baber/WOPTO huggingface dataset:
Patent KR-20020036442-A (KR)
Title: Internet HWATOO game chatting system
Inventor: KIM HUI BONG
Filed: 2000-11-09
Abstract: PURPOSE: A chatting system for an Internet Korean playing card game is provided to offer the friendly and effective cyber meeting space applying the video chatting on the Internet by making a user use the Korean playing card game as a connection medium while talking with each other. CONSTITUTION: The user can use a video chatting system including the Korean playing card game by connecting to a home site with a user computer and accessing with an assigned ID. The user makes a meeting or joins in the meeting and plays the game with a partner selecting from the participants. A screen for the game and the video chatting comprises a video realization part(10) displaying a figure of the users connecting to a selecting room and displaying a character(2) in case of refusing to display a real figure of the user, a Korean playing card game screen(11) displaying the progress status of the game and enabling the user to play the game, and a chatting screen(12) making the user feel face to face with the partner by playing the game and chatting with the partner simultaneously.
Patent KR-20020041198-A (KR)
Title: Remaining battery capacity compensator and method of controlling the same
Inventor: CHOO YEON CHEOL
IPC: G01R31/36
Filed: 2000-11-27
Abstract: PURPOSE: An apparatus for compensating residual capacity of a battery and a control method thereof are provided to calculate the residual capacity of the battery and correct an error thereof regardless of a used circumstance. CONSTITUTION: A display device(18) displays residual capacity of a battery. A voltage sensor(12) senses an output voltage of the battery. A current sensor(14) senses an output current. A temperature sensor(16) senses a temperature of the battery. A controller(10) calculates the residual capacity of a battery according to the output voltage and the temperature of the battery sensed by the voltage sensor(12) and the temperature sensor(16), respectively. A residual capacity correction table storage section(20) stores a residual capacity correction table which indicates relations of the charge and discharge number of the battery, the output voltage, current and the temperature of the battery.
Patent KR-20010062063-A (KR)
Inventor: ISHII KO
IPC: G11B7/125
Filed: 2000-12-01
Abstract: PURPOSE: To provide an optical pickup device which may be downsized and deals with two wavelengths without using combined prisms. CONSTITUTION: This optical pickup device 100 has a semiconductor laser element 50 which is a light emitting means integrated with a first light emitting source for emitting a first laser beam and a second light emitting source arranged in proximity to the first light emitting source to emit a second laser beam different in the wavelength from the wavelength of the first laser beam and an optical system comprising plural optical elements which form optical paths to guide the first and second laser beams to a recording medium and to lead the reflected beams reflected by the recording medium to a photodetector 70, i.e., a photodetecting means, and in which both of the first and second laser beams pass. The optical pickup device 100 is capable of reading the information in the recording medium varying in read wavelength. The photodetecting means is constituted to include nine division detecting parts 71 which are nine division detectors having nine photodetecting regions arrayed in three columns and three rows.
Patent KR-20020043718-A (KR)
Title: Fly wheel combination structure of gear train engine
Inventor: HWANG JUNG HYEON
IPC: F16F15/30
Filed: 2000-12-04
Abstract: PURPOSE: Structure for combining the flywheel of a rear gear train engine is provided to improve the combination of a flywheel by enlarging the radius of combination of a bolt, and to secure torque enough to transmit the rotational force of an engine to a load. CONSTITUTION: In a rear gear train engine, a crank gear(2) is interferingly fitted to a crank shaft(1), and a train gear(3) for power transmission is engaged with the crank gear. A combining unit(4) is formed in the trapezoid shape for the combination of an adapter(5). The adapter has a face(5c) formed wide for the combination of a flywheel(6). The other face(5b) of the adapter is formed in a diameter the same as that of the crank shaft. The flywheel is combined to the adapter via a wheel bolt(8). The combing radius of the wheel bolt is formed wide by making the wheel bolt combined through the outermost angle of the face of the adapter.
