baber/WOPTO huggingface dataset:
Patent KR-20120022437-A (KR)
Title: Method and apparatus for displaying items
Inventor: KIM JIN YONG
IPC: G06F3/048
Filed: 2010-09-02
Abstract: PURPOSE: An item display method and apparatus thereof are provided to enable a user to easily find items by displaying the items according to the gesture of a user. CONSTITUTION: A screen displays an item included in a first category and a tab which represents the first and a second category(210). The gesture of a user is accepted by the screen(220). The gesture is displayed as the item included in the first or the second category by selecting the tab(240). When the gesture is a scroll gesture, the item included in the second category is displayed next to the item included in the first category(260).
Patent KR-20110029085-A (KR)
Title: Semiconductor light emitting device and manufacturing method thereof
Inventor: TANAKA SATOSHI
IPC: H01L33/36
Filed: 2010-09-08
Abstract: PURPOSE: A semiconductor light emitting apparatus and a manufacturing method thereof are provided to improve the light extraction efficiency by selecting the electrode material with the consideration of the light reflection rate. CONSTITUTION: A first electrode is formed on a semiconductor layer(11). A second electrode is formed on a second semiconductor layer(13). The second electrode comprises a lower layer and an upper layer. A light penetration electrode(20) covers up the second semiconductor layer and the second electrode. A light-emitting layer(12) is formed between the semiconductor layer and the second semiconductor layer.
Patent KR-20120026697-A (KR)
Title: 저금 유도 저금통
Inventor: JIN KI CHAN
IPC: A45C1/12
Filed: 2010-09-10
Abstract: 본 발명은 투입구와 투출구가 구성된 저금통에 저금 유도장치를 구비하여 저금을 유도하는 저금통에 관한 것으로, 상기 저금 유도장치는 상기 투입구를 통해 동전 또는 지폐가 투입되는지를 감지하는 감지부; 상기 투입구를 통해 저금해야 할 시간을 알려주는 멘트와 저금 시간을 저장하는 저장부; 상기 감지부를 통해 동전 또는 지폐의 투입 시간으로부터 추후 저금 시간을 카운터하는 카운터부; 상기 저장부에 저장된 저금 시간이 도래하면 저금 시간을 알리는 멘트를 음향출력부, 상기 감지부, 저장부, 카운터부 및 음향출력부의 기능을 제어하는 제어부를 포함하여, 일정 시간 동안 저금통의 투입구를 통해 저금이 이루어지지 않으면 저금 시간을 알려주어 저금을 적극적으로 유도함으로써 평상시뿐만 아니라 일정 시간마다 계획성 있게 저축을 유도할 수 있다.
Patent KR-20110033042-A (KR)
Title: Rod-type polysilicon having improved breaking properties
Inventor: SOFIN MIKHAIL
IPC: C23C16/24
Filed: 2010-09-15
Abstract: PURPOSE: Rod-shaped polycrystalline silicon is provided to reduce the rate of small fractions with the size smaller than 10mm less than 2%, and to prevent the surface of fractured target materials from being contaminated by tungsten. CONSTITUTION: Rod-shaped polycrystalline silicon is obtained by evaporating silicon contained gas using a siemens method. The diameter of the rod-shaped polycrystalline silicon is greater than 100mm. The -shaped polycrystalline silicon contacts with hydrogen at the end of an evaporation process by being cooled inside a reactor.
Patent KR-20120029262-A (KR)
Title: Apparatus for supplying agricultural water containing micro-nano bubbles
Inventor: PARK SEUNG WOO
IPC: C02F1/78
Filed: 2010-09-16
Abstract: PURPOSE: A feeder for agricultural water containing ultrafine bubbles is provided to enable users to produce eco-friendly agricultural products using the agricultural water. CONSTITUTION: A feeder for agricultural water containing ultrafine bubbles comprises the following: an agricultural water inlet unit(1) inflowing the agricultural water into the feeder; an inflow pump(2) for inflowing the agricultural water into the feeder; an inflow pipe(3) flowing the agricultural water inserted by the inflow pump; a filter(4) removing suspended materials from the agricultural water; an additive supplier(10) injecting additives into the agricultural water; an additive storage tank(11) for storing the additives; an additive controlling pump(12) for adjusting the amount of the additives; an additive inflow pipe(13) transferring the additives to the agricultural water inlet unit; and an ultrafine bubble generator(20) generating the ultrafine bubbles in the agricultural water.
