baber/WOPTO huggingface dataset:
Patent KR-20020046195-A (KR)
Inventor: IKEDA MIYUKI
IPC: A61F13/15
Filed: 2001-12-08
Abstract: PURPOSE: To provide a throw-away wearing article which brings the opposite side portions around the legs of the article having elastic stretchability into tight contact with the portions around the legs of a wearing person, thereby making it possible to prevent the leakage of excrement from the portions around the legs. CONSTITUTION: A base sheet 2 having the elastic stretchability is two-folded and fastened in the opposite side portions 2c around the legs. The basis weight in the opposite side portions 2c is greater than that of the remaining region of the base sheet 2 exclusive of the opposite side portions 2c. The elongating force of the base sheet 2 in the opposite side portions 2c is higher than that of the remaining region.
Patent KR-20030048742-A (KR)
Title: Body shaper of aluminium ware
Inventor: YANG CHUL HOON
IPC: A45D44/00
Filed: 2001-12-13
Abstract: PURPOSE: Provided is a body shape correcting apparatus using aluminum which increases heat generation of the body, promotes blood circulation in the skin by radiation and convection. CONSTITUTION: The body shape correcting apparatus effectively corrects the body shape using aluminum. Aluminum is excellent in heat conductance, malleability and softness. When aluminum is wrapped around a human body, it takes heat from the body. Therefore, heat is consumed and muscles continuously move and burn fat around the muscles to generate heat. Aluminum also chemically reacts with nitrogen, sulfur, carbon and the like exhausted from the body, thereby removing waste matters from the body such as nitride, sulfide, carbide.
Patent KR-20030049141-A (KR)
Title: A forming method of titanium nitride layer and fabricating method of semiconductor device
Inventor: LEE IN HAENG
IPC: H01L21/20
Filed: 2001-12-14
Abstract: PURPOSE: A method for forming a barrier layer of a semiconductor device is provided to be capable of improving barrier properties of CVD(Chemical Vapor Deposition)-TiN layer. CONSTITUTION: An interlayer dielectric(42) having a contact hole is formed on a substrate(41). A metal film(44) is formed at inner walls of the contact hole, and a metal silicide(45) is formed at the interface between the substrate(41) and the contact hole. A CVD-TiN layer(46) as a barrier layer is formed on the resultant structure by depositing a titanium nitride layer using TiCl4 and NH3 as a source gas and by nitridation treating of the deposited titanium nitride layer at atmosphere containing N2 or NH3.
Patent KR-20020048879-A (KR)
Inventor: KINOMURA NOBUKAZU
IPC: C09K11/02
Filed: 2001-12-15
Abstract: PURPOSE: To provide inexpensive fluorescent particles of low phosphor content. CONSTITUTION: The fluorescent particles are each such that the surface has a phosphor layer comprising a phosphor and the inside comprises an inorganic matter other than a phosphor; wherein a 1st version of the fluorescent layer comprises a phosphor based on a compound composed of M1, Al and O (M1 is at least one metallic element selected from the group consisting of Ba, Sr, Mg and Ca) and containing Eu and/or Mn as the activator; a 2nd version of the phosphor layer comprises a phosphor based on a compound composed of Zn, Si and O and containing Tb and/or Mn as the activator; and a 3rd version of the phosphor layer comprises a phosphor based on a compound composed of M4 and O (M4 is at least one metallic element selected from the group consisting of Y, Gd and B) and containing Eu as the activator.
Patent KR-20030052313-A (KR)
Title: Hollow, side by side type polyethylene/polypropylene conjugated fiber with high stretchability and lightweight and method for producing non-woven fabrics by use of it
Inventor: AHN SEUNG SIK
IPC: D04H1/54
Filed: 2001-12-21
Abstract: PURPOSE: Polyethylene/polypropylene parallel hollow conjugate fiber has 20-30% of hollow ratio, super light weight, excellent bulkiness and excellent elasticity. A method manufacturing non-woven fabric out of the fiber is provided. CONSTITUTION: Polyethylene/polypropylene parallel hollow conjugate fiber is comprised of: polyethylene having 100-140deg.C of melting point, 0.9500-0.9700 of density, 3.0-8.0 of molecular weight distributed index(Q) and 10-25 of melt viscosity index(MFI); and polypropylene having 150-170deg.C of melting point, 0.9000-0.9200 of density, 3.0-8.0 of Q and 10-25 of MFI. Non-woven fabric is obtained by the steps of: carding the conjugate fiber to form web; passing through a heated-air box having 130-140deg.C at 60-100m/min.; and then calendering the non-woven fabric.
