baber/WOPTO huggingface dataset:
Patent KR-20010101086-A (KR)
IPC: F04D29/30
Filed: 1999-11-05
Abstract: 임펠러(10)는 펌프 챔버(54) 및 펌프 흡입부(56)를 포함하는 원심펌프(50)에서 사용하기에 적당하다.  임펠러(10)는 설치될때 임펠러(10)의 주 몸체 부분(12)으로부터 펌프 흡입구(56)이내로 돌출한 복수의 제 1 펌프 블레이드(16) 또는 베인 및 하나이상의 유량 유도 블레이드(20) 또는 베인을 포함하는 주 몸체 부분(12)을 포함한다.
Patent KR-20010101236-A (KR)
IPC: G09G3/00
Filed: 2000-10-18
Abstract: 액정표시장치의 기판의 대형화의 추세하에, 간이한 수단, 장치로 도전성 패턴상의 절연층의 핀홀을 발견하여 수복한다. 
     그 해결수단으로서, 
     ①기판상의 특정 영역에 약액을 체류시켜서 지지하고, 약액에 전극판을 접촉 접근시켜서 낱장으로 전기처리 그리고 핀홀검사를 가능하게 한다.  그리고, 약액을 체류시키는 기구는 4종류이다. 
     ② 되형상의 용기내에서 약액을 처리하여 약액미스트의 발생을 저지한다. 
     ③ 양극산화 등으로 형성한 절연체로, 도전성 패턴상의 절연층을 메운다. 
     ④ 핀홀내의 주사선(및 공통용량선 또는 대향전극)을 전기화학처리로 불활성화한다.
Patent KR-20010111091-A (KR)
IPC: B21D39/04
Filed: 1999-12-13
Abstract: 본 발명은 거의 이동이 없이 서로 결합되는 2개의 관형 부분(1,2)의 반경방향 팽창에 의해서, 상기 부분(1,2)의 축방향에서 서로 이격되는 부분들의 적어도 2개의 영역에서 상기 부분들의 중간벽(5)의 부분에 의해 상기 부분(1,2)의 원주를 따라서 서로 분리되는 부분(1,2)의 반경방향 외향으로 돌출되는 2개의 작은 돌출부(4)를 구성하는 방법에 관한 것이다.  상기 작은 돌출부(4)는 팽창기 축방향에서 서로 이격되는 2개의 보스로 각각 정렬되는 가요성 브레이드를 가지는 팽창기를 포함하는 공구를 사용하여서 상기 관형 부분(1,2)의 축방향에서 이격되는 2개의 영역을 동시에 형성한다.  특히, 본 발명은 연료 조립체의 안내관(2)위에서 단부 슬리브(1)를 고정하는데에 특히 유용하다.
Patent KR-20010099980-A (KR)
IPC: C07H3/02
Filed: 2000-10-25
Abstract: 본 발명은 내열성 및 내알칼리성이 있는 비결정성(non-crystalline) 폴리올 시럽의 제조방법에 관한 것으로, 당 시럽(sugar syrup)의 수소화 단계, 및 상기 수소화된 설탕시럽의 카라멜화 단계로 구성되는 제조방법에 관한 것이다.  본 발명은 상기 수소화 및 카라멜화된 당 시럽이 이온 교환 수지로 정제를 수행하고, 상기 정제가 50 ℃ 미만의 온도에서 강양이온 수지의 적어도 한번 이상 수행하고, 상기 온도는 비결정성 폴리올 시럽에 있어 목적하는 환워당의 비율에 따라 선택되는 것을 특징으로 한다.  또한 본 발명은 상기 얻어진 폴리올 시럽을 치약의 제조에 이용하는 용도에 관한 것이다.
Patent KR-20010101445-A (KR)
Title: 차량 내에 발생된 열에너지를 전달하기 위한 전달 방법과전달 장치
IPC: F01P5/12
Filed: 2000-10-19
Abstract: 본 발명은 차량 내에 발생된 열에너지를 전달하기 위한 전달 방법과 전달 장치에 관한 것이다.  예를 들어, 펄스 변조기와 같은 전자 부품(42)에서 버려진 열은 내연기관(12)이나 승객실과 같은 다른 차량 부품을 가열하기 위하여 사용된다.  바람직한 실시예에 있어서 열 유동을 제어하기 위하여 서로 연결되거나 분리될 수 있는 두 개의 냉각 사이클(10, 40)이 제공된다.
