baber/WOPTO huggingface dataset:
Patent KR-20090033935-A (KR)
Title: Method for dispensing chemical
Inventor: LEE KWANG RYUL
IPC: H01L21/302
Filed: 2007-10-02
Abstract: A spray method of chemical can change the moving view point of the spray nozzle and shorten the process time of the semiconductor. The wafer is accepted within the container(100). The first spray nozzle(200) is moved to the wafer within the container. The first chemical is emitted to the wafer by using the first spray nozzle. The first spray nozzle is moved to the outside of the container. The first spray nozzle breaks away from the wafer within the container. The second spray nozzle(300) is moved to the wafer within the container. The second chemical is emitted to wafer by using the second spray nozzle.
Patent KR-20090034232-A (KR)
Title: Safety step device for railway vehicle
Inventor: PARK SUNG HYUK
IPC: B61D23/00
Filed: 2007-10-02
Abstract: A safety step device is provided to connect space between a railway vehicle and a platform while the railway vehicle stops at the platform by being installed at the railway vehicle so that the old safely get on and off in the railway vehicle. A step member(110) is equipped at the lower part of a door(16) of a body(10) of a railway vehicle(1) and moves forward and backward and fills gap between the body of the railway vehicle and the end part of a platform. A driving unit drives the step member toward the platform end part forward and backward according to the control signal of a controller. When the step member move towards the platform end part and comes close to the platform end part, the controller stops the operation of the driving unit.
Patent KR-20080031651-A (KR)
Title: Silicon wafer having good intrinsic getterability and method for its production
Inventor: MUELLER TIMO
IPC: H01L21/208
Filed: 2007-10-04
Abstract: A silicon wafer having good intrinsic getter ability and a manufacturing method thereof are provided to obtain the silicon wafer capable of ensuring sufficient BMD formation and intrinsic getter ability by regulating invasion type oxygen concentration appropriately. Silicon wafer, in whose entire volume crystal lattice blank characters represent the prevailing kind of point defect, whereby the silicon wafer exhibits a range with a width of at least 80% of the radius of the silicon wafer, rotationally symmetric related to their axis, whereby this range of agglomerates of crystal lattice blank characters with a value of at least 30 nm in a density of maximally 6x10^3 /cm^3 and agglomerates of crystal lattice blank characters with a value from 10 Nm to 30 Nm in a density of 1x10^5 /cm^3 to 3x10^7 /cm^3 exhibits, whereby the silicon wafer of OSF germs in a density from 0 /cm^2 to 10 /cm^2 and in their inside a middle BMD density of 5x10^8 /cm^3 to 5x10^9 /cm^3 exhibits, whereby the BMD density in radial direction varies over the entire radius of the silicon wafer maximally around a factor 10, and whereby the silicon wafer exhibits a BMD free layer at least at the front side of the silicon wafer, which is characterized by the fact that the first BMD on the entire front side of the silicon wafer in a depth is found by at least 5 micro meter and the first BMD is found average in a depth by at least 8 micro meter.
Patent KR-20090034611-A (KR)
Title: Lpg charging apparatus and arranging method thereof
Inventor: YOEN KYOO SOOK
IPC: B60S5/02
Filed: 2007-10-04
Abstract: An LPG charging apparatus and an installation method thereof are provided to arrange an LPG charging and storage units efficiently with satisfying a safety and business management statute. An LPG charging apparatus comprises: an LPG storage tank(1) which is provided with LPG from an LPG tank; and one or more battery chargers(3) installed at a canopy(2) in order to charge gas to a vehicle which is provided with LPG from the storage tank and uses LPG as a fuel. In the storage tank, an inlet(4) for charging the storage tank with the LPG gas from the LPG tank and an outlet(6) supplying stored liquid LPG to the battery charger through a submerged motor pump(5) is formed. In the outlet, a liquid LPG pipe(7) for supplying liquid LPG to the battery charger is installed. A vapor LPG pipe(8) is connected to the inlet to collect vapor LPG, generated charging LPG to the vehicle, to the storage tank.