Patent KR-20030052352-A (KR)
Title: High strength steel sheet having superior formability and method for manufacturing there of
Inventor: KIM IL YEONG
IPC: C22C38/12
Filed: 2001-12-21
Abstract: PURPOSE: A method for manufacturing high strength steel sheet having superior formability and tensile strength of greater than 50 kg/mm¬2 for use in automobile panel is provided, which is characterized in that the high strength steel sheet contains Nb which induces the growth of micro structure advantageous to improve formability together with Ti that fix C, N and S in the form of carbide, nitride and sulfide. CONSTITUTION: The method include the steps of soaking an aluminum killed steel slab comprising 0.01 wt.% or less of C, Mn 1.0 to 3.0 wt.%, P 0.04 to 0.10 wt.%, Si 0.3 to 0.8 wt.%, 0.015 wt.% or less of S, 0.06 wt.% or less of sol.Al, 0.005 wt.% or less of N, Cu 0.5 to 1.0%, Ti 0.01 to 0.04 wt.%, 6.63£C|<=Nb<=6.63£C|+0.02 wt.%, a balance of Fe and incidental impurities at 1200 to 1250°C; hot rolling the aluminum killed steel slab, wherein the temperature of finish hot rolling is over Ar3 transformation point; coiling the hot rolled aluminum killed steel sheet at 550 to 700°C; cold rolling the hot coil; continuous annealing the cold coil at higher than 800°C; and temper rolling the annealed cold coil.
Patent KR-20030052552-A (KR)
Title: Poly α-olefin resin for extrusion coating or extrusion laminating
Inventor: HONG MYEONG SEON
IPC: C08F210/02
Filed: 2001-12-21
Abstract: PURPOSE: Provided is a polyalpha-olefin resin for extrusion coating and extrusion laminate, which has excellent adhesion and can be applied to OPP(oriented polypropylene) film, polyester film, silicon coating paper, Kraft paper and the like. CONSTITUTION: The resin comprises 70 to 99 wt.% of ethylene, 0.5 to 10 wt.% of propylene and 0.5 to 20 wt.% of hexene. The resin has a melt index of 0.5 to 100 g/10min at 190 deg.C and a density of 0.900 to 0.940 g/cm3. The propylene and hexene are inserted into the polymer main chain to interrupt the formation of a molecular structure. As a result, the resin molecule has an amorphous structure and better adhesion properties as compared to the conventional resin. The compositional ratio of propylene and hexene is determined by considering the balance of the crystallized part and the amorphous part in the molecule.
Patent KR-20030052736-A (KR)
Title: Method of fine coal content analysis in blast furnace dust
Inventor: KIM SEONG MAN
IPC: C21B7/22
Filed: 2001-12-21
Abstract: PURPOSE: A method for measuring content of very fine coal in blast furnace dust is provided to accurately measure content of very fine coal in the blast furnace dust in which coke is mixed with very fine coal. CONSTITUTION: In a method for measuring content of very fine coal in blast furnace dust discharged through the upper part of blast furnace, the method for measuring content of very fine coal in the blast furnace dust is characterized in that content of very fine coal in the blast furnace dust is measured by thermally analyzing the blast furnace dust, wherein content of very fine coal is measured by the thermal analysis of the blast furnace dust using combustion reaction rate difference between coke and very fine coal in the blast furnace dust. The thermal analyzer used in the method for measuring content of very fine coal in the blast furnace dust is characterized in that a heating element(2) is installed inside casing, a sample(3) is charged into a reaction tube(4) inside the heating element(2), air is injected into the casing through an air injection port(5) installed on the upper part of the casing, combustion gas is exhausted through a gas exhaust port(6) of the lower part of the casing, a scale(1) is installed in the upper part of the casing to measure weight variation according to combustion reaction, and a data processor(7) is installed at one side of the scale(1) to store data of the measured weight variation.