Patent KR-20010104346-A (KR)
Title: Method and apparatus for production of labels
IPC: B65H45/09
Filed: 2000-02-23
Abstract: The present invention provides a method and apparatus for producing individual folded labels from a ribbon of labels designed to satisfy the aforementioned needs. The label is formed by first providing a ribbon of labels with at least one folded over portion and then subjecting the folded ribbon to heat and pressure to set the fold. The folded pressed ribbon is then subdividing into individual labels. In an alternative embodiment, the folded and pressed ribbon can be rerolled and shipped to an end user for use in an auto-sewing device. The present invention further includes an apparatus for carrying out this method and a finished label.
Patent KR-20010113041-A (KR)
Title: 개스킷을 사용하지 않는 렌즈 몰딩 장치 및 방법
IPC: B29C37/00
Filed: 2000-03-17
Abstract: 렌즈의 모든 파워 및 기하학적 형상을 형성하는데 사용될 수 있는 개스킷을 사용하지 않고 렌즈를 주조하는 장치 및 방법에 관한 것이다.  슬리브형 구조체를 형성하기 위해 두 개의 몰드(40, 50)의 에지 주위를 감싸는데 탄성중합체 스트립(20)이 사용되며, 이 슬리브형 구조체는 그 뒤 몰드(40, 50)와 협동하여 성형 캐비티(31)를 형성한다.  또한, 이 슬리브형 구조체는 렌즈 중합반응 공정동안 찌부러지거나 또는 수축되지 않는다.  대신에, 이것은 렌즈 중합반응 공정동안 발생하는 수축에 대해 보상하도록 몰드(40, 50)가 그 내에서 축방향으로 슬라이딩하도록 한다.
Patent KR-20020013541-A (KR)
IPC: C07J9/00
Filed: 2000-05-05
Abstract: 본 발명은 제약상 활성인 14β-H-스테롤, 그를 포함하는 제약 조성물, 및 약제 제조에 있어서 이들 신규 화합물의 용도에 관한 것이다.  보다 특별하게는, 본 발명의 14β-H-스테롤을 감수분열 조절에 이용할 수 있다는 것을 발견하였다.
Patent KR-20020036947-A (KR)
IPC: H04W88/02
Filed: 2000-05-18
Abstract: 본 발명에 따른 바람직한 팩스/데이터 인터페이스 장치(10)는 무선로컬루프(WLL) 상에서 종래의 아날로그 팩스머신(20)의 사용을 가능하게 한다. 무선로컬루프(12)에 포함된 WLL 터미널(14)은 텔레폰 라인(16)을 가지며, 이 텔레폰라인(16)에는 아날로그 텔레폰 포트(18), 아날로그 팩스머신(20)이 연결되며, WLL 터미널(14)의 데이터 포트(26)와 텔레폰 라인(16) 사이에 팩스/데이터 인터페이스(10)가 연결된다. 이 인터페이스(10)는 팩스머신(20)으로부터 텔레폰 라인(16)을 통해 아날로그 팩스신호를 수신하여, 이 수신된 아날로그 팩스신호를 디지탈 팩스신호를 변화하여 무선 PCS 전달을 위해 WLL 터미널(14)의 데이터포트(26)로 전달한다. PCS 전달에 의한 디지탈 팩스신호의 수신에 반응하여 WLL 터미널(14)은 데이터포트(26)를 통해 디지탈 팩스 신호를 인터페이스(10)에 전달하며, 이 인터페이스(10)는 디지탈 팩스신호를 아날로그 팩스신호를 변환하고, 텔레폰 라인(16)을 통해 팩스머신(20)으로 전달한다.
Patent KR-20020012291-A (KR)
Title: Substituted benzimidazole
IPC: A61K31/415
Filed: 2000-06-09
Abstract: Compounds of formula Iare suitable for the production of pharmaceuticals for the prophylaxis and therapy of disorders in whose course an increased activity of NFkappaB is involved.