Patent KR-20090035914-A (KR)
Title: Method for forming copper line
Inventor: BAEK IN CHEOL
IPC: H01L21/28
Filed: 2007-10-08
Abstract: A method for forming the copper wiring is provided to increase the semiconductor produce yield by using the nitride film generated in the surface of semiconductor substrate. The via hole is formed on the insulating layer(IMD)(300) in the semiconductor substrate. The via hole is filled with the novolak resin which is a photosensitive material. The nitride film is formed on the semiconductor substrate by performing the nitrogen(N) ion implantation process. The trench for the copper wiring formation is formed at the upper part of the via hole. The novolak resin is removed from the trench. The copper wiring film(310) is formed in the trench and via hole by the EMP method. The copper wiring is formed by depositing copper in the trench and via hole. The nitride film is removed by performing CMP on the surface of semiconductor substrate.
Patent KR-20090036660-A (KR)
Title: Method of high frequency plant regeneration from zygotic embryo-derived embryogenic cell suspension cultures of brasenia schreberi
Inventor: KIM SUK WEON
IPC: C12N5/02
Filed: 2007-10-10
Abstract: A method for regenerating high frequency plant from zygotic embryo-derived embryogenic cell suspension cultures of Brasenia schreberi is provided to generate somatic embryo and high frequency plant from embryogenic callus of Brasenia schreberi through suspension culture. A method for regenerating high frequency plant from zygotic embryo-derived embryogenic cell suspension cultures of Brasenia schreberi comprises the steps of: (i) germinating Brasenia schreberi seeds in a 1/2 MS basic medium; (ii) inducing the zygotic embryo by cutting the germinated seeds and sprouting it in the 1/2 MS basic medium; (iii) forming a callus by cultivating the induced zygotic embryo in the 2,4-D-added 1/2 MS medium; (iv) multiplying the callus in the 2,4-D-added 1/2 MS medium; (v) suspension culturing the multiplied callus in the 2,4-D-added 1/2 MS medium; (vi) differentiating high frequency plants by subculturing the cell mass formed in the suspension cultivation step in the 1/2 MS medium added with activated charcoal and zeatin; and (vii) inducing the formation of roots by subculturing plants specialized with leaf in the 1/2 MS medium added with IAA, NAA.
Patent KR-20090037001-A (KR)
Title: Method and apparatus of testing operation of battery in power supply device
Inventor: CHUNG JIN YOUNG
IPC: G01R31/36
Filed: 2007-10-11
Abstract: A method and apparatus of a testing operation of a battery in a power supply device is provided to allow a work to test a battery by performing automatically testing. A power supply(130) rectifies AC current and supplies DC current to a system(110) and a system control(120). The system controller controls a test of an auxiliary power within the power supply device, and it stop the test and return a normal mode when it detects abnormal state in testing the auxiliary power.
Patent KR-20090038201-A (KR)
Title: 토너 차단필름 자동제거장치 및 그 방법
Inventor: KWEON SUNG JIN
IPC: G03G21/18
Filed: 2007-10-15
Abstract: 본 발명은 일반적으로 사용되고 있는 드럼.토너 일체형 카트리지 혹은 토너 카트리지가 전자사진기기에 장착되면, 장착된 카트리지에 대하여 전자사진기기가 새 제품임을 판독하고, 새 제품인 경우 토너의 누출을 방지하기 위하여 사전 부착된 차단필름이 자동으로 제거되도록 한 토너 차단필름 자동제거장치 및 그 방법에 관한 것이다. 
     본 발명을 사용하게 되면, 사용자가 새 제품의 카트리지를 사용하기 위하여 사용자가 사전 부착된 차단필름을 제거하게 될 때, 토너 누출로 인해 손이나 의복, 바닥 등이 오염되는 것을 방지할 수 있고, 나아가 사용자의 착오에 의해 차단필름이 미제거된 상태로 카트리지를 장착시 토너의 공급차단으로 인한 블랭크 복사가 방지될 수 있도록 한 것이다. 