Patent KR-20020023837-A (KR)
Inventor: KIM GU WON
IPC: B60T7/10
Filed: 2001-12-21
Abstract: PURPOSE: A solenoid valve of a parking brake is provided to make the best use of space in a vehicle, to operate the parking brake conveniently, and to prevent accidents by installing the parking brake solenoid valve, and supplying hydraulic pressure through a cylinder to wheels. CONSTITUTION: A parking brake solenoid valve is composed of a cylinder(1), and the side of the cylinder is closed completely. An electromagnetic coil(4) is installed in the cylinder, and a fixing blade(9) is mounted at the side of the electromagnetic coil to mount the electromagnetic coil in the vehicle body. Circulation holes(3,3b) are installed to flow brake oil to the cylinder, and a valve(6) is mounted in the cylinder to open and close circulation holes. A connecting bar(7) is installed between valves(6a,6b), and a push rod(2) is mounted between the valve and the electromagnetic coil. A coil spring(5) is mounted out of the push rod, and a power switch(8) is formed in the electromagnetic coil. A foot brake is converted into a parking brake in parking with regulating flow of brake oil by using the electromagnetic coil, and the brake is operated conveniently with actuating or releasing the brake simply by operating the switch. The accident is prevented with restricting automatic release of the brake.
Patent KR-20030054828-A (KR)
Title: Apparatus for Modem Analysis in Communication System and Method Thereof
Inventor: KIM YUN HUI
IPC: H04L27/00
Filed: 2001-12-26
Abstract: PURPOSE: An apparatus for analyzing a modem of a communication system and a method thereof are provided to reduce the manufacturing costs and time by processing a signal modulation/demodulation using a software. CONSTITUTION: A first control unit(110) generates a signal for analyzing a demodulator and a control signal for controlling storing units(130,140) and a signal generating unit(150). The storing units(130,140) control a memory and the flow of data according to a control signal and store the data. The signal generating unit(150) buffers a difference between a receiving speed of the signal from the storing units(130,140) and a transmitting speed of a signal to the demodulator and generates the signal received from the storing units(130,140) by adjusting an outside/inside clock. An interface unit(120) connects to the first control unit(110) to the storing units(130,140).
Patent KR-20020023205-A (KR)
Inventor: KIM HYO SEONG
IPC: G01D21/02
Filed: 2001-12-29
Abstract: PURPOSE: An apparatus and a method for measuring the temperature/depth of water are provided to increase the haul by measuring the temperature of water depending on the depth of the neighboring waters and the ocean and accurately checking the distribution of fishes depending on the depth and temperature of water. CONSTITUTION: An apparatus for measuring the temperature/depth of water comprises a temperature/depth measuring unit(100), a communication adapter(200), a communication cable(300), a data analysis and control unit(400), and a reproduction preventing unit(500). The temperature/depth measuring unit measures the temperature and depth of the seawater via a temperature sensor and a pressure sensor. The communication adapter charges the battery in the temperature/depth measuring unit and databases the measures values. The data analysis and control unit displays the temperature distribution depending on the depth of the seawater by analyzing the data transmitted from the communication adapter. The temperature distribution is databased. The data analysis and control unit performs the functions of fishing implement design, sensor connection, simulation, hooking master, work schedule management, and printing.
Patent KR-20020006018-A (KR)
Inventor: CHOI CHAN
Filed: 2001-12-31
Abstract: PURPOSE: A system for changing a discounting amount and a method thereof are provided to enhance a purchasing power and an image with respect to a paying site by checking a paying money and additionally discounting the paying amount in accordance with an activity of a paying person. CONSTITUTION: A subscriber terminal device making a person be connected to a server for a payment through a communication network, a web server, a charged service module, a commodity DB, a discounting method module for managing an activity with respect to an additional discount, a discount module applying an additional discount and calculating a paying amount of money are provided. The processing stages are described as follows. An amount of money to be paid is checked. An item to be applied to a discount amount of money is selected. An activity with respect to the selected item is performed. A result to the activity is checked. The result is transmitted to a server. A discounting amount of money is calculated. The final paying amount of money is decided. The final paying amount of money is charged.
Patent KR-20010106481-A (KR)
IPC: H01M50/564
Filed: 1999-07-23
Abstract: 종래의 전지체를 수납하기 위한 전지 용기(1)로서 적층 시트(sheet)재를 이용한 전지의 경우, 적층 시트재 중의 금속 박은 정극, 부극의 어느 것에도 접하고 있지 않고, 전위가 불안정하기 때문에, 전기 쉴드의 효과가 얻어지지 않는다고 하는 문제가 있었다. 