Patent KR-20120030286-A (KR)
Title: Red phosphor, method for preparing the same, light emitting device comprising the red phosphor
Inventor: KIM DO HWAN
IPC: C09K11/64
Filed: 2010-09-20
Abstract: PURPOSE: Red phosphors are provided to have high luminance, thermally and chemically excellent stability, and to manufacture a light emitting device having high reliability and high power. CONSTITUTION: Red phosphors are in chemical formula: A_z(Sr, M)2(Si, Al)O_(4-x)N_y:R(0<x<3, y=2x/3, 0.001<z<0.1). In chemical formula, A is at least one kind of element selected from a group consisting of Li, K and Na, M is at least one element selected from a group consisting of Ba, Mg and Ca. R is at least one element selected from a group consisting of lanthanum atoms and transition atoms. The red phosphors have emission peaks of the wavelength of 600-700 nm by blue light or UV wavelength as excitation source.
Patent KR-20120031620-A (KR)
Inventor: SHIN HYUN GUEN
IPC: G06Q20/00
Filed: 2010-09-27
Abstract: PURPOSE: A notification bill management method through an information communication apparatus and system thereof are provided to improve the convenience of a user by interlocking accounts through an authentication certificate. CONSTITUTION: A charge is notified and received by using an information communication apparatus(S1). The notified charge is paid through an interlocked account(S2). The notification of the charge is confirmed(S11). The charges are classified by a deadline by enabling the user of the information communication apparatus to determine one or more days for monthly payment according to an account state(S12).
Patent KR-20120032633-A (KR)
Title: Container for molten droplet of ice cream
Inventor: CHA YE NA
IPC: A23G9/00
Filed: 2010-09-29
Abstract: PURPOSE: A container for molten droplets of ice cream capable of preventing the ice cream from sticking to hands of an eater is provided to reduce the inconvenience of stickiness when eating the ice cream. CONSTITUTION: A container(200) for molten droplets of ice cream comprises the following: an upper opening for passing through the ice cream(110), located on the upper side of the container; and a smaller lower opening for passing through a handle(120) the ice cream, formed on the lower side of the container for preventing the passing through of the ice cream.
Patent KR-20120035071-A (KR)
Inventor: LEE SANG KYUNG
IPC: H04N13/00
Filed: 2010-10-04
Abstract: PURPOSE: A device for attenuating the stereoscopic effect of a stereoscopic image and a method thereof are provided to attenuate the stereoscopic effect of an object when the object is displayed by overlapping the edge of a display screen. CONSTITUTION: When a stereoscopic image is generated by a graphic processing unit(130), a control unit(100) extracts a target object for attenuating the stereoscopic effect from at least one or more objects. The control unit calculates an attenuation degree of stereoscopic effect corresponding to at least one or more object locations. The control unit applies the calculated attenuation degree of stereoscopic effect to an extracted object by the control of a stereoscopic effect attenuating unit(150).
Patent KR-20120048055-A (KR)
Title: Cooling water heating apparatus for fuel cell having bypass structure and fuel cell system having the same
Inventor: KIM SEONG KYUN
IPC: H01M8/04
Filed: 2010-11-05
Abstract: PURPOSE: A coolant heating device for fuel cell is provided to quickly rise stack temperature without decrease of calorie supplied to a fuel cell stack, to reduce coolant flow resistance, to reduce pump consumption power, and to improve system efficiency. CONSTITUTION: A coolant heating device having bypass structure comprises: a heater(110) in which a heating element for heating coolant is equipped; a flow channel part(120), in which a bypass flow channel for exhausting coolant inflowed from a coolant line in upper side by bypassing in order not to pass the heating part, is formed; a bypass valve(130), which is equipped in the flow channel part, for controlling flow direction of coolant between a flow channel near a heating part, and a bypass flow channel; and a valve actuator(140) by being combined to one body for driving the bypass valve.