     
     카트리지, 토너, 차단, 필름, 자동, 제거, 오염, 자동, 제거
Patent KR-20090041518-A (KR)
Title: Personalized network management system and method
Inventor: KIM KI EUNG
IPC: H04L12/24
Filed: 2007-10-24
Abstract: An individual customized network management system and a method for providing the network application management effectiveness are provided to offer the private customized function manager about the network element and the downtime. An individual customized network management system(100) includes the policy manager(110), data collecting part(120), data processing block(130), facility management part(140), private tube heart ratio administration unit(150), the private view [personal view] administration unit(160), private SMS administration unit(170), controller(180) and database part(190). The tube heart ratio which the private tube heart ratio administration unit tries to manage with private is registered. The private tube heart ratio administration unit manages the tube heart ratio about the tube heart ratio with each private. The private view administration unit provides the management screen including private topology on the information of the tube heart ratio.
Patent KR-20090041571-A (KR)
Title: Rubber composition of tire having polybutene
Inventor: CHO CHUN TAEK
IPC: C08L19/00
Filed: 2007-10-24
Abstract: A tire rubber composition containing polybutene is provided to ensure excellent adhesion property, braking characteristic and endurance property in comparision with the rubber composition which does not contain polybutene. A tire rubber composition containing polybutene includes a rubber composition containing polybutene to tire. The rubber composition containing polybutene is used for one or greater selected from tire tread, the sidewall, carcass and inner liner. The rubber composition containing polybutene contains polybutene of 5~40 parts by weight based on the crude rubber 100.0 parts by weight. The number average molecular weight of polybutene is 300~10,000.
Patent KR-20090042583-A (KR)
Inventor: BAE KYUNG JIN
IPC: H01L21/66
Filed: 2007-10-26
Abstract: A semiconductor device is provided to check a lower conductive pattern related bias and a defect of a signal without contacting a probe pin with a lower conductive pattern. A semiconductor device comprises lower conductive patterns(321), upper conductive patterns(322) and upper dummy conductive patterns(372). The lower conductive patterns are arranged in the same level. The upper conductive patterns arranged on the lower conductive patterns. The upper conductive pattern is arranged between the upper conductive patterns. The upper conductive patterns are contacted with the lower conductive patterns selected through a contact. A selected lower conductive pattern related bias and a defect of a signal are checked through the upper dummy conductive pattern.
Patent KR-20090043350-A (KR)
Inventor: KANG DAE IN
IPC: H01L21/768
Filed: 2007-10-29
Abstract: 본 발명은 반도체 소자의 비트라인 형성 방법에 관한 것으로, 더욱 상세하게는 비트라인 콘택 내부의 베리어 메탈층을 텅스텐 나이트라이드/티타늄(WN/Ti)의 적층 구조로 형성한 다음, 상기 구조 전면에 급속 열처리 (rapid thermal annealing) 공정을 수행하고, 비트라인 콘택 내부에 텅스텐층을 매립함으로써, 비트라인 콘택 저항을 감소시킬 수 있는 비트라인 형성 방법에 관한 것이다.
Patent KR-20090043689-A (KR)
Title: 이물질 제거가 가능한 사이펀 통로를 갖는 수문을 이용하여수질을 정화하는 방법
Inventor: HAN SANG KWAN
IPC: C02F1/00
Filed: 2007-10-30
Abstract: 본 발명은 수문에 사이펀 통로를 구성하여 수로를 폐쇄한 상태에서도 사이펀 통로를 통해 저수공간의 하층수를 배출할 수 있어 저수공간 및 하천의 수질을 정화함과 동시에 사이펀 통로가 회전되도록 하여 사이펀 통로에 끼인 이물질을 제거할 수 있도록 한 이물질 제거가 가능한 사이펀 통로를 갖는 수문을 이용하여 수질을 정화하는 방법에 관한 것이다. 