     본 발명은 전지 용기(1)의 밀봉부(3)의 기능을 손상하지 않도록 하기 위해서, 정극 리드 또는 부극 리드(4)와 중첩되는 위치에, 밀봉부(3)로부터 연장한 연장부(6)를 마련하고, 리드(4)와 연장부(6)를 관통하는 도전성 부품(5)에 의해 접합함으로써, 전지 용기(1)의 적층 시트재의 금속 박과 리드(4)를 전기적으로 접속하여, 전지 용기(1)의 전위를 정극 또는 부극의 전위로 유지하도록 하였다.
Patent KR-20010101551-A (KR)
IPC: H04L12/56
Filed: 1999-12-28
Abstract: 인터넷 프로토콜(IP)을 사용하는 망부분과 같은 패킷-교환망(PSN) 부분과 무선전화망 부분과 같은 회선-교환망(CSN) 부분을 가지는 통합 전기통신망에 배치되는 최종 단말기로부터 서비스를 액세싱하는 시스템과 방법에 관한 것이다. PSN부분은 CSN부분에 연결되는 게이트웨이를 가지는 음성을 통한 IP(VoIP)망으로 구현되는 것이 바람직하다. 서비스 또는 응용노드, 바람직하게는 서비스 제어 포인트(SCP)와, 서비스 데이터 포인트(SDP)와, 아니면 둘 다를 가지는 WIN/IN-기반 서비스 노드에 PSN부분과 동작할 수 있는 인터페이스가 제공된다. 최종 단말기와 관련된 호출 제어 상태 기계는 수정되어 WIN/IN-유연 DPS를 포함한다. 사용자 프로파일 저장기가 망에 제공된다. 최종 단말기의 호출 제어 프로세스가 아암드 DP를 조우하면, 서비스 액세스 서버의 일부로서 서비스 액세스 인스턴스를 생성하여 제어를 이로 전달하는데, WIN/IN 서비스 노드로서 제공되는 서비스 프록시가 요청을 서비스 논리 환경에 전송한다. 적절한 서비스 논리 부분을 수행하면, 서비스 노드는 결과를 서비스 액세스 서버로 리턴하고, 이는 이를 호출 제어 프로세스로 전달한다.
Patent KR-20010108151-A (KR)
IPC: G06F21/00
Filed: 2000-01-28
Abstract: A system for establishing a secure communication channel between a first user (102) and a second user (112) in an IP telephony network. The first user and the second user are coupled to first (104) and second (114) telephony adapters, which in turn, are coupled to first (106) and second (116) gateway controllers, respectively, wherein the gateway controllers control user access to the IP telephony network. The telephony adapters are used to encrypt and decrypt user information exchanged over the IP telephony network. The system includes a method which begins when a request is received at the first gateway controller to establish a secure communication channel between the first user and the second user. Next, a secret key (408) is generated at the first gateway controller. A copy of the secret key is distributed to the first and second telephony adapters over previously established secure connections. Finally, the secure communication channel is established (422) between the first user and the second user by encrypting and decrypting information using the secret key.
Patent KR-20010102010-A (KR)
IPC: H02M3/335
Filed: 2000-12-08
Abstract: 한 쌍의 직류단자(18, 19) 사이에 트랜스(2)의 1차 권선(21)과 스위칭 소자(3)와 전류 검출저항(4)의 직렬회로가 접속되어 있다.  트랜스(2)의 2차 권선(22)에 다이오드(6)를 통하여 평활용 콘덴서(7)가 접속되어 있다.  스위칭 소자(3)와 전류 검출저항(4)의 직렬회로에 병렬로 공진용 콘덴서(5)가 접속되어 있다.  전류 검출신호와 출력 전압 검출신호와 스위치 전압 검출신호(11)의 출력과의 합성에 근거하여 스위칭 소자(3)의 제어 펄스가 형성된다.  제어회로(13) 중에 제 1 및 제 2 최소 OFF 기간을 히스테리시스를 가지기 위한 최소 OFF 기간 결정회로가 설치되어져 있다.  작은 부하시에 있어 스위칭 소자(3)의 OFF 기간이 최소 OFF 기간에 의해 제한된다.  스위칭 소자(3)의 TURN ON시의 제로 볼트 스위칭은, 최소 OFF 기간이 경과하고 또한 트랜스(2)의 축적 에너지의 방출이 종료된 후에 행하여 진다.