Patent KR-20120048215-A (KR)
Inventor: RHEE JAE YONG
IPC: E02D29/045
Filed: 2010-11-05
Abstract: 본 발명은 파형강판용 누수 차단 가스켓에 관한 것으로서, 특히 가장자리에 관통공의 열이 형성되고, 상기 관통공에 볼트와 너트가 체결되는  파형강판의 가장자리중 직각이 이루어지는 2개의 가장자리에 관통공을 따라 부착되는 가스켓에 있어서, 상기 가스켓은 물접촉 팽창성 수지 재질로 직사각 판형태로 형성되는 물접촉 팽창성 수지 시트와; 상기 물접촉 팽창성 수지 시트와 동일 형상으로 합성 수지 재질로 형성되고, 상기 물접촉 팽창성 수지 시트의 상면에 접착되며, 저면에 접착층이 형성되는 합성 수지 시트로 이루어지는 것을 특징으로 한다. 
상기와 같은 본 발명에 따르면 물접촉 팽창성 수지 시트와 합성 수지 시트를 2층 이상 상호 부착하여 가스켓을 제작함으로써 누수 능력을 상대적으로 향상시킬 수 있고, 합성 수지 시트에 다수의 홀을 형성하여 압축력을 증대시킴과 동시에 홀을 통해 물접촉 팽창성 수지 시트로 물이 유도되도록 하여 물접촉 팽창성 수지 시트가 신속하게 팽창되어 누수를 차단할 수 있으며, 합성 수지 시트의 양측 모서리에 각각 경사면을 형성하여 물접촉 팽창성 수지 시트의 팽창시 팽창 공간을 제공함으로써 물접촉 팽창성 수지 시트와 합성 수지 시트의 기밀력을 증대시킬 수 있다.
Patent KR-20120048778-A (KR)
Title: Scenting device comprising metal
Inventor: SONG BYUNG HEE
IPC: B65D47/06
Filed: 2010-11-08
Abstract: PURPOSE: A fragrance emitting metal container is provided to be efficiently used as a material of dolls and accessories. CONSTITUTION: A fragrance emitting metal container comprises a fragrant material cover(110), a fragrant material(120), an upper main body(130), an aromatic agent cover(140), a lower main body(150), a connecting member, and a wick. In the container main body, the upper main body and lower main body are combined with each other and forms a space part. The fragrant material is made of a porous material and emits flavor. The fragrant material cover fixes the fragrant material by using an O-ring and provides a flavor discharge path. The wick is fixed in a central hole. The connecting member protects the wick as a support.
Patent KR-20120050580-A (KR)
Title: Mat transformed into castle
Inventor: SONG SEONG JIN
IPC: A47C27/00
Filed: 2010-11-11
Abstract: PURPOSE: A multi-stage mat transformable to a castle is provided to enable users to change the shape of the mat into a castle shape for playing by standing the mat. CONSTITUTION: A transformable multi-stage mat transformable to a castle includes a multi-stage mat main body(10), and a connection member(20). The multi-stage mat main body includes plural mat members connected to each other to be overlapped into multiple stages. A square concavo-convex unit is continuously formed on the upper edge of the multi-stage mat main body. The connection member is interconnected to the side surface of an outermost mat member. One of the mat members includes a rotatably attached opening-closing door.
Patent KR-20120051207-A (KR)
Title: Deck fastener and fixed structure of deck
Inventor: KIM IN HWAN
IPC: E04B1/00
Filed: 2010-11-12
Abstract: PURPOSE: A wood deck clip and a fixing structure for a wood deck using the same are provided to absorb impact, vibration, and movement applied to a deck so that pedestrians can be feel comfortable. CONSTITUTION: A wood deck clip(30) comprises a wing part(31), a projection part(33), and a corner bent part(34). The wing part is formed that both sides of a plate member is roundly bent into a reverse C-shape, and forms a space(32) between the top surface(31a) and the bottom surface(31b). The end of the bottom surface of the wing part is downwardly bent so that the projection part can be vertically formed. The projection part is located between adjacent wood decks in joining. Both longitudinal ends of the projection part are outwardly bent to form the corner bent part. The corner bent part is tightened to the side surface of the wood deck in joining.
Patent KR-20120051284-A (KR)
Title: Promotion of nitrogen mineralization of organic fertilizers and control of plant diseases using bacillus velezensis krict934
Inventor: KIM JIN CHEOL
IPC: A01N63/02
Filed: 2010-11-12
Abstract: PURPOSE: A microorganism formulation containing Bacillus velezensis KRICT934 strain and culture liquid thereof is provided to ensure excellent antibacterial activity against plant diseases and to enhance crop production. CONSTITUTION: A Bacillus velezensis KRICT934(deposit number KCTC 11774BP) strain is isolated from Brassica campestris L. roots and has an antibacterial activity against plant pathogenic bacteria. The bacteria causes sheath blight, tomato gray mold, tomato late blight, mill red rust, or barley powdery mildew. A microorganism formulation with an antibacterial activity against plant pathogenic bacteria contains the Bacillus velezensis KRICT934 strain or culture materials of the strain.