Patent KR-20020046393-A (KR)
Title: Extraction Apparatus For Essential Terpene-oil
Inventor: YOON SEUNG YEOL
IPC: B01D11/00
Filed: 2000-12-13
Abstract: PURPOSE: Provided is an extraction device for plant terpene essential oil which enables the extraction of highly pure plant terpene essential oil in a short period of time, making the increased oil recovery percentage and reducing the extraction cost. CONSTITUTION: The device comprises: a pressure tank(200) which keeps the plant terpene essential oil; a vacuum pump(300) which is connected to the above pressure tank(200) and reduces the pressure in the above pressure tank(200); the steam supplying device to supply high temperature steam to the above pressure tank(200); a heat-exchanging condenser(400) connected to the above pressure tank(200) which condenses the high temperature/high pressure steam containing the extracted terpene essential oils from the above raw material; a cooling water device(500) to cool the above heat-exchanger condenser; and a separator of oil and water(600), connected to the above heat-exchanging condenser, which separates terpene essential oil, water and impurity from the condensed water in the heat-exchanging condenser.
Patent KR-20020049903-A (KR)
Title: A METHOD FOR MANUFACTURING Cr-Mo STEEL FOR HIGH TEMPERATURE APPLICATIONS
Inventor: JANG UNG SEONG
IPC: C21D8/02
Filed: 2000-12-20
Abstract: PURPOSE: Provided is a production process of Cr-Mo steel with intermediate and high temperature which adds Ca to steel with controlling the ratio of Ca/S so that it improves the strength of steel. CONSTITUTION: The production process of Cr-Mo steel with intermediate and high temperature comprises the steps of: (i) reheating steel wherein 0.06-0.15wt% of C, less than 0.04wt% of Si, 0.1-1.0wt% of Mn, 1.8-3.5wt% of Cr, 0.8-1.6wt% of Mo, less than 0.02wt% of Al, less than 0.010wt% of P, less than 0.006wt% of N, less than 0.005wt% of S, less than 0.05wt% of Ca, residual Fe and other impurities are included with meeting the weight ratio of Ca/S as 1-10; (ii) hot rolling in a non-crystallization temperature range at 5-30% in reduction rate; and (iii) directly quenching at 5-30deg.C/sec in cooling speed and tempering at 650-750deg.C.
Patent KR-20020052463-A (KR)
Title: Manufacturing method for semiconductor device
Inventor: KIM JAE YEONG
IPC: H01L21/336
Filed: 2000-12-26
Abstract: PURPOSE: A fabrication method of semiconductor devices is provided to easily achieve a processing margin and a vertical profile by using a mask insulator of ONO stacked structure. CONSTITUTION: A gate insulator, a conductive layer, a first mask insulator are sequentially formed on a semiconductor substrate(11). A second and a third mask insulators are formed on the resultant structure, wherein the first, second and third mask insulators have different etching selectivity. A third mask insulating pattern and a second mask insulating pattern(18) are formed by using a photoresist pattern for defining a gate as a mask. After removing the photoresist pattern, a first mask insulating pattern(16) is formed by using the third mask insulating pattern, and the second mask insulating pattern(18) is simultaneously exposed. A gate electrode(14) is formed by etching the conductive layer using the exposed second mask insulating pattern(18) as a mask.
Patent KR-20020055636-A (KR)
Title: Blower unit structure for an air conditioning system of an automobile
Inventor: CHOI JAE SIK
IPC: B60H1/32
Filed: 2000-12-29
Abstract: PURPOSE: A structure of blower unit of air conditioning system for automobile is provided to reduce installation space for components in an air duct by integrating an evaporator core and a heater core installed in the air duct. CONSTITUTION: An evaporator core(30) with cooling fins(51) placed in horizontal direction; and a heater core(40) are alternately installed in an integral core body(50) so that refrigerant and coolant are supplied in opposite directions. The integral core body is used as a heater or an air conditioner depending on whether refrigerant or coolant is supplied to the integral core body having the evaporator core and the heater core integrally in a single body.
Patent KR-20010110628-A (KR)
Inventor: CHO IL YONG
Filed: 2000-12-30
Abstract: 본 발명의 공기조화기는, 듀티제어신호에 따라 펄스폭변조방식으로 제어되는 압축기, 압축기에서 압축된 냉매를 팽창시키는 전동팽창밸브를 포함한다. 압축기의 토출측과 전동팽창밸브의 유입측은 고압관으로 연결되고, 전동팽창밸브의 유출측과 압축기의 흡입측은 저압관으로 연결된다. 바이패스관의 일단은 고압관에 연결되고 타단은 저압관에 연결되며, 바이패스관의 중도에는 유량조절밸브가 설치된다. 제어부는 압축기의 기동운전을 2단계로 수행하여 제1기동운전에서는 유량조절밸브는 열고 전동팽창밸브를 닫고, 제2기동운전에서는 유량조절밸브는 닫고 전동팽창밸브는 대략 17%의 개도로 열도록 제어하고, 압축기를 정상운전보다 짧은 주기의 듀티제어신호로 제어한다. 압축기의 제2기동운전 중의 로딩 타임과 언로딩 타임의 비는 대략 5:5 이다.