Patent KR-20030061207-A (KR)
Title: Sheet for LCD backlight guide panel and its manufacturing method
Inventor: CHOI SOO IN
IPC: G02F1/1335
Filed: 2002-01-11
Abstract: PURPOSE: A pattern sheet for manufacturing a light guide plate of an LCD back light and a method for manufacturing the same are provided to improve the productivity, and reduce the manufacturing cost. CONSTITUTION: One side of an etching sus sheet is mirror-surface processed, cleaned, and dried. A dry film is bonded to a surface of a mirror surface of the sus sheet. A pattern film having printed patterns are placed on the dry film and then the sus sheet is exposed. The exposed sus sheet is developed, etched, and removed for obtaining a pattern sheet(11) on which patterns are engraved. The pattern sheet is mounted at a metal mold(71) and an acryl light guide plate is injection molded, so that embossed patterns are formed on one side of the acryl light guide plate.
Patent KR-20020023341-A (KR)
Inventor: SON YOUNG SUK
IPC: A41D1/06
Filed: 2002-01-17
Abstract: PURPOSE: A lower garment with a velcro band is provided to freely and conveniently adjust and fasten the size of waist of the lower garment including pants without using any belt. CONSTITUTION: The lower garment(1), for example pants, comprises an inside velcro band(2), an outside velcro band(3) opposite the inside velcro band, and a handle member(4) attached to the outside velcro band to allow the outside velcro band to be engaged with the inside velcro band or be released from the inside velcro band. Additionally, the inside velcro band is provided with plural female type hooks, and the outside velcro band is provided with a male type hook.
Patent KR-20020062217-A (KR)
Title: Pressure breaking sensor for battery
Inventor: AZEMA TADAMITSU
IPC: H01M10/48
Filed: 2002-01-18
Abstract: PURPOSE: To simplify a protection network without exploding a battery during charging and fracturing IC parts or the like of an electric apparatus during discharging by providing a fuse for cutting off a cable way when a current of a predetermined value or more passes. CONSTITUTION: In this pressure cutoff sensor for the battery, since an insulating substrate 11 is fractured and the cable way of a cutoff path 13 is cutoff by displacement of a pressure sensing means D by an internal pressure rise of a cover member and the cable way of the cutoff path 13 is cutoff when a current of the predetermined value or more passes, when the battery is used in an electric apparatus and if a current of the predetermined value or more passes during usage, the cutoff path 13 of the fuse H is cut off and fracture or ignition of the IC parts or the like used in the electric apparatus is prevented.
Patent KR-20030064543-A (KR)
Title: Micro-Computer With Keyboard Controller
Inventor: KANG SEONG CHEOL
IPC: H03M11/22
Filed: 2002-01-28
Abstract: PURPOSE: A microcomputer embedding with a keyboard controller is provided to support various system models with single keyboard BIOS(Basic Input/Output System) by storing the information of the various system models in a nonvolatile memory module. CONSTITUTION: A system(70) comprises a CPU and a main chipset. The microcomputer(40) is embedded with the nonvolatile memory module(44) and a keyboard control module(42). The system(70) and the microcomputer(40) are connected through two interfaces(72,74). The nonvolatile memory module(44) is an RTC/CMOS(Real Time Clock/Complementary Metal-Oxide Semiconductor) type, and stores a state of the microcomputer(40), the functions set to the keyboard control module(42), and the design selection information to change and design various kinds of keyboard BIOSs.
Patent KR-20030066159-A (KR)
Inventor: KIM JONG BEOM
IPC: A46B13/00
Filed: 2002-02-04
Abstract: PURPOSE: Provided is an automatic toothbrush which is inserted into the mouth by which a user brushes teeth by simply holding the toothbrush between teeth in the mouth. CONSTITUTION: The toothbrush has a main body(1) to be inserted into the mouth between upper and lower teeth. Into a tooth inserting part(1-1), teeth are inserted. On the side walls of the tooth inserting part, brushes are provided. Accordingly total four toothbrushes are provided at the tooth brush. The brushes rotate and move by a motor which is turned on and off by a switch(3). The four rotating brushes clean upper teeth and lower teeth at the same time by turning on the switch(3) without using a hand.