Patent KR-20120052060-A (KR)
Title: Expression of human recombinant sod3 protein using the animal cells and the thereof manufacturing method
Inventor: LEE YUN KEUN
IPC: C12N15/12
Filed: 2010-11-15
Abstract: PURPOSE: A method for preparing human recombinant SOD3 using animal cells is provided to easily isolate and purify the animal cells and to apply fusion protein to other industries. CONSTITUTION: A human recombinant SOD3 expression vector gene has a base sequence of sequence number 1. A SOD3 primer has a base sequence of sequence numbers 2 and 3 among human recombinant SOD2 expression vectors. The SOD3 protein has an amino acid sequence of sequence number 4.
Patent KR-20120052488-A (KR)
Inventor: LEE TAEK YONG
IPC: A47L9/10
Filed: 2010-11-16
Abstract: PURPOSE: A cardboard of a dust bag in a vacuum cleaner is provided to enable the application of a dust bag to all types of vacuum cleaners by facilitating the attachment and detachment of the dust bag in the vacuum cleaners. CONSTITUTION: A cardboard of a dust bag in a vacuum cleaner is as follows. The size of a Samsung cardboard is applied to an LG cardboard. A cutting line is formed around the extra portion of the Samsung's cardboard within the LG cardboard and cut to be used for a Samsung dust bag. The size of a Daewoo cardboard is applied to the LG cardboard. A cutting line is formed around the extra portion of the Daewoo cardboard within the LG cardboard size and cut to be used for a Daewoo dust bag. The cardboard is used as it is for an LG dust bag.
Patent KR-20120053899-A (KR)
Title: 도로 교통 정보 기반의 ｓｃｃ 속도 자동 설정 방법 및 차량의 ｓｃｃ 시스템
Inventor: LEE JONG HYUCK
IPC: G08G1/0968
Filed: 2010-11-18
Abstract: 본 발명은 크루즈 기능 또는 속도 제한 기능 설정시 도로 정보 시스템 정보를 기반으로 주행 중 차간 거리 제어장치(SCC; Smart Cruise Control)가 차량의 주행 속도(이하, SCC 속도라 함)를 제어할 수 있는 기술에 관한 것이다. 
이를 위해, 본 발명에 따른 도로 교통 정보 기반의 SCC 속도 자동 설정 방법은 (a) 차량의 SCC(Smart Cruise Control) 시스템이 운전자에 의해 설정된 속도로 SCC 속도를 설정하여 차량을 상기 SCC 속도로 주행시키는 단계, (b) 도로 정보 시스템으로부터 제공되는 도로 교통 정보에 기초하여 상기 SCC 속도를 모니터링하는 단계, (c) 상기 모니터링 결과, 상기 SCC 속도의 변경이 필요하면 상기 도로 교통 정보에 상응하는 속도로 SCC 속도를 재설정하는 단계, 및 (d) 상기 재설정된 SCC 속도에 해당하는 토크 제어신호를 상기 차량의 ESC 시스템으로 전송하여 상기 재설정된 SCC 속도로 상기 차량을 주행시키는 단계를 포함할 수 있다.
Patent KR-20120055346-A (KR)
Title: Circuit components and switching mode power supply having the same
Inventor: GWAK YONG SHIN
IPC: H04B1/38
Filed: 2010-11-23
Abstract: PURPOSE: A swing hinge device and a portable terminal with the same are provided to install a connection band on an inner circumference of a body and install a connection terminal on an external circumference of a rotating object. CONSTITUTION: A body unit(32) has a cylindrical shape. The body unit is fixed to a first body. A connection band(34) is installed on an inner circumference of the body unit. A rotating object(42) can rotates in the body unit. The rotating body is fixed to a second body. A connection terminal(44) is installed on an external circumference of the rotating object. The connection terminal contacts the connection band.
