baber/WOPTO huggingface dataset:
Patent KR-20080002637-A (KR)
Title: Battery
Inventor: KATO YOSHIKAZU
IPC: H01M6/16
Filed: 2007-06-20
Abstract: A battery is provided to improve the safety in case of the breakage of a battery without the deterioration of cycle characteristics by inhibiting ignition when a battery is broken. A battery comprises a cathode; an anode; and an electrolyte, wherein the anode has an anode active material layer which comprises a resin containing sulfur as a binder; optionally a carbon material; optionally at least one selected from the group consisting of silicon(Si), tin(Sn), their alloys and their compounds; and optionally at least one selected from the group consisting of polyvinylidene fluoride and polyimide. Preferably the resin containing sulfur contains a sulfone bond (-SO2-) or a thioether bond (-S-). Preferably the resin containing sulfur is represented by the formula 1.
Patent KR-20090002231-A (KR)
Inventor: KIM DEOK SAN
IPC: G06Q40/06
Filed: 2007-06-23
Abstract: 본 발명은 특허권 펀드에 관한 것으로 특허를 보유하고 있지만 실시하기에 어려움을 가지고 있는 회사를 위하여서 운용된다. 뿐만 아니라 가능성 있는 특허권에 투자함으로써 고수익을 추구하고자 하는 투자자들을 위해 운용된다. 
       
     특허, 특허권 펀드, 특허펀드
Patent KR-20080113660-A (KR)
Title: 도장 필름과 그 제조 방법
Inventor: CHUN WOO SANG
IPC: C09J7/02
Filed: 2007-06-25
Abstract: 본 발명은 플렉시블한 필름재의 한 면에 도장층과 접착제 또는 도장액과 접착제가 혼합된 혼합액을 도포하여 차량의 손상된 부위에 쉽게 접착하여 도장면을 복원할 수 있도록 하는 도장 필름 및 그 제조 방법을 제공한다. 
     이를 위하여, 본 발명은 유연성을 갖는 투명한 합성수지재 필름의 한 면에 페인트와 액상의 접착제가 혼합된 도장층이 분사에 의하여 형성되는 도장 필름이 구성되며,  
     또한, 이를 제조하기 위하여 유연성을 갖는 투명의 합성수지재로 된 필름의 정전기를 제거하는 과정; 도장액과 접착액을 혼합하여 혼합액을 생성하는 과정; 정전기가 제거된 필름의 한 면에 혼합액을 분사하여 도장층을 형성하는 과정; 도장층이 형성된 필름을 열경화시키는 과정; 필름의 한 면의 도장층 상부와 필름의 다른 면의 상부에 보호필름을 부가하는 과정;으로 수행된다.
Patent KR-20080023100-A (KR)
Title: Motor and disk driving device having the same
Inventor: KODAMA MITSUO
IPC: G11B19/20
Filed: 2007-07-06
Abstract: A motor and a disk driving device having the same are provided to enhance indentation stiffness of an inner body by contacting one section of the inner body on an axial inner surface of a rotor hub. A motor includes a sleeve(3), a sleeve supporter(2), a rotor hub(6), and an inner body(8). The sleeve supports a rotor shaft(5) to rotate free. A flange unit(3B) is formed at an outer periphery of the sleeve. The sleeve supports the sleeve. The rotor hub has a ring type wall unit(6A) with the same axis as the rotor shaft. The inner body is fixed inside the ring type wall unit of the rotor hub to wrap the sleeve and the sleeve supporter. One section of the inner body is in contact with an axial inner surface(6Bf) of the rotor hub. A ring type block unit(8A) is inserted between the flange unit of the sleeve and one section of the sleeve supporter and is formed at an inner periphery of the inner body. A first thrust bearing unit(TB1) is formed to interpose a lubricant between the ring type block unit and the flange unit. A second thrust bearing unit(TB2) is formed to interpose a lubricant between the ring type block unit and the one section of the sleeve supporter.
Patent KR-20090005562-A (KR)
Title: Ocarina of the board
Inventor: LEE IL YONG
IPC: G10D7/00
Filed: 2007-07-09
Abstract: A plate type ocarina is provided to allow anyone to make an ocarina by laminating boards to prepare a hollow body and perforating finger holes on the body. A plate type ocarina(1) comprises a base plate(10) which has a sound hole, a plurality of finger holes, a mouth member(12), and a blow groove(13) connected to the sound hole; a lower plate(20) which includes a mouth part(21) formed to correspond to the blowing member and a resonance hole, and surrounds the sound hole and the finger holes of the base plate; an intermediate plate(30) which has a resonance hole and is fixed on the top of the lower plate; and an upper plate(40) which has a plurality of finger holes(41) connected with a resonance space and is fixed on the top of the intermediate plate.
Patent KR-20090011168-A (KR)
Title: Wafer protection film attachment device, and attachment method using the same
Inventor: KIM HWAN BIN
IPC: H01L21/304
Filed: 2007-07-25
Abstract: A device for attaching protective film and an attaching method thereof are provided to remove minute static electricity and to prevent generation of static electricity by spaying an ion on an outer circumference of each roller in attaching a protective film on a surface of a wafer. A device for attaching protective film includes a table(110) and a guide roller(140a). A wafer is positioned on the table. The guide roller is installed on a top of the table, and guides supply of a protective film. A tension roller(131) is installed in the other side of the guide roller, and supplies tensile force toward opposite direction about the supply direction of the protective film. A pressure roller(121) is installed between the guide roller and the tension roller, and attaches the protective film(200) on a surface of the