Patent KR-20020070812-A (KR)
Inventor: SASAKI HIDESHI
IPC: A01D34/90
Filed: 2002-02-25
Abstract: PURPOSE: To reduce the vibration transmitted from a motor of a bush cutter to an operating rod more. CONSTITUTION: This bush cutter 10 can rotate a cutting blade installed in one end part of the operating rod 11 by inserting a driving shaft 12 into the pipe- shaped operating rod 11, and rotating the driving shaft 12 by the motor attached to the other end part of the operating rod 11 through a clutch case 40. A clutch structure 30 installed between the shaft of the motor and the driving shaft 12 is housed in the clutch case 40. The clutch case 40 comprises an operating rod-attaching part 41 to which the other end part of the operating rod is attached, a flexible joint part 42 extended from the operating rod-attaching part to the motor side, and a motor-attaching part 43 extended from the flexible joint part to the motor side, and attached to the motor. The motor-attaching part 43 has a freely fitting hole part 43c for storing the other end part of the operating rod inserted from the operating rod-attaching part side so as to be movable in the shaft direction, and a contacting part 43d capable of contacting with the tip 11b of the operating rod at the bottom of the freely fitting hole part 43c.
Patent KR-20020026229-A (KR)
Inventor: CHO JUNG YEON
IPC: B62D63/04
Filed: 2002-03-05
Abstract: PURPOSE: A recycling method for a vehicle air filter is provided to remove the foam generated in the process of grinding and dispersion procedure by a defoamer and prevent the environmental pollution since the phenolic resin in the air filter paper is not soluble. CONSTITUTION: A recycling method for a vehicle air filter includes the steps of adding NaOH and defoamer to crushed air filter paper, and grinding and dispersing the mixture, wherein the NaOH has a concentration of 1-5% and a content of 8-15wt% with respect to the air filter paper, the grinding and the dispersion is carried out at a temperature of 20-40°C for 30-40 minutes, and the defoamer has a content of 0.05-0.2wt% with respect to the air filter paper.
Patent KR-20020079466-A (KR)
Title: Air conditioner
Inventor: AKETA YASUHIRO
IPC: F24F1/0073
Filed: 2002-04-04
Abstract: PURPOSE: To enhance rigidity of a body cabinet and to upgrade maintainability and an appearance in an air conditioner in which a front panel is projected forward. CONSTITUTION: A body cabinet 100 has a base, an upper surface panel 200 and a front surface panel 300. Only an air outlet 303 is formed on the panel 30. Thus, the refined appearance which has a little joints is finished. The fundamental constitution in which the front end side of the panel 200 is supported by a drip sink, is adopted. In addition, the front end side of the panel 300 is coupled to that of the panel 200 to each other.
Patent KR-20030080939-A (KR)
Title: A clip for newspaper
Inventor: KIM JUNG SHIN
IPC: B42F1/00
Filed: 2002-04-09
Abstract: PURPOSE: Provided is a clip for newspaper which minimizes rumples of newspaper when a user reads the newspaper, provides comfort to the user reading the news paper and is carried conveniently. CONSTITUTION: The clip for newspaper(1) is bonded to the folded part of newspaper and includes a main body(5) having a fixing hole to be forcibly fixed to the folded part of newspaper; a subsidiary rod(6) longitudinally disposed on the main body; and a cap(13). The cap is provided with a hanger(14) and a binding hole disposed beyond the hanger to be connected to a necklace. The hanger is attached to the cap in downward fixing direction. The clip for newspaper has a simple structure and small size.
Patent KR-20030081979-A (KR)
Title: Sense Amplifier Over Drive Control Circuit for decreasing Auto Refresh Current
Inventor: JUNG BONG HWA
IPC: G11C7/06
Filed: 2002-04-15
Abstract: PURPOSE: A sense amp over drive control circuit for auto refresh current reduction is provided to maintain core performance of a semiconductor memory device in a normal mode, and reduces a peak current and an average current in an auto refresh mode. CONSTITUTION: A sense AMP over drive control unit(500) outputs a signal to enable a sense AMP overdrive and a sense AMP drive by receiving an auto refresh enable signal and a sense AMP over drive enable signal and a sense AMP enable signal. A sense AMP overdrive(100) operates at a normal mode and does not operate at an auto refresh mode according to an output signal of the sense AMP overdrive control unit. A sense AMP drive(200) operates at the normal mode and the auto refresh mode according to the output signal of the sense AMP overdrive control unit. And a sense AMP(300) receives an external power supply voltage or a cell power supply voltage according to the driving of the sense AMP overdrive and the sense AMP drive.