Patent KR-20120055414-A (KR)
Title: Integrated cooling for eco-friendly vehicle
Inventor: KIM JAE YEON
IPC: B60H1/32
Filed: 2010-11-23
Abstract: PURPOSE: An integrated cooling system for an environment-friendly vehicle is provided to improve the fuel efficiency by decreasing condensation pressures of an air-conditioner with minimizing ventilation resistances of a radiator. CONSTITUTION: An integrated cooling system for an environment-friendly vehicle comprises a first radiator(1), electric power parts, and an air-conditioner condenser(31). The electric power parts and the air- conditioner condenser are installed in a closed-loop cooling circuit having the first radiator and cooled. The electric power parts and the air-conditioning condenser are arranged in a same cooling circuit in series.
Patent KR-20120055955-A (KR)
Title: Open flow network system and method of controlling the same
Inventor: HONG WON TAEK
IPC: H04L12/54
Filed: 2010-11-24
Abstract: PURPOSE: An opened flow network system and control method thereof are provided to move traffic by determining flow according to network states and by dynamically allocating traffic transmission routes. CONSTITUTION: A controller creates forwarding information for flow by reflecting requests of a user and flow information received from an opened flow switch unit(20). The controller transmits the forwarding information for the flow to an opened flow switch unit by changing the type of the forwarding information into a flow entry type. The opened flow switch unit receives the flow entry type forwarding information for the flow from the controller. The opened flow switch unit manages traffics based on forwarding rules included on a list.
Patent KR-20120056362-A (KR)
Title: Flat Panel Diaplay And Image Quality Control Method Thereof
Inventor: KIM JAE HONG
IPC: G09G3/36
Filed: 2010-11-25
Abstract: PURPOSE: A flat panel display device and an image quality control method thereof are provided to maximize image quality while reducing loss of color information. CONSTITUTION: An image signal is high-pass filtered. An edge region is detected from the image signal(S23). Adjacent regions are established based on a detected edge region(S24). The pixel intensity of the adjacent regions is adjusted(S25). Original image information is maintained with respect to other regions.
Patent KR-20120057996-A (KR)
Title: Parallel Multi Stage Hydrogen Recirculation Ejector for Fuel Cell
Inventor: KIM JAE HOON
IPC: H01M8/04
Filed: 2010-11-29
Abstract: PURPOSE: Parallel multistep hydrogen recirculation ejector apparatus is provided to supply hydrogen provided to a plurality of ejectors by being controlled to simpler structure, thereby not increasing the number of valves even in wide operation range of a stack, and remarkably reducing volume and weight of fuel supply system. CONSTITUTION: Parallel multistep hydrogen recirculation ejector apparatus comprises: a chamber body(1) formed to inflowing and outflowing recirculated hydrogen; a plurality of ejector nozzles(3) installed inside the chamber body; and a rotatable valve unit installed in order to switching the plurality of ejector nozzles by rotation. The rotatable valve unit comprises: a rotatable spool(7) formed in order to switching the inlet of the plurality of ejector nozzles; and a valve body(11) in which a supply port(9) inflowing hydrogen for being supplied to the ejector nozzles.
Patent KR-20120081645-A (KR)
Title: Mounting structur for pcb
Inventor: KIM JI HUN
IPC: H05K7/12
Filed: 2010-11-30
Abstract: PURPOSE: A PCB coupling structure is provided to minimize a PCB from being damaged by coupling the PCB with a hook formed on a cover. CONSTITUTION: A PCB(20) is combined with one side of a cover(10). A hook(30) partially supports the upper or lateral side of the PCB. The hook comprises an extension unit(31) upwardly extended from the edge of a receiving unit and a hitching unit(32). The hitching unit is bended from the end of the extension unit to the central direction of the receiving unit. The hook includes an incline part(33) which is inclined in the central direction of the receiving unit.
Patent KR-20120059692-A (KR)
Title: 침전저감형 하수관
Inventor: OH CHANG JU
IPC: E03F3/00
Filed: 2010-12-01
Abstract: 본 발명은 하수를 내부 통로를 통해 이송시킬 수 있도록 지하에 매설되는 하수관에 관한 것으로서, 내측 상부에 호형 단면구조의 호형부분과, 호형부분의 양단에서부터 하방으로 연장된 수직부분과, 수직부분의 양단을 상호 연결하여 바닥면을 형성하는 수평부분을 갖는 구조로 형성되어 있다. 이러한 침전 저감형 하수관에 의하면, 바닥부분이 통수 단면을 줄일 수 있도록 형성되어 있어 유속을 높일 수 있고, 길이방향을 따라 이격되게 돌기가 형성되어 있어 내부 와류 형성에 의한 퇴적물의 상승을 유도하여 침전을 저감할 수 있는 장점을 제공한다.
