baber/WOPTO huggingface dataset:
Patent KR-20090101356-A (KR)
Title: Defect detecting device, and defect detecting method
Inventor: YAMAZAKI RYUICHI
IPC: G01T1/00
Filed: 2008-01-16
Abstract: Provided is a defect detecting device, which comprises addition calculating means for calculating the added value of the individual pixels, as arranged in a predetermined direction, of a taken image of an inspection object, index calculating means for calculating an index value indicating the homogeneity of the values of the individual pixels of the image arrayed in that predetermined direction, added value correcting means for correcting the added value on the basis of the index value, and decision means for deciding the presence/absence of a linear defect on the inspection object, on the basis of the result of the comparison between the corrected added value and the threshold value.
Patent KR-20090106555-A (KR)
Title: Stage apparatus, exposure apparatus and device manufacturing method
IPC: H01L21/68
Filed: 2007-12-21
Abstract: A stage apparatus is provided with a fixed section (16) having a prescribed moving surface (16a), and a first moving body which can move along the moving surface (16a) in a plurality of directions including a first direction. The stage apparatus is also provided with substages (61A, 61B) which move in a first direction to the moving surface (16a) in synchronization with movement of the first moving body; a first measuring apparatus (67), which is arranged on the substages (61A, 61B) at least partially and detects information relating to relative position in the first direction between the substages (61A, 61B) and the moving surface (16a); and second measuring apparatuses (71, 72), which are arranged on the substages (61A, 61B) at least partially and detect information relating to relative position in a second direction which substantially orthogonally intersects with the first direction between the substage and the first moving body and is along the moving surface (16a).
Patent KR-20090112693-A (KR)
Title: Blending mobile search results
IPC: G06F17/00
Filed: 2008-01-24
Abstract: Methods, systems, and apparatus, including computer program products, for blending mobile search results. A method includes receiving a search query and multiple search results. The search results each satisfy the search query and have a respective search result quality score. The search results include generic and mobile search results. The generic and mobile search results each identify a generic and mobile resource, respectively. The search result quality scores include mobile and generic search result quality scores for the mobile and generic search results, respectively. The mobile search result quality scores and the generic search result quality scores were generated according to different scoring formulas. Based on one or more terms in the search query, the search query is classified as a mobile query. As a consequence, one or more search result quality scores are modified to improve the sorting of search results that include both mobile and generic search results.
Patent KR-20090104113-A (KR)
Title: Multi-phase voltage transforming device, vehicle, and multi-phase transforming device control method
IPC: B60L11/18
Filed: 2008-01-18
Abstract: A multi-phase voltage transforming device (10) includes: voltage transformers (31 to 33) which perform voltage transformation according to a control cycle selected from a plurality of predetermined control cycles; and a control device (30) instructing a control cycle to the voltage transformers (31 to 33). The control device (30) updates the control cycle for the voltage transformers (31 to 33) at a predetermined update cycle. The update cycle is the least common denominator of the control cycles. The number of the voltage transformers is n. The control device (30) successively updates the control cycle with a time difference equal to 1/n of the update cycle. Thus, it is possible to provide a multi-phase voltage transforming device which can suppress output voltage ripples.
Patent KR-20090104135-A (KR)
Title: Robotically controlled display
IPC: G06F1/16
Filed: 2008-01-29
Abstract: An electronic display configured to display visual information is mounted to a display mount. The display mount is movable in three-dimensions, whereby the associated display may be moved in three-dimensional space. In one embodiment, a unitary display comprises a plurality of closely spaced individual displays which are mounted to movable display mounts, whereby the configuration of the unitary display may be altered by changing the position of one or more of the displays relative to the others.
Patent KR-20090125107-A (KR)
Title: Techniques for improved error detection in a wireless communication system
Inventor: TIIROLA ESA
IPC: H04W28/04
Filed: 2008-03-18
Abstract: In one exemplary embodiment of the invention, a method including: determining whether first allocation information has been transmitted from a first device towards a second device in a wireless communication system (901); and transmitting a message including transmittal information and second allocation information from the first device towards the second device, wherein the transmittal information corresponds to the determined transmittal of the first allocation information (902). In another exemplary embodiment of the invention, a method including: detecting whether a first signal is received on a dedicated resource of a wireless communication system (501); detecting whether a second signal is received on a shared resource of the wireless communication system (502); and determining, based on a detection outcome for the first signal and a detection outcome for the second signal, whether at least one allocation has failed (503).