Patent KR-20030082193-A (KR)
Title: vehicles's rescue at regulator motor
Inventor: LEE JUN U
IPC: H02K7/116
Filed: 2002-04-17
Abstract: PURPOSE: A structure of a regulator motor of a vehicle is provided to improve the durability by configuring a steal plate cover of the regulator motor and an off-set control screw in a body. CONSTITUTION: A regulator motor(300) for a window controls an elevating operation of a slide door window glass of a vehicle. An armature(100) is inserted into an inside of the regulator motor(300), generates electricity by an electromagnetic rotatory, and includes an armature gear. A motor housing(136) into which the armature(100) is inserted and forms an outer ring of the regulator motor(300). A worm wheel gear(134) meets the armature gear and is rotated by the rotation of the armature gear. A pinion gear(132) is provided within the worm wheel gear(134) and functions as an elevating device of the window glass by the rotation of the worm wheel gear(134). A steal plate cover(144) is provided on a side of the motor housing(136) so that the armature(100) rotates. An off-set control screw(118) is provided on a rear surface of the steal plate cover(144) at predetermined intervals away from the armature(100). A housing includes a steal plate and is operated by the off-set control screw(118).
Patent KR-20030084115-A (KR)
Title: Double tube with vacuum pump
Inventor: LEE DO HOON
IPC: B65D47/34
Filed: 2002-04-25
Abstract: PURPOSE: A double tube type container having a vacuum pump is provided to safely protect content in the container from air or sun-light, to keep original shape of the container and to discharge the content effectively. CONSTITUTION: The container(10) has the removable vacuum pump(20) formed on a main outlet of the container(10) to discharge constant amount of the content. The container(10) has a double structure of an outer housing(11) and an inner chamber(12). The outer housing(11) has the main outlet at upper portion and a shoulder(15) side integrated to the housing, and a sealing part(16) at lower portion thereof. The housing(11) has also an air hole(17). Within the housing(11), the inner chamber(12) is attached to inner side of the shoulder(15) and has a bottom end to be adhered to the sealing part(16) by fusing under heat.
Patent KR-20030084182-A (KR)
Title: pack method of toasted laver and pack device
Inventor: PARK CHUNG KWANG
IPC: A23L17/60
Filed: 2002-04-25
Abstract: PURPOSE: Provided is a method and a device for packing toasted laver of which surface is coated with oil and salt. Predetermined sheets of toasted laver are cut then contained in a packing material with a zipper. CONSTITUTION: A method for packing toasted laver is characterized by the steps of; positioning predetermined sheets of toasted laver on a lower frame and cutting them with a cutter operating along the lower frame of upwardness and downwardness; covering the lower frame on which the cut toasted laver is positioned with the main body of a container and turning them over to allow the container to contain the toasted laver; placing a sealing sheet on the main body of the container and sealing them together by heating; and inserting the main body of the container into packing material with a zipper then sealing them.
Patent KR-20030087335-A (KR)
Title: Flat Panel Display with Improved emitting efficiency
Inventor: KIM BYEONG HUI
IPC: H05B33/10
Filed: 2002-05-08
Abstract: PURPOSE: A flat display device and a method for manufacturing the same are provided to achieve improved luminous efficiency by forming a curvature at the organic electroluminescence layer in such a manner that the light is reflected in a forward direction. CONSTITUTION: A flat display device comprises an insulation substrate(200) having a switching element; a first insulation film formed on the insulation substrate, and which has a convex-concave corresponding to a pixel aperture; a pixel electrode(270) formed on the first insulation film and electrically connected to the switching element; a second insulation film having the pixel aperture for exposing a certain part of the pixel electrode; and an organic electroluminescence layer(290) formed in the pixel aperture and which has a curvature.
Patent KR-20040003075-A (KR)
Title: A composition for treating a dermatitis rash and a method of preparing the same
Inventor: SHIN GWANG HO
IPC: A61K33/00
Filed: 2002-05-10
Abstract: PURPOSE: Provided is a diaper rash treatment composition which effectively prevents and treats various kinds of skin rashes without making noxious skin stimulation and adverse side effects. CONSTITUTION: A diaper rash treatment composition comprises Astragalus membranaceus, bamboo salt(salt roasted in bamboo), and burnt alum. A method of preparing the diaper rash treatment composition comprises the steps of: making an extract of Astragalus membranaceus using an organic solvent; dissolving bamboo salt and burnt alum in water to make a solution; and adding the extract to the solution, and mixing them.