Patent KR-20120060347-A (KR)
Title: Apparatus for sensing passenger
Inventor: SONG HYUN
IPC: B60N2/90
Filed: 2010-12-02
Abstract: PURPOSE: An occupant sensing device is provided to prevent damage caused by static electricity in production process by obtaining robustness with respect to the static electricity and to enhance the productivity. CONSTITUTION: An occupant sensing device comprises a sensor(100), a pair of shield films(200), and an adhesive member(300). The sensor is arranged inside a seat and detects occupants. The pair of shield films arranged in both sides of the sensor to be spaced from each other absorbs the static electricity. The adhesive member is arranged between the sensor and shield film and bonds the sensor and shield film.
Patent KR-20120062170-A (KR)
Inventor: JEON KWANG HA
IPC: G06F9/455
Filed: 2010-12-06
Abstract: 가상 모니터 위치 결정용 영상 이미지 및 사용자의 손에 대한 영상 이미지를 촬영하는 카메라 및 윈도우 이미지들을 구비하는 그래픽 장치를 구비하는 증강현실 디스플레임 시스템의 가상 모니터 제어 방법이, 가상 모니터 위치 결정용 영상 이미지와 상기 윈도우 이미지를 PTAM 처리하여 설정된 위치에 윈도우 이미지를 매핑하여 가상 모니터를 생성하는 PTAM처리과정과, 손 영상 이미지로부터 손끝을 추출하는 손끝 추출과정과, 가상 모니터에 손끝 이미지가 렌더링되지 않도록 스텐실 버퍼링하는 스텐실버퍼링 과정과, 스텐실 버퍼링된 가상모니터에 손끝의 충돌여부를 판정하는 충돌판정과정과, 충돌 여부에 따라 가상 모니터의 동작을 제어하는 기능처리과정으로 이루어진다.
Patent KR-20120076614-A (KR)
Title: Ship block management system and ship block transporter work assignment method thereof
Inventor: LEE SANG HYUP
IPC: G06Q50/04
Filed: 2010-12-07
Abstract: PURPOSE: A block management system and ship block transporter work allocation method thereof are provided to effectively allocate works to transporters which transfer blocks through a block management system which manages blocks. CONSTITUTION: A communication unit(12) transmits and receives block transfer related information. A control unit(11) grasps the physical loading/unloading restriction of a block transport related work. The control unit selects flexible works from the physical loading/unloading restriction. The control unit gives penalty points by reflecting a follow-up work interlocked with the selected work. The control unit allocates transporters to a work which has low penalty points.
Patent KR-20110070797-A (KR)
Title: Image rejection receiving apparatus using on-chip integrated filter
Inventor: NGUYEN TRUNG KIEN
IPC: H04N5/21
Filed: 2010-12-15
Abstract: PURPOSE: An image signal canceling and receiving device using an on-chip notch filter is provided to cancel an image signal more effectively in the reception of the image signal. CONSTITUTION: An RF(Radio Frequency) filter unit(10) filters an RF signal. The amplifier(21) of an image removing filter unit(20) amplifies the output signal of the RF filter unit. The image removing filter(22) of the image removing filter unit eliminates an image signal from the output signal of the amplifier. The image removing filter is composed of a third notch filter. The mixer(23) of the image removing filter unit mixes the image signal-removed signal and an input oscillation signal.
Patent KR-20120069404-A (KR)
Title: Tester and test system including the same
Inventor: LEE CHANG HWAN
IPC: G01R31/26
Filed: 2010-12-20
Abstract: PURPOSE: A tester and a test system including the same are provided to simultaneously test different types of semiconductors through a self-test using a memory controller and test program. CONSTITUTION: A host(300) is a general computer, a personal computer, or a work station embedded with an operating system and various application software. Testers(100a,100b,100c) are connected to the host and can communicate with the host at the same time. The host transmits test requests to the testers and receives test results and/or test finish signals. The testers include memory controllers(110a,110b,110c), connection units(120a,120b,120c), and contact units(130a,130b,130c).