Patent KR-20010023564-A (KR)
Title: 일체형 음향 시스템을 구비한 차량 패널
IPC: B60R11/02
Filed: 1998-08-24
Abstract: 트림패널과, 차량탑승자실을위한 지붕라이닝과 트림패널은 음향출력을 생성하기위해 공진을 일으키는 라디에이터내에 굴곡파를 발산하기위한 라디에이터상에 장착된 일체음향 라디에이터와, 진동여자기로 구성되고, 라디에이터와 일체인 수단은 라디에이터주변을 한정한다.
Patent KR-20010030736-A (KR)
Title: 차량 속도 제어 방법 및 장치
IPC: B60T8/00
Filed: 1999-06-18
Abstract: 차량 속도 제어 방법 및 장치가 제안되고, 이런 제어는 실제값의 제어 범주 내에서 표준값으로 제어한다.  구동 유닛과 구동 휠 사이에 동력 전달이 중단됐을 때, 조정기의 효력은 차단된다.  동력 전달의 재개시에 조정기는 자동적으로 연결된다.
Patent KR-20010032551-A (KR)
Title: 약제 공급 장치
IPC: G07F9/02
Filed: 1999-09-21
Abstract: 약제가 잘못 공급되어 버리는 결점을 용이하면서도 확실하게 방지할 수 있는 약제 공급 장치를 제공한다.  약제 공급 장치는 약제를 수납하는 수납 용기 및 이 수납 용기로부터 약제를 한 개씩 배출하는 배출 드럼을 갖는 정제 케이스를 본체의 케이스 수납부에 복수 수납하여 이루어지는 것으로써, 각 정제 케이스에 각각 설치되고, 해당 정제 케이스를 식별하기 위한 식별 데이터가 기록된 메모리와, 본체에 설치되고, 각 정제 케이스의 메모리 내의 식별 데이터에 의거하여 해당 정제 케이스를 식별하고, 각 정제 케이스의 배출 드럼의 구동 제어를 실행하는 제어 장치를 구비한다.
Patent KR-20010033612-A (KR)
Title: 신디오택틱 폴리프로필렌 다층 포장 필름
IPC: B32B27/32
Filed: 1998-12-08
Abstract: 본 발명은 (i) 고밀도 폴리에틸렌의 코어 기재; 및 (ii) 상기 코어 기재중 하나 이상의 면에 신디오택틱 폴리프로필렌의 추가 층을 갖는 2축 배향된 다층 필름 구조체에 관한 것이다.  선택적으로, 본 발명의 필름은 추가 층의 외면상에 하나 이상의 열 밀봉가능한 층을 포함한다.
Patent KR-20010033753-A (KR)
Title: 음극선관을 위한 레이저 조명 장치
IPC: G02B27/00
Filed: 1999-10-27
Abstract: 음극선관의 또는 음극선관을 위한 감광층(photosensitive layer)이 레이저 조명 장치에 의하여 조명된다. 레이저 조명 장치는 레이저빔의 간섭성(the coherence)을 줄이는 역할을 하는 균광기(homogenizer)를 포함한다.
Patent KR-20010040441-A (KR)
Title: 열경화물의 중합 반응 완료를 위한 발색 지시약
IPC: C09J163/00
Filed: 1999-01-08
Abstract: 본 발명은 염기 촉매화 에폭시 열경화성 수지계의 경화 및 중합 반응 완료를 위한 지시약에 관한 것이다. 특히, 본 발명은 각종 에폭시 수지계에 사용되는 경화제와 염 또는 착물을 형성하는 아미노기를 갖는 디아조 염료를 사용한다. 경화제의 완전 중합 반응 및 소비를 완료한 후, 염료의 발색단 변이를 관찰할 수 있다.