Patent KR-20030090172-A (KR)
Title: Method and System for providing advertisements based on place to mobile terminal
Inventor: YOON SEOK HYEON
IPC: H04W4/00
Filed: 2002-05-21
Abstract: PURPOSE: A method and system for providing a multimedia advertisement corresponding to the location of a mobile terminal is provided to offer a multimedia advertisement corresponding to the location of a mobile terminal and to discount the call charge according to the watching of the multimedia advertisement. CONSTITUTION: A system for providing a multimedia advertisement corresponding to the location of a mobile terminal is comprised of mobile terminals(100,150), BTSs(Base Transceiver Stations)(105,155), BSCs(Base Station Controllers)(110,160), MSCs(Mobile Switching Centers)(115,165), location-based advertisement service systems(130,180), MMSCs(Multimedia Messaging Service Centers)(125,175), and long message service centers(120,170). The location-based advertisement service systems(130,180) provide multimedia advertisements corresponding to the locations of mobile terminals, and present a charge discount service on the basis of advertisement watching. The MMSCs(125,175) transmit and receive all types of multimedia messages, such as images, E-mail, etc., breaking from the data centered on voice message and short messages.
Patent KR-20020043207-A (KR)
Inventor: CHOI YEONG CHAN
IPC: G07F19/00
Filed: 2002-05-22
Abstract: PURPOSE: A check deposit and withdrawal device of an automatic teller machine and a service method thereof are provided to enable the check as marketable securities to be circulated like cash at real time. CONSTITUTION: The check deposit and withdrawal device of an automatic teller machine is comprised of a door part(100) through which a first check to be deposited is input or a second check to be withdrawn is output; an image recognizing part(200) having a first and a second image recognizers scanning the top and bottom surfaces of the first check input through the door part; a magnetic ink character recognizing part(500) for determining the truth of the first check; a temporary check storage part(300) for temporarily storing checks when the deposit of the first check or the withdrawal of the second check is cancelled; a deposited check loading part(900); and a withdrawal check loading part(800).
Patent KR-20030094434-A (KR)
Title: jig for robot setting up of semiconductor device manufacturing equipment
Inventor: KIM JEONG JU
IPC: H01L21/68
Filed: 2002-06-04
Abstract: PURPOSE: A robot setting jig of a semiconductor device manufacturing equipment is provided to be capable of easily improving the exactness of robot driving and restraining the damage of a wafer. CONSTITUTION: A robot setting jig of a semiconductor device manufacturing equipment is provided with a robot(10) having the same shape as a cassette, controlled by a controller, a blade(14) installed at the robot through a link arm(12) and a plurality of measurement holes formed at each measurement position for being inserted with the blade. Preferably, the robot setting jig further includes a support block(22) formed with the measurement hole. Preferably, the robot setting jig further includes a support shaft(24) installed at the upper portion of each measurement hole for limiting the insertion depth of the blade.
Patent KR-20020090926-A (KR)
Inventor: JUNG BYEONG TAE
IPC: F03G7/00
Filed: 2002-06-11
Abstract: PURPOSE: A non-inertial Coriolis force generating method in a closed system and an internal propelling method of the closed system thereby are provided to move the closed system by generating non-inertial Coriolis force in the closed system without applying external force. CONSTITUTION: Masses(M1,M2) are placed at both sides of a shaft, and Coriolis force is generated in the center of the mass by applying torque to the rotational center of the other mass in rotating masses at constant velocity with changing the radius. The mass is stopped momentarily by Coriolis force to be the instant center of mass, and Coriolis force is generated in rotating the other mass. Opposite Coriolis force is generated with reaction after generating lateral force, and moving force is generated with vector addition of Coriolis force and opposite Coriolis force to move the closed system. The object is moved and stopped by changing the direction momentarily with generating non-inertial Coriolis force in the closed system.
Patent KR-20030095692-A (KR)
Title: Authentication apparatus and method for network system
Inventor: CHUN GYEONG JUN
IPC: H04N21/418
Filed: 2002-06-14
Abstract: PURPOSE: An authentication apparatus and an authentication method in a network system are provided to obtain the high efficiency at a low cost by authenticating peculiar identifications(ID) through a network by using ESNs. CONSTITUTION: A pluralit of set-top boxes transmit peculiar electronic serial numbers(ESN) to an authentication server(502). The authentication server discriminates whether the set-top boxes are authenticated(504). The authentication server reports the result of the authentication to the set-top boxes(506). The authentication server transmits a switching control signal to a network switch(508). The network switch controls the set-top boxes not to receive a service or to receive the service according to the provided switching control signal(510).