Patent KR-20090128419-A (KR)
Title: Ofdm reception apparatus
Inventor: CHEN HANDA
IPC: H04L27/26
Filed: 2008-02-19
Abstract: An OFDM reception apparatus which can accurately extract transmission path information from a received signal. The OFDM reception apparatus (100) comprises an FFT unit (1), a division unit (2), an IFFT unit (7), and an LPF unit (8). The FFT unit (1) performs a Fourier transform of a signal received from outside. The division unit (2) divides the pilot signal included in the output signal from the FFT unit (1) by a specified pilot signal and generates a transmission path transfer function in the frequency domain. The IFFT unit (7) performs an inverse Fourier transform of the transmission path transfer function in the frequency domain and generates a transmission path impulse response in the time domain. The LPF unit (8) performs a filtering process to the transmission path impulse response in time domain generated by the IFFT unit (7). The OFDM reception apparatus (100) demodulates the OFDM signal according to the output signal from the LPF unit (8).
Patent KR-20090125276-A (KR)
Title: Muscle hardness meter
Inventor: SAKAGAMI TOSHIMASA
IPC: A61B5/22
Filed: 2007-08-23
Abstract: A muscle hardness meter which measures the hardness of a muscle tissue of the living organism comprises an auxiliary part (26) which is made to abut to the vicinity of a living organism section to be measured and applies a pressure to the vicinity of the section to be measured, an abutting part (40) which is made to abut to the section to be measured and applies a pressure to the section to be measured, a first pressure sensor (54) which measures pressures which are applied respectively from the section to be measured and the vicinity to the abutting part (40) and the auxiliary part (26) and outputs a first measurement result, a second pressure sensor (53) which measures the pressure applied from the section to be measured to the abutting part (40) and outputs a second measurement result, a notifying part (6) which notifies the second measurement result, and a control part which judges whether the first measurement result has reached a reference pressure value inputted previously and makes the notifying part notify the second measurement result obtained in the case where it is judged that the first measurement result has reached the reference pressure value.
Patent KR-20100028023-A (KR)
Title: Laser pigments for ceramics
Inventor: LIND JORG
IPC: C09C1/00
Filed: 2008-04-11
Abstract: The invention relates to the use of compounds based on metal phosphate and mixtures, mixed compounds, mixed salts, or adducts comprising such compounds, as pigments for producing single or multi-color markings, labeling and/or decors by means of laser light in and/or on ceramics, stoneware, pottery, earthenware, porcelain, ceramic glazes, engobes, glass or glass flow (enamel).
Patent KR-20090133132-A (KR)
Title: Method and system for transferring wireless transmit/receive unit-specific information
Inventor: RUDOLF MARIAN
IPC: H04B7/26
Filed: 2004-11-09
Abstract: The present invention is related to a method and system for transferring wireless transmit/receive unit (WTRU)- specific information to support enhanced uplink (EU) operation in a wireless communication system. A radio network controller (RNC) obtains WTRU-specific information, and transfers the WTRU-specific information to the Node-Bs. Each Node-B is configured to schedule uplink transmissions from a WTRU and utilizes the WTRU-specific information in operation of EU transmissions.
Patent KR-20110080679-A (KR)
Title: Water ecology purification equipment and method
Inventor: CHUNG SUN HEE
IPC: C02F7/00
Filed: 2010-01-06
Abstract: PURPOSE: An apparatus for purifying water ecology and a method for purifying the water ecology are provided to purify water and eliminate contaminants from deposited soil, precipitated soil, deposit, and precipitate. CONSTITUTION: Floating plant(30), a water surface aerating unit, an underwater aerating unit, a water surface mesh, and a precipitating agent are prepared. The floating plant is floated on the surface of water. The water surface aerating unit aerates water on the surface of the water. The underwater aerating unit aerates deposited soil, precipitated soil, deposit, and precipitate. The water surface mesh filters contaminants on the surface of the water. The precipitating agent precipitates particulate materials in the water.