Patent KR-20010041488-A (KR)
Title: 1,2,4-부탄트리올의 제조 방법
IPC: C07C29/147
Filed: 1999-02-25
Abstract: 본 발명은 1,2,4-부탄트리올을 안전하고, 간편하게, 염가에 또 배수 문제를 초래하지 않고 취득할 수 있는 방법을 제공하는 것을 목적으로 한다.  하기 화학식 I로 표시되는 말산디에스테르, 3-히드록시-γ-부티로락톤, 3,4-디히드록시부탄산에스테르 또는 이들 화합물의 2 이상의 혼합물을 유기용매 중에서 수소화붕소나트륨에 의해 환원하여 하기 화학식 II로 표시되는 1,2,4-부탄트리올을 얻는다.  상기 출발 화합물로서 광학 활성체를 이용한 경우, 환원 반응 중에 라세미화는 실질적으로 일어나지 않고, 광학 활성 1,2,4-부탄트리올을 얻을 수 있다. 
     화학식 I 
     
       
     
     화학식 II
Patent KR-20010042391-A (KR)
Title: 버퍼 보호 장치 및 방법
IPC: G06F9/46
Filed: 1999-03-08
Abstract: 본 발명은 디지털 모듈로부터의 첫번째 숫자(x)의 메시지를 저장할 수 있는 선입선출형의 버퍼의 오버플로우의 보호 장치 및 방법에 관한 것이다. 상기 방법은 제1 유닛 자체로 어드레스되는 디지털 모듈로부터 버퍼로 페이스 메시지를 생성 및 전송하여, 메시지가 전송되고 다시 수신되는 페이스의 트랙을 유지하는 것을 특징으로 한다. 페이스 메시지를 전송하는 기준은 전송 메시지의 수에 기초한다. 메시지의 전송은 전송 페이스 메시지의 수 및 수신 페이스 메시지의 수에 기초하는 기준이 버퍼를 오버로드할 위험이 있는 것으로 결정하면, 정지된다. 상기 장치는 페이스 메시지를 생성하는 수단, 페이스 메시지를 전송하는 페이스 전송기, 페이스 메시지를 수신하는 수신기 및 메시지 전송 프로세스를 정지시키는 수단을 포함한다.
Patent KR-20010043708-A (KR)
Title: 이중 주파수 플라즈마 에칭 챔버에서 금속 산화물의 환원
IPC: H01L21/302
Filed: 1999-05-14
Abstract: 본 발명은 기판상에 형성된 산화물, 특히 구리 산화물과 알루미늄 산화물을 제거하는 장치 및 방법을 제공한다.  주로, 본 발명은 상호 연결 미세구조물의 바닥으로부터 상호 연결 미세구조물의 측면 벽 상에 구리 산화물의 스퍼터링을 제거하여, 상기 구리 원자의 유전체 재료를 통한 확산과 상기 장치의 성능 저하를 방지한다.  또한 본 발명은 결국에는 박리되고 상기 기판에 결함을 야기할 상기 챔버의 측면 벽에 구리 산화물의 스퍼터링을 제거한다.  기판 표면으로부터 금속 산화물을 환원시키는 방법은 플라즈마 처리 챔버 내에 상기 기판을 위치시키는 단계, 수소를 포함하는 처리 가스를 상기 챔버로 유입하는 단계, 및 유도 커플링을 통해 상기 챔버 내에서 상기 처리 가스의 플라즈마를 유지시키는 단계를 포함한다.  상기 방법은 바람직하게 상기 구리 산화물의 스퍼터링을 제거하고 상기 산화 반응을 최대화하도록 상기 처리 가스의 유동, 상기 고주파 전력 및 배기 펌프의 속도에서 조절되는 이중 주파수 에칭 챔버를 이용하여 수행된다.
Patent KR-20010025102-A (KR)
Title: 이온도전성 고체고분자용 조성물, 이온도전성 고체고분자전해질, 바인더수지 및 2차전지
IPC: H01B1/12
Filed: 2000-03-22
Abstract: 높은 이온도전성과 높은 점착성과 우수한 형상유지성을 구비한 옥시알킬렌사슬을 갖는 폴리비닐알콜 단위를 갖는 고분자화합물, 이 고분자화합물과 이온도전성염과 가교가능한 관능기를 갖는 화합물을 주성분으로 하는 이온도전성 고체고분자용 조성물 및 이온도전성 고체고분자 전해질, 고분자 화합물과 가교가능한 관능기를 갖는 화합물을 주성분으로 하는 바인더수지 및 이들로부터 구성되는 2차전지를 제공한다.