     이러한 본 발명은 수문의 저수측면에는 지수부재를 부착하고, 단면상 "ㄷ"자 형상의 사이펀 판을 수문의 저수측면 하부 일측에서부터 상부 위쪽까지 지수부재와 밀착될 수 있도록 위치시킨 상태에서 사이펀 판의 하단부와 수문의 접촉부위를 힌지를 통해 회전가능하게 연결하여 사이펀 판의 안쪽면과 수문 사이의 공간이 사이펀 통로를 이루도록 구성함으로써 사이펀 판을 통해 형성된 사이펀 통로를 통해 수문의 폐쇄시에도 저수공간의 하층수를 배출함에 따라 저수공간 및 하천수의 수질을 정화함과 동시에 사이펀 통로에 이물질이 쌓이면 사이펀 판을 힌지를 중심으로 회전시켜 이물질을 제거토록 하는 것이다. 
     
     수문, 사이펀, 수질 정화
Patent KR-20090044603-A (KR)
Inventor: I JEONG GI
IPC: B65D47/34
Filed: 2007-11-01
Abstract: 본 발명은 액상의 내용물을 거품의 형태로 토출하는 거품발생 펌프로서, 토출구가 형성되어 있는 버튼(button), 펌프의 외관을 구성하는 하우징, 하우징을 소정의 용기에 장착하는 클로우져, 샤프트의 하부 내면에 장착된 상태로 상하 운동을 하는 스템, 내용물이 통과하는 중공 통로로 버튼의 하부에 장착되어 있는 샤프트, 내용물과 공기를 혼합하여 거품을 생성하는 거품망, 하우징의 에어공간과 용액공간을 분리시키는 하우징 캡, 다단식 구조로 이루어져 있는 에어 피스톤, 스템의 외면에 장착되어 있는 용액 피스톤, 피스톤 에어홀을 개폐하는 에어 밸브, 샤프트의 하단부와 용액 피스톤 사이에 위치하는 제 1 압축스프링, 샤프트의 측면 돌출부와 하우징 캡의 지지홈 사이에 위치하는 제 2 압축스프링, 및 펌핑시 하우징 하단 유입구를 개폐하는 개폐부재를 포함하는 구조로 이루어져 있는 거품발생 펌프를 제공한다.
Patent KR-20090047146-A (KR)
Title: 임프린트용 스탬프 및 이의 제조방법
Inventor: CHOI JUNG SU
IPC: H01L21/027
Filed: 2007-11-07
Abstract: 본 발명은 임프린트용 스탬프 및 이의 제조방법에 관한 것으로, 본 발명에 따른 임프린트용 스탬프는 광 투과성 재료로 마련되며, 음각부와 양각부로 이루어지는 미세패턴이 형성되는 기판;및 광 차단성 재료로, 상기 양각부의 돌출면에 마련되며, 광을 차단하는 차광막;을 구비함으로써, 패턴이 형성될 기판에 도포된 감광막의 노광부와, 비노광부가 명확히 구분되도록 하여, 원하는 고품질의 패턴형상을 얻을 수 있으며, 이에 따라, 불량생산을 감소시켜, 생산비용을 절감할 수 있는 효과가 있다.
Patent KR-20080052382-A (KR)
Title: Apparatus and method of dialogue service for providing information
Inventor: OH HYO JUNG
IPC: H04N21/45
Filed: 2007-11-21
Abstract: An apparatus and a method for providing interactive information are provided to analyze the request of a user on the basis of an interactive input received from the user and offer information corresponding to the analyzed result. A dialogue sentence analyzing unit(20) analyzes an input sentence received from a user. A dialogue management unit(30) analyzes the request of the user through the analyzed result of the dialogue sentence analyzing unit. When a real-time information update is requested from the dialogue management unit, an automatic knowledge constructing unit(70) extracts daily life information updated on a web in real time and stores the extracted daily life information in a daily information database. A response generating unit(40) generates a response for the request of the user analyzed in the dialogue management unit and provides the generated response to the user. When it is impossible to respond to the request of the user or an error exists in the response for the request of the user, an exception processing unit(80) recovers a system to allow the user to cancel the request of the user.