Patent KR-20110080770-A (KR)
Title: A freezing burst prevention system for heat exchanger and a method of controlling for the same
Inventor: LEE HYUNG SIK
IPC: F28F17/00
Filed: 2010-01-07
Abstract: PURPOSE: A freezing burst prevention system of a heat exchanger and a control method thereof are provided to minimize the damage caused by freezing and to prevent effectively being frozen to burst. CONSTITUTION: A freezing burst prevention system(1) of a heat exchanger comprises: a heat exchanger(2) transferring heat between water and air, and including a plural tubes(21) having a flow path to circulate water and plural pins(22) to penetrate the tubes successively; and a freezing burst prevention unit(3) emitting heat toward the water to prevent water inside the heat exchanger from freezing and located on the lowermost end of the heat exchanger.
Patent KR-20110082831-A (KR)
Title: Method for identifying biomarker for in vivo potency-variation of human mesenchymal stem cells
Inventor: KIM HYO SOO
IPC: C12N15/12
Filed: 2010-01-12
Abstract: PURPOSE: A method for selecting an active biomarker of human mesenchymal stem cells is in vivo is provided to develop cell therapeutic agent. CONSTITUTION: A method for selecting an active biomarker of human mesenchymal stem cells comprises: a step of performing DNA array of human mesenchymal stem cells having different activities; a step of selecting gene having expression difference between the human mesenchymal stem cells; and a step of checking a biomarker for labeling activity difference of the mesenchymal stem cells in vivo. The activity includes an ability of relieving cardiovascular diseases. The treatment of cardiovascular disease is measured using an ischemic cardiovascular rat model. The human mesenchcymal stem cells are derived from human umbilical blood.
Patent KR-20110085031-A (KR)
Title: Production method of deodorized fucoidan
Inventor: PARK KEUN HYOUNG
IPC: A61K31/737
Filed: 2010-01-19
Abstract: PURPOSE: A method for preparing fucoidan with reduced smell is provided to improve functional characteristic and to enhance physiological activity. CONSTITUTION: A method for preparing fucoidan with reduced smell comprises: a step of adding 10-30 times volume of ethanol to fucoidan; a step of shaking at 200-300 rpm for 10 minutes to two hours; a step of spraying and drying at 150-200°C and 8,000-18,000 rpm; and a step of deodorizing.
Patent KR-20110085043-A (KR)
Inventor: RYOO HAN KYOO
IPC: B60R99/00
Filed: 2010-01-19
Abstract: PURPOSE: A car inspection method in a car inspection station and a method are provided to efficiently use the space of the inspection station by fixing the number of equipments even if the number of equipment PC(personal Computer) is increased. CONSTITUTION: A car inspection system comprises an input PC(220), a diagnosis PC(230), and an equipment PC(210). The information about car is inputted to the input PC. The diagnosis PC receives a message the information of car from the input PC. The diagnosis PC extracts and transfers the data and checklist of car from the received information of car and the diagnosis. The equipment PC directs command to the inspection equipment in order to inspect the car according to the data and checklist which is received from the diagnosis PC. The equipment PC transfers the inspection result which is received from the inspection equipment.
Patent KR-20110086905-A (KR)
Title: A control device for automatic security door and method thereof
Inventor: KIM JUN SEOK
IPC: G01S13/02
Filed: 2010-01-25
Abstract: PURPOSE: A device and method for controlling automatic security door which has improved security function are provided to prevent the entering of a person who does not have entrance authority. CONSTITUTION: A device for controlling automatic security door which has improved security function comprises a sensor(10), a controller, a storage, and indicating part(50). The sensor senses the waved reflected from an object within a sensing area and outputs sensing signal. The controller includes a comparison judgment module determining the match between the sensing signal and access thing pattern. The indicating part orders the opening and closing of the door based on the determination result of the comparison judgment module.
Patent KR-20110089766-A (KR)
Title: Container transporting apparatus and method
Inventor: KIM CHEOL HO
IPC: B65G67/60
Filed: 2010-02-01
Abstract: PURPOSE: A device and a method for transferring containers are provided to be applied in an automatic container loading system or a moveable port and to stably and systemically transfer containers. CONSTITUTION: A device for transferring containers comprises a driving module(210), an elevation module, a transmission module(230), and a power supply module(240). The elevation module is located in the driving module and transfers containers to a vertical direction. The transmission module is located on the elevation module and transfers container between container loading devices.