Patent KR-20020007313-A (KR)
IPC: A61K39/00
Filed: 2000-02-22
Abstract: 본 발명은 알레르기성 질환의 치료, 예방 또는 개선을 위한 신규한 약제의 제공에 관한 것이다.  특히, 상기 신규한 약제는 IgE의 Cε2 도메인의 표면 노출된 영역의 에피토프 또는 미모토프를 혼입하고 있는 단리된 펩티드이다.  본 발명자들은 이러한 신규한 영역이 수동적 및 능동적 면역예방 또는 면역치료 둘 모두를 위한 표적이 될 수 있음을 발견하였다.  본 발명은 추가로 이들을 함유한 약제학적 조성물인 약제를 생성시키는 방법 및 의학적 용도로 사용되는 방법에 관한 것이다.  또한 본 발명의 일면은 리간드, 특히 모노클로날 항체(이들은 본 발명의 표면 노출된 IgE 영역과 결합할 수 있다)를 형성시키는 것, 그리고 수동적 면역치료 또는 면역예방에서의 이들의 의학적 용도이다.
Patent KR-20020012195-A (KR)
Title: 상품 기획 및 개발 시스템, 그 방법 및 컴퓨터 제품
IPC: G06Q30/06
Filed: 2001-03-02
Abstract: 본 발명은 상품 기획 및 개발 시스템, 그 방법 및 컴퓨터 제품에 관한 것이다. 상기 상품 기획 및 개발 시스템은 다수의 불특정 소비자(3 1 내지 3 n )에게 신상품의 기획 및/또는 개발에 관한 상품 기획 및 개발 정보를 인터넷(20)을 통해 고지하기 위한 WWW 서버(33)와, 상기 상품 기획 정보를 열람한 소비자(3 1 내지 3 n )의 의견 정보를 상기 인터넷(20)을 통해 수집하기 위한 뉴스 서버(35)를 포함한다. 상기 WWW 서버(33)는 상기 소비자(3 1 내지 3 n )에게 상기 의견 정보에 따른 소비자의 요구에 적합한 상품 정보를 상기 인터넷(20)을 통해 고지한다.
Patent KR-20020016787-A (KR)
IPC: H04W72/04
Filed: 2001-03-12
Abstract: 송신 장치(100)가 확산부(103)에서 통지 정보를 확산하고, 대역 제한 필터부(104)에서 확산 후 통지 정보의 대역을 가드 주파수 대역에 중첩시킴으로써 제한하고, 가산부(105)에서 역(逆)푸리에 변환 후의 송신 데이터에 대역 제한 필터부(104)의 출력 신호를 가산하고, 변조부(106)에서 변조하여 송신한다. 수신 장치(150)가 수신 필터부(154)에서 가드 주파수 대역의 신호만을 통과시키고, 복조부(155)에서 복조하며, 역확산부(156)에서 역확산하고, 레이크 수신부(157)에서 레이크 수신하여 통지 정보를 얻는다. 이에 따라, 가드 주파수 대역을 효과적으로 이용하여 주파수 이용 효율의 향상을 도모할 수 있다.
Patent KR-20020016867-A (KR)
IPC: H01L23/498
Filed: 2000-05-26
Abstract: 집적 회로 다이 및/또는 패키지에 관한 것으로, 중심 영역 및 외부 영역을 가진 기판을 구비한 장치가 기재되어 있다. 제1 다수의 전기적 커넥션은 기판의 외부 영역에서 제1 거리로 이격된다. 제2 다수의 전기적 커넥션은 기판의 중심 영역에서 제2 거리로 이격된다.
Patent KR-20020029872-A (KR)
Title: Power adaptive frequency divider
IPC: H03K23/66
Filed: 2001-04-13
Abstract: The power consumption of a frequency-divider can effectively be reduced when the frequency of the input signal varies by more than the division factor of a divider cell in the frequency divider. A low frequency input signal requires a lower division factor, and a divider cell in the frequency divider can be bypassed and switched off to obtain this lower division factor, thereby reducing the power consumption.
Patent KR-20030061949-A (KR)
Title: Method for controlling store of file in storage system
Inventor: LEE JONG HYEON
IPC: G11B20/12
Filed: 2002-01-14
Abstract: PURPOSE: A method for storing files in a storing system is provided to prevent entire data loss even if power fails when large volume of audio and video data are stored in an HDD. CONSTITUTION: A storage order of files and a new variable are set up to store large audio and video data in an HDD(Hard Disk Drive)(301). A storing operation is executed by cluster units(302). According to the order of the storage, it is confirmed whether the storage is completed in a first cluster(303). If so, the last cluster of file value representing completion of the storage of a file is stored at an FAT table corresponding to a cluster to be stored next(304). An FAT table address corresponding to the first cluster and another FAT table address corresponding to the cluster to be stored next are stored at the new variable(305). In the case that a capacity of the next cluster is filled with the input data, the stored values are read from the variable, and the address of the next cluster is stored at the FAT table address corresponding to the first cluster(306-308). The last cluster of file value is stored at the FAT table corresponding to the second cluster(309). If the entire files are normally stored, the variable of the file system is initialized and a loop is terminated(310).