Patent KR-20020057593-A (KR)
Title: Method for alternative digital modulation/demodulation
Inventor: SHIN HO GYUN
IPC: H04L27/32
Filed: 2001-01-02
Abstract: PURPOSE: A method for applying variably a digital modulation/demodulation method in a mobile communication system is provided to switch the digital modulation/demodulation method to a 16QAM method according to a measured result by measuring an S/N(Signal to Noise) ratio of a received signal. CONSTITUTION: A call service is connected in mobile communication(S11). A data transmission and reception process is performed between terminals and an S/N ratio of a signal received from the terminal is measured(S13). A state of a radio channel is checked by comparing the measured value of the S/N ratio with a reference value stored in the terminal(S15,S17). An existing QPSK digital modulation/demodulation method is maintained if the radio channel is in the normal state(S19). The existing QPSK digital modulation/demodulation method is switched to 16QAM if the radio channel is in the abnormal state(S21).
Patent KR-20020057442-A (KR)
Title: Method for processing a user key input in automatic teller machine
Inventor: KIM BYEONG YEOL
Filed: 2001-01-04
Abstract: PURPOSE: A method for processing a key input in an ATM is provided to increase the processing speed by processing an emulation of an issuing/recognition operation of a key inputted through a user console using a user library. CONSTITUTION: An ATM(Automated Teller Machine, 200) is equipped with a card reader unit(20), a user console(21), a CPU(22) and an interface unit(23). The card reader unit(20) reads information recorded in a cash card or a credit card. The user console(21) includes a keyboard(211) and a touch panel(212) for selecting and inputting a desired function or a key value. The CPU(22) includes a plurality of application program and a user library for recognizing and executing the function and the key value selected and inputted from the card reader unit(20) and the user console(21). The interface unit(23) performs a transmission/reception of data between the CPU(22) and a host.
Patent KR-20020061809-A (KR)
Title: Hub cavitation proof apparatus using propeller small fins
Inventor: KANG CHANG SU
IPC: B63H1/18
Filed: 2001-01-18
Abstract: PURPOSE: A hub cavitation producer using a propeller-auxiliary pin is provided to reduce hub cavitation, to prevent corrosion of a steering wheel, and to prolong the life. CONSTITUTION: In forming a marine propeller(P), an auxiliary pin is installed to the hub(20) connection between vanes(10,10') of the propeller and spiral flow is formed small. Therefore, corrosion of a steering wheel is prevented. The rake of the auxiliary pin has a 15-degree difference in the rake between the rakes of the propeller vanes. The life of the steering wheel is prolonged by reducing occurrence of hub cavitation and the cost of repairing for maintenance of the propeller is reduced.
Patent KR-20010044258-A (KR)
Inventor: KIM HA MI
IPC: H04M1/23
Filed: 2001-01-29
Abstract: PURPOSE: A character input system using telephone type key pad is provided to avoid a duplicating arrangement of consonants on the key pad and set efficiently the order of consonants according to a duplicated input of the key pad input key, thereby enhancing the utility for searching the initial consonant. CONSTITUTION: A key pad(10) includes the first consonant key arranged at least two Korean consonant characters, the second consonant key arranged a Korean consonant character and a collection key for forming a Korean vowel sound. A control unit (20) recognizes the Korean characters arranged in duplication to the corresponding first consonant key by the order of consonants except for overlapped consonants and plosives, overlapped consonants, and plosives of Korean characters when inputting the first consonant key in duplication. A memory(30) stores a program data for inputting characters, information on characters capable of impacting and data inputted during the input of character.
Patent KR-20020063651-A (KR)
Title: Waste Water disposal plant
Inventor: KIM YOUNG HO
IPC: C02F1/30
Filed: 2001-01-30
Abstract: PURPOSE: A wastewater treatment unit is provided to recycle treated water as industrial water by treating livestock and industrial wastewater and waste leachate using physical, chemical and electromagnetic methods, and utilize the mixture as compost by mixing sludge with soil conditioner, thereby completely treating wastewater. CONSTITUTION: The wastewater treatment unit is characterized in that bonding force between oxygen and hydrogen molecules of wastewater is broken to quickly separate sludge after the lapse of a certain period of time by the process of grounding one oscillating frequency(15-1) oscillated in a frequency oscillatory circuit unit(15) onto the inner surface of the tank(11) in a tank(11) having a certain sized receiving space and outputting oscillating wave form of another oscillating frequency(15-2) into wastewater by waveform transmitting plates(13) floated on the upper part of wastewater owing to buoyance, wherein contaminants in wastewater is separated and settled by complicated actions such as oxidation, reduction and gas generation due to electrolysis caused by the processes of connecting +DC power supply(16-1) to stainless steel plates(12-2) arranged inside the tank(11) and connecting -DC power supply(16-2) to magnesium plates(12-2) and aluminum plates in a DC converter(16); and automatically converting current and voltage values by resistance values of wastewater in outputting a voltage of DC 12 to 50 V at the same time as the above operations, thereby protecting safety of the DC converter(16).