Patent KR-20110092103-A (KR)
Title: Sidewalk block capable of storing water and planting
Inventor: CHUNG IN EUN
IPC: E01C15/00
Filed: 2010-02-08
Abstract: PURPOSE: A water storage sidewalk block equipped with a hot water pipe is provided to prevent the freezing of stored rainwater by supplying hot water to the hot water pipe in a cold or snowy weather. CONSTITUTION: A water storage sidewalk block equipped with a hot water pipe comprises a main body(110) and a cover(120). The main body comprises a plurality of storage chambers(111) for storing rainwater, wherein the storage chambers are communicated with each other through connection holes(112a) formed on partitions(112). The cover has a plurality of rainwater inflow holes(120a) on the top to draw in rainwater. The main body has a plurality of rainwater drain holes(110a) on the bottom to discharge rainwater and first and second pipe hanging grooves(130,140) on the sides to install a hot water pipe.
Patent KR-20110096362-A (KR)
Title: High heat-resistance exhaust valve spindle of marine engine having excellent wear resistance and corrosion resistance
Inventor: PARK KYEUNG CHAE
IPC: F01L3/20
Filed: 2010-02-22
Abstract: PURPOSE: A high-heat-resistance exhaust valve spindle of a ship engine having excellent wear and corrosion resistance is provided to ensure excellent heat and corrosion resistance since an exhaust-valve spindle is formed from stainless steel. CONSTITUTION: A high-heat-resistance exhaust valve spindle of a ship engine having excellent wear and corrosion resistance comprises a head unit(20) and a stem unit(30). The head unit opens and closes the exhaust port of the ship engine. The stem unit guides the linear reciprocating movement of the head unit. The head unit and the stem unit are formed from stainless steel. A ring form of a groove(22) is formed on the surface edge of the seat(21) of the head unit. Circular beads are overlaid on the groove in multi layers to deposit Co-series alloy.
Patent KR-20110099927-A (KR)
Inventor: CHOO HYUNG WOOK
IPC: F16L3/00
Filed: 2010-03-03
Abstract: 본 발명은 다수개의 케이블이나 실 또는 머리카락 등 세장형 대상물을 모아서 신속하게 결속 및 해체시킬 수 있는 묶음용 결속구에 관한 것으로, 내주면에 원주방향으로 연장되는 요홈을 구비하며 측면에서 보아 원호형상을 이루는 제1 결속본체와 제2 결속본체; 상기 제1 결속본체와 제2 결속본체의 일측 단부에 마련되며 상기 제1 결속본체와 제2 결속본체를 힌지 결합시키는 힌지부; 상기 힌지부에 대향하는 제1 결속본체와 제2 결속본체의 타측 단부 부근에 마련되며 상호 결합 및 분리가 가능한 제1 걸림부와 제2 걸림부를 포함하되, 상기 제1 결속본체와 제2 결속본체의 내주면에는 상기 요홈을 사이에 두고 테두리부가 돌출되게 형성되며, 상기 테두리부에는 다수의 결속용 돌기부가 형성된 것을 특징으로 하므로, 뭉쳐진 머리카락이나 실 등을 묶거나 푸는 작업을 신속하게 편리하게 수행할 수 있을 뿐만 아니라, 묶여 있던 세장형 대상물이 훼손되거나 변형되는 것을 방지할 수 있다는 효과가 있다.
Patent KR-20110100698-A (KR)
Inventor: LEE MYUNG JIN
IPC: H01L21/02
Filed: 2010-03-05
Abstract: 본 발명은 기판 상에 재료를 증착하는 공정 챔버의 개폐 장치에 관한 것이다. 
본 발명은 기판 지지대가 내부에 구비된 바디; 상기 바디의 측면에 구비되고, 상기 바디로부터 기설정된 폭만큼 돌출된 기판 출입부; 및 상기 기판 출입부와 면접하여 상기 바디를 개폐하는 밸브를 포함하여 이루어지는 것을 특징으로 하는 공정 챔버를 제공한다. 
따라서, 챔버의 기판 출입부가 돌출된 구조로 형성되고 밸브 하우징이 기판 출입부를 감싸며 블레이드가 기판 출입부의 돌출된 구조를 완전히 밀봉하여, 챔버가 완전히 진공인 상태에서 기판 상에 재료의 증착 공정이 이루어져서 재료의 이상 증착이나 이상 방전 및 그에 따른 파우더의 적체가 감소된다.