Patent KR-20030063014-A (KR)
Title: Multi-line a vinyl resin auto supply machine
Inventor: HAN JONG SANG
IPC: B65H59/38
Filed: 2002-01-22
Abstract: PURPOSE: A film raw material wound in a roller is supplied and heated and cut automatically, and stopping of the supply is detected to prevent working error. CONSTITUTION: Transferring rollers(12,13) rotating by a transferring device transfers film wound in a roller(21) automatically, and heated in a sealing portion, and cut in a cutting portion. A raw material supplying detecting portion comprises a detecting signal line and a connection pin(25). A speed adjusting portion(30) adjust transferring of raw material by an optical sensor.
Patent KR-20030064037-A (KR)
Title: DAB receiver and apparatus for recording and reproducing digital audio signal thereof
Inventor: LEE DOO YEAL
IPC: G11B20/10
Filed: 2002-01-25
Abstract: PURPOSE: A DAB(Digital Audio Broadcasting) receiving device is provided to transmit a received digital audio signal and digital data to a digital contents device, and to maintain the digital audio signal and the digital data in digital type, thereby supplying an audio service having superior sound quality. CONSTITUTION: A digital demodulation processor(103) demodulates received digital contents. A layer converter(107) converts the demodulated digital contents into MPEG layer 3. A digital audio signal and digital data transmitter(108) transmits the outputted digital contents to a digital contents device. The digital audio signal and digital data transmitter(108) comprises as follows. A deck has a head(111), and drives the digital contents device. The head(111) transmits a control signal for driving the digital contents device with the digital contents to the digital contents device. A modulator(110) modulates the transmitted digital contents to a signal received in the head(111).
Patent KR-20020024205-A (KR)
Inventor: SON YOUNG SUK
IPC: B60R99/00
Filed: 2002-02-02
Abstract: PURPOSE: A multifunctional vehicle of a high technology digital is provided to improve satisfaction by having multi functions and to reduce time. CONSTITUTION: A multifunctional vehicle in a high technology digital comprises an aroma raw material reservoir(2); an aroma generator(2'); an aroma sensor(3); an alarm(6) generating sound according to input data by an alarm sensor(7); an actuation circuit control unit(8) automatically controlling an ozone generator(11) and an ozone operating sensor(12); a digital typed button controlling entire menu; a communicating chip(16); a remote controlling circuit(18); a digital cassette(17); a digital recorder(20); a digital telephone(25); a video recorder(27) preventing burglar; a drawer(30) receiving first aid medicine; a humidifier(32); an electric fan(33); a kneader(34); and a far-infrared ray generator(36). Thereby, the multifunctional vehicle of the high technology digital improves satisfaction by having multi function.
Patent KR-20030068226-A (KR)
Title: public wireless LAN service system and method using prepaid card
Inventor: JU DO WAN
IPC: G06Q40/02
Filed: 2002-02-14
Abstract: PURPOSE: A system and a method for a public wireless LAN service using a prepayment card are provided to make a user use the service conveniently and to easily make a charge for the wireless LAN service of the user. CONSTITUTION: A wireless LAN kiosk(100) includes a wireless LAN access point part(110) connecting to a wireless Internet user terminal(200_1-200_n) and a prepayment card selling part(120) issuing the prepayment card by using a vacant card and a PIN(Personal Identification Number). A prepayment card issuance server(500) is connected to the prepayment card selling part(120), controls a process for issuing the prepayment card, and transfers the PIN to the prepayment card selling part(120). A charge/authentication RADIUS(Remote Authentication Dial-In User Services) server(300) is connected to the access point part(110) and carries out the authentication for the user wanting to use the wireless LAN service and the charge of the wireless LAN service. A prepayment card issuance database(400) is respectively connected to the prepayment card issuance server(500) and the charge/authentication RADIUS server(300), and stores the prepayment card information.