Patent KR-20090052973-A (KR)
Inventor: HUR CHEOL GOO
IPC: C07K14/47
Filed: 2007-11-22
Abstract: 본 발명은 마우스의 위 조직에서 특이적으로 발현되는 PMM8SX08910 단백질, 상기 단백질을 코딩하는 유전자, 상기 유전자를 포함하는 재조합 벡터, 상기 재조합 벡터로 형질전환된 형질전환체, 상기 단백질에 대한 항체, 상기 유전자를 포함하는 위 관련 질병을 진단하기 위한 마커, 상기 유전자 또는 상기 항체를 포함하는 위 관련 질병을 진단하기 위한 마이크로어레이 및 상기 유전자를 이용하여 포유류의 위 관련 질병을 진단하는 방법에 관한 것이다. 
     
     위 특이적 유전자, PMM8SX08910 단백질, 마커, 마이크로어레이
Patent KR-20090053441-A (KR)
Inventor: KIM HAK BYUNG
IPC: A61B5/00
Filed: 2007-11-23
Abstract: 본 발명은 압전센서를 이용한 비접촉 생체신호 측정장치에 관련되며, 이때 압전센서를 이용한 비접촉 생체신호 측정장치는 환자의 피부에 직접적으로 접촉되지 않은 상태로 생체신호 즉, 심장박동수, 호흡수를 측정하고, 그 생체신호를 이용하여 병원이나 실버타운에서 생활하는 대다수의 환자 혹은 노약자 건강을 일률적으로 체크 관리하기 위해 압전센서(10), 마감패드(20)(20'), 표층패드(30), 증폭기(40), 대역통과필터(50), 메인컴퓨터(60) 등을 주요 구성으로 이루어진다. 
     이에 따라, 본 발명은 옷을 입은 상태로 피부 비접촉방식으로 생체신호를 측정하므로 개인프라이버시가 존중되고, 특히 병원, 요양시설, 독거노인가정 등에 비치된 침대나 소파에 간편하게 적용되어 환자 혹은 노약자의 생체신호를 일괄적으로 자동체크 관리하므로 불필요한 인력낭비 및 비용이 절감됨은 물론 응급상황에 보다 신속하게 대응할 수 있도록 관리체계가 확보되는 효과가 있다. 
       
     압전센서, 패드, 증폭기, 심장박동수, 호흡수
Patent KR-20090053510-A (KR)
Inventor: WOO SANG KYU
IPC: G02F2/00
Filed: 2007-11-23
Abstract: 본 발명은 전계흡수 광 변조기, 전계흡수 송수신기 및 이를 이용한 원격 안테나 장치에 관한 것으로서, 구체적으로 외부 바이어스 없이도 광 변조기로서의 특성은 유지하면서 광 검출기로서의 특성은 향상시킬 수 있는 전계흡수 광 변조기, 전계흡수 송수신기 및 이를 이용한 원격 안테나 장치에 관한 것이다. 
     본 발명의 전계흡수 광 변조기는 입력 광신호의 파장과 광흡수층의 가장 자리 파장의 차이가 실질적으로 36nm 보다 크고 50nm 보다 작다.  