Patent KR-20100043164-A (KR)
Title: Anti-fog water goggle
Inventor: SONG JUNE HO
IPC: A63B33/00
Filed: 2010-03-17
Abstract: PURPOSE: Anti-fog swimming goggles are provided, which can eliminate fog in the swimming goggles lens using cool air obtained by inducing circulation. CONSTITUTION: Anti-fog swimming goggles comprise: a swimming goggles main body; and a convection apparatus which is installed to the swimming goggles and generates free convection. The convection apparatus includes: a cool air pipe(101) which is made of soft plastic material and in which the cool air moves to the inside of the swimming goggles; a warm air pipe(102) which is thinner than the cool air pipe and in which the warm air moves to the outside of the swimming goggles; a heat exchanger(100) in which the warm air is cooled by the cool air; an air exhaust pump(103); and a pressure unit(104) for controlling the inner pressure.
Patent KR-20110106700-A (KR)
Inventor: KANG SUNG KOO
IPC: B82Y40/00
Filed: 2010-03-23
Abstract: 본 발명의 실시예에 따르면, 본 발명은 금속 전구체, 아민 및 비수계 용매를 포함하는 제1 용액을 준비하는 단계, 상기 제1 용액을 가열 및 교반하고, 환원하여 아민이 캐핑된 금속 나노입자를 제조하는 단계, 제조된 상기 금속 나노입자 중 미반응 아민을 세척하고, 상기 금속 나노입자를 비수계 용매에 분산시켜 제2 용액을 준비하는 단계 및 상기 제2 용액에 산을 첨가하고, 가열 및 교반하여 분산된 상기 금속 나노입자에 부분적으로 산을 캐핑하는 단계를 포함하는 금속 나노입자의 제조방법, 이를 이용한 잉크 조성물 및 그의 제조 방법을 제공한다. 
본 발명의 실시예에 따르면, 금속 나노입자의 치환기를 변경함에 따라 표면 안정성, 우수한 접착력 및 크랙 저감 효과를 갖는 금속 나노입자의 제조방법, 이를 이용한 잉크 조성물 및 그의 제조 방법을 제공할 수 있다.
Patent KR-20110107531-A (KR)
Inventor: CHO OH HYOUNG
IPC: G02B30/25
Filed: 2010-03-25
Abstract: 본 발명은 입체화상시스템에 관한 것으로서, 보다 상세하게는 화상표시장치로부터 출사된 빛을 원편광으로 변환시키기 위한 필터부 및 착용자의 좌안 및 우안에 각각 입체화상을 전달하기 위한 셔터 안경부로 이루어지고, 상기 필터부는 제1 편광자와 제1 λ/4 위상차 필름을 포함하며, 상기 셔터 안경부는 제2 λ/4 위상차 필름, 액정패널 및 제2 편광자를 포함하며, 상기 제2 λ/4 위상차 필름의 지상축은 상기 제1 λ/4 위상차 필름의 지상축과 서로 수직으로 배치됨으로써, 제2 λ/4 위상차 필름에 의한 파장분산성을 감소시켜 고스트 현상(좌우 화상의 미분할)을 개선시킬 수 있고, 눈의 피로도를 감소시킬 수 있는 입체화상시스템에 관한 것이다.
Patent KR-20100039841-A (KR)
Title: Process for preparing thereof of a bean-curd whichcontains cirsium setidens
Inventor: SONG SANG MIN
IPC: A23L11/00
Filed: 2010-03-29
Abstract: PURPOSE: A method of manufacturing bean curd containing Cirsium setidens is provided to improve functions of the bean curd with strengthened tastes by adding Cirsium setidens powder in a manufacturing process of the bean curd. CONSTITUTION: A method of manufacturing bean curd containing Cirsium setidens comprises the following steps: filtering crushed soybeans with a sieve of 40 mesh or more; separating the soybeans into soybean milk and bean-curd dregs; putting the soybean milk into a tank after heating the soybean milk in 100°C for 10 ~ 20 minutes; concentrating the soybean milk to 12 ~ 18 %; drying the washed Cirsium setidens in 80°C for 24 hours; cutting the dried Cirsium setidens to a thickness of 1 mm or less; storing the cut Cirsium setidens in a freezer; pulverizing the frozen Cirsium setidens; agitating the crushed Cirsium setidens to size of 10 ~ 50 mesh; adding potassium chloride 0.5~1% in a compound; and cooling bean curd for 5 minutes in 80°C.
