo
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Publication number: 20010021652Abstract: Data service communication system, and method for making data service in the communication system are suggested. A particular service option is defined in advance for a fast data service between CDMA mobile stations belonging the same network. When an origination mobile station requests a call for the data service according to the particular service option, an MSC sets up a data traffic path between the origination mobile station and the destination mobile station according to the service request. A data is transmitted between the origination mobile station and the destination mobile station through the set up data traffic path. Accordingly, a load on the MSC is reduced and a fast data service can be made because the data service is made between the mobile stations within the same network without the IWF.Type: ApplicationFiled: March 12, 2001Publication date: September 13, 2001Applicant: LG Electronics Inc.Inventors: Hyo Sik Jeon, Chang Keun Seo