       
     전계흡수, 송수신기, 피코셀, EAM, 광 변조기, 광 검출기, RAU
Patent KR-20090056503-A (KR)
Inventor: SHIN DONG CHEON
IPC: G02F1/1339
Filed: 2007-11-30
Abstract: A composition for forming a pattern spacer and a liquid crystal display device having the pattern spacer made therefrom are provided to form a spacer having excellent resistance dimension stability for maintaining a cell gap. A composition for forming a pattern spacer comprises a binder resin containing a compound represented by chemical formula 1; a photopolymerization monomer; a photopolymerization initiator; and solvent. In chemical formula 1, m+n=1, O<=m<=1, O<=n<=1, R1 and R3 are any one selected from the group consisting of compounds 1-4 represented by chemical formula 2. The photopolymerization monomer is at least one selected from the group consisting of polyethyleneglycol monoacrylate, polypropylene glycol monoacrylate, trimethylolpropane triacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, phenoxyethylacrylate, dipentaerythritol pentamethaacrylate and dipentaerythritol hexamethaacrylate.
Patent KR-20090057649-A (KR)
Title: Digital image processing apparatus deleting an image automatically and the method of comtrolling the same
Inventor: CHOI SOO BIN
IPC: H04N5/232
Filed: 2007-12-03
Abstract: A digital image processing device for automatically deleting images and a control method thereof are provided to prevent a user to miss a desired scene by automatically deleting the images stored in a storage unit and securing storage space in the storage unit. An imaging unit captures an image by input of a shutter release button. A storage unit stores the captured images. An algorithm compares a size of the captured image with the size available in the storage unit. A controller(210) performs the algorithm for assigning points to the captured image and deleting the stored image based on the points. A user input unit receives a command from a user. A display unit(170) displays the captured image.
Patent KR-20090057831-A (KR)
Title: Multi-layer scintillator detector and positron emission tomography device therewith
Inventor: ITO MIKIKO
IPC: A61B5/05
Filed: 2007-12-03
Abstract: A multi-layer scintillation detector and a positron emission tomography device by using the same are provided to improve spatial resolution without sensitivity degradation by sensing a scintillation signal including DOI(Depth Of Interaction) between scintillation crystals. A scintillation crystal layer group(100) comprises crystalline layers(110,120,130,140), which are laminated as stepped. A first scintillation layer comprises a plurality of scintillation crystals(111) arranged as a NxN array, and a second scintillation layer comprises a plurality of scintillation crystals(121) arranged as a NxN array. A third scintillation layer comprises a plurality of scintillation crystals(131) arranged as (N-1) x (N-1) array. The fourth scintillation layer comprises a plurality of scintillation crystals(141) arranged as (N-1) x (N-2) array form.
Patent KR-20090062855-A (KR)
Title: Roof spoiler for vehicle
Inventor: KIM MIN HO
IPC: B62D37/02
Filed: 2007-12-13
Abstract: A roof spoiler for vehicles is provided to open or close an inlet formed therein according to the operation of an air conditioner, thereby securing the inflow amount of the air. A roof spoiler for vehicles comprises: a spoiler(10) with an inlet; a moving plate(20) arranged in the spoiler to open or close the inlet; and an actuating unit(30) to move the moving plate. The moving plate has a sucking hole connected to the inlet. The moving plate is moved along a rail arranged on the spoiler. The actuating unit consists of: a motor(32); a pinion(34) combined with the motor; and a rack(36) engaged with the pinion while fixed to the moving plate.
Patent KR-20090063770-A (KR)
Title: Switch for a roof mirror
Inventor: SHIN SUN YONG
IPC: H01H21/34
Filed: 2007-12-14
Abstract: A switch for a loop mirror is provided to prevent malfunction due to contact failure by including a limit switch contact controller with a limit switch in a cover. A loop mirror includes a base and an upper cover rotatably assembled in the base by a hinge shaft. A switch of the loop mirror includes a cam member(121) and a limit switch(130). The cam member is equipped in a tip of a hinge arm extended from the hinge shaft. The limit switch is fixed in the upper cover. The limit switch has a contact(131) vertically contacted with the rotation axis of the cam member.