Patent KR-20110108574-A (KR)
Inventor: LEE CHIL WON
IPC: H01L51/50
Filed: 2010-03-29
Abstract: 본 발명은 7번 탄소가 포화된 벤조나프타센 형태의 방향족 유도체 및 이를 포함하는 유기발광다이오드에 관한 것이다. 본 발명의 방향족 화합물은 바람직하게는 청색 또는 녹색 유기 발광 다이오드에 적용할 수 있으며, 우수한 내열성을 가져 이를 함유하는 유기발광다이오드는 수명이 길며, 색순도 및 발광효율이 높고, 저전압구동이 가능하다.
Patent KR-20110108731-A (KR)
Title: 말풍선 입력 시스템 및 말풍선 입력 방법
Inventor: KIM YU
IPC: G06F17/00
Filed: 2010-03-29
Abstract: 마우스를 이용하여 화면상에 그림을 그리는 중, 말풍선 입력을 위한 별도의 조작 없이도 자신이 원하는 위치에 간편하게 말풍선을 생성할 수 있는 말풍선 입력 시스템 및 말풍선 입력 방법을 제공하기 위하여, 본 발명은 라인 생성 신호가 입력되는 제1 입력 장치; 텍스트 생성 신호 및 텍스트 생성 완료 신호가 입력되는 제2 입력 장치; 상기 제1 입력 장치 및 상기 제2 입력 장치에 의해 입력된 라인 및 텍스트가 디스플레이되는 디스플레이 부재; 및 상기 제2 입력 장치를 통해 상기 텍스트 생성 완료 신호가 입력되면, 상기 디스플레이 부재 상에 상기 입력된 텍스트가 포함된 말풍선을 형성하도록 제어하는 제어부를 포함하는 말풍선 입력 시스템을 제공한다.
Patent KR-20100109477-A (KR)
Title: Substrate processing apparatus
Inventor: HAYASHI DAISUKE
IPC: H01L21/3065
Filed: 2010-03-30
Abstract: PURPOSE: A substrate processing apparatus can prevent from being consumed with the plasma in which the other dielectric member generates in the first space. CONSTITUTION: A substrate processing apparatus(10) comprises the container, movable electrode, opposing electrode, partition wall is included. A container accepts substrate. The movable electrode moves in the shape holder according to the central axis of the shape holder. The opposing electrode faces in the shape holder in the movable electrode.
Patent KR-20110108913-A (KR)
Inventor: HAHM DAE GI
IPC: F16F15/02
Filed: 2010-03-30
Abstract: 원자력 발전을 위한 구조물 및 기기들과 같은 소형의 대상물의 지진응답 감쇠를 위한 2방향 동조질량감쇠기가 개시된다.  본 발명에 따른 2방향 동조질량감쇠기는 내부공간을 구비한 구조체, 상기 내부공간에 위치한 질량체, 상기 질량체의 일면과 상기 구조체를 연결하는 제 1 스프링, 상기 질량체의 일면과 상기 구조체를 연결하되, 상기 제 1 스프링에 의한 탄성력과 동일한 방향으로 감쇠력을 제공하는 제 1 댐퍼, 상기 질량체의 타면과 상기 구조체를 연결하는 제 2 스프링, 그리고 상기 질량체의 타면과 상기 구조체를 연결하되, 상기 제 2 스프링에 의한 탄성력과 동일한 방향으로 감쇠력을 제공하는 제 2 댐퍼를 포함하며, 상기 제 1 스프링의 연결방향과 상기 제 2 스프링의 연결방향은 서로 상이하다.  이와 같은 구성에 의하면, 소형의 대상물의 진동응답을 효율적으로 감쇠시킬 수 있게 된다.
Patent KR-20100109870-A (KR)
Title: System and method for searching document
Inventor: YEON CHAN IK
IPC: G06F17/21
Filed: 2010-03-31
Abstract: PURPOSE: A document searching system and a method thereof are provided to supply to a document reader the summary and detailed information for the product indicated by the metadata in a web/WAP(Wireless Application Protocol) document. CONSTITUTION: A client(40): detects the metadata inserted into a corresponding document from a document that is written by a document provider; extracts a reference value; demands product information corresponding to a product ID, which is indicated by the reference value of the metadata, to a server to collect the product information; and offers the product information to the document reader. Additionally, the client collects the reference value and information on the document reader who reads the document, into which the metadata is inserted, and stores the collected data in a server.