Patent KR-20020063717-A (KR)
Title: Neck sealing apparatus
Inventor: PARK YEONG OK
IPC: H01J9/24
Filed: 2001-01-30
Abstract: PURPOSE: A neck fusing facilities is provided to hold a flare type neck without damage to the flare type neck. CONSTITUTION: A neck fusing facilities comprises a chucking element(30), a neck holder(34), a holder support(40), and a neck transporting unit(45). The chucking element(30) is inserted into a flare type neck having a pipe part and a cone part for chucking the neck. The neck holder(34) holds the neck. The holder support(40) supports the neck holder(34). The neck transporting unit(45) moves the neck held by the neck holder(34) to the bottom of the chucking element(30) in its axis direction. The neck holder(34) includes a hollow main body(35) into which the pipe part of the neck is inserted, and a connecting unit(38) for interconnecting the hollow main body(35) and the holder support(40). The neck transporting unit(45) is a rotating cylinder(45).
Patent KR-20020065281-A (KR)
Title: A filter for a display, a method for preparing the same and a display comprising the same
Inventor: CHO YUN HYEONG
IPC: H01J11/24
Filed: 2001-02-06
Abstract: PURPOSE: A filter film for a display, a manufacturing method thereof and a display having the same are provided to improve contrast by absorbing lots of superposed wavelengths of phosphor luminous peaks. CONSTITUTION: A filter film(50a) for a display is formed between a panel(10) and a phosphor film(30). An electron beam is projected to the inner surface of the panel(10). The phosphor film(30) is formed on the inner surface of the panel(10) with R, G and B phosphor. For the filter film(50a), metal particles of nano size are attached on oxide particles. When the phosphor is emitted by an electron beam, surface plasma resonance phenomenon is induced such that light of particular wavelengths is selectively resonant-absorbed at the interface between the metal/oxide particles. The filter film(50a) contains two or more kinds of the metal particles or the oxide particles to selectively absorb two or more wavelengths as 580 nm and 500 nm.
Patent KR-20020066846-A (KR)
Title: Break system in the Electric Vehicle using the motor's regenerative and mechanical breaking system
Inventor: LEE BONG U
IPC: B60L7/26
Filed: 2001-02-14
Abstract: PURPOSE: An electric vehicle brake system is provided to achieve improved stability and efficiency, while lengthening useful life of battery and mechanical brake device and save energy. CONSTITUTION: An electric vehicle brake system comprises a regenerative braking force control unit for receiving a signal from a brake pedal and information on the battery state and motor rotation speed, and calculating regenerative braking force; a torque converter for receiving information on the mechanical brake torque from the regenerative braking force control unit, and operating the brake through a brake controller; and an inverter for transducing the DC power of battery into an electric power required for rotating the motor, and generating a regenerative braking force of motor in accordance with the information on the regenerative braking force received from the regenerative braking force control unit.
Patent KR-20020066861-A (KR)
Title: custom recall method, and system for the same
Inventor: BAE GI CHEOL
IPC: H04W4/02
Filed: 2001-02-14
Abstract: PURPOSE: A client recall method and a system therefor are provided to improve the sales of a shop by transmitting a message for guiding recall to a mobile terminal of a client who uses the shop once. CONSTITUTION: A position server continuously traces the position of a mobile terminal located in a valid service area of a service server and provides position trace information to the service server(S2). The service server receives position trace information from the position server and analyzes position trace information(S3). If a specific terminal enters in a message transmission service area of a registered specific shop(S4), the service server transmits identification information of the entered mobile terminal to a shop terminal of the message transmission service area in which the mobile terminal is located(S5). The shop terminal receives identification information of the mobile terminal, compares received identification information with several identification information stored in its storing region, and grasps whether an identification number of the mobile terminal exists(S6). If the identification number of the mobile terminal exists(S7), the shop terminal retrieves past settlement history information linked with the identification number(S8). The shop terminal generates a message including the past service use history of a client and a sentence for guiding recall on the basis of past settlement history information of the mobile terminal(S9), and opens a unidirectional channel to the mobile terminal for transmitting the generated message(S10). The shop terminal transmits the generated message through the opened unidirectional channel(S11).