Patent KR-20090063882-A (KR)
Title: Method for treating exhaust gas in exhaust system
Inventor: LEE HYEON JIK
IPC: F01N9/00
Filed: 2007-12-14
Abstract: An exhaust gas treatment method of an exhaust system is provided to diagnose whether an exhaust system is in sulfur poisoning or not without additional cost-up. An exhaust gas treatment method of an exhaust system comprises a step(S1440) which performs the recycling mode in case of determining sulfur poisoning; a step(S1450) which determines whether desulfurization is completed or not after comparing a oxygen sensor reverse time with 'a catalyst OSC(oxygen storage capacity); a step(S1460) which stops the recycling mode when desulfurization was completed; a step(S1470) which determines whether the exhaust system was sulfur-poisoned or not after comparing the obtained catalyst OSC and the oxygen sensor reverse time with the value obtained in the condition doubting about sulfur poisoning; and a step(S1480) which stores the catalyst OSC and the oxygen sensor reverse time measured after the recycling mode termination in the car computer.
Patent KR-20090066901-A (KR)
Title: Accoustic noise reducing apparatus for disk drive
Inventor: CHA IK JOO
IPC: G11B33/08
Filed: 2007-12-20
Abstract: A noise reducing apparatus for a disk drive is provided to offset noise and remove the noise by causing resonance between specific frequency of the noise generated in the rotation of disc and the air of an air layer and a sound-absorbing hole. Inside a noise reducing apparatus for a disk drive, a tray(40) in which a disc is mounted is equipped. In the tray, a plurality of sound-absorbing holes(46) are formed to cause resonance with specific frequency of the noise generated in the rotation of disc. In the tray, a disk mounting surface(42) in which a disc is mounted is recessed and the sound-absorbing holes are regularly arranged on the disk mounting surface.
Patent KR-20090067654-A (KR)
Title: Rtro-reflecting unit and retro-reflector therewith
Inventor: KIM BONG JU
IPC: E01F9/619
Filed: 2007-12-21
Abstract: A retro-reflective device and a retro-reflector including the same are provided to make various kinds of retro-reflectors with different reflection directions by changing the reflection direction in a design process. A retro-reflective device is comprised of a reflective corner(10) and a pair of vertical reflection sides(11,12). The reflective corner is comprised of a pair of corner reflection sides which are contacted with a face angle of a right angle and is arranged in parallel. The pair of vertical reflection sides are formed in a vertical direction of a reflection corner edge with an interval and have an upper part with different height. The height of the upper part of the vertical reflection sides has the larger difference than the interval between the vertical reflection sides. The retro-reflector is comprised of the retro-reflective device densely arranged in a regular pattern.
Patent KR-20090070063-A (KR)
Title: Improvement unity erase mark pen
Inventor: KANG TAE HYUK
IPC: B43K29/02
Filed: 2007-12-26
Abstract: A pen in which a marker and an eraser are integrated is provided to prevent loss of a cap which covers an end part of the pen, and to offer excellent convenience by using the marker and the eraser at the same time. A writing instrument(10) includes the followings: an end part(12) and a base part(14); a casing(16) extended to a longitudinal axis and adjacent to the base part with a slot(28); an eraser(26) arranged on the base part of the casing; a valve having a valve door and combined on the casing; a movable end part formed between a keeping position and a writing position extended from the valve; and an actuator(30) moving the end part, and combined on the end part.
Patent KR-20090070350-A (KR)
Title: Piston having top land portion made of different material from the other part of the piston
Inventor: KANG WOO JIN
IPC: F02F3/04
Filed: 2007-12-27
Abstract: A piston having bi-material in a top land unit is provided to increase engine output and compression ratio through reduction of the dead volume because a band unit whereof coefficient of thermal expansion is greater than material of a piston body is included. A piston having bi-material in a top land unit is inserted into a cylinder of an engine. One or more land units are formed on the top of the piston. In one or more land units, a band unit(100) is arranged in the top-land unit positioned on the top thereof. The band unit is made of the material whereof coefficient of thermal expansion is greater than the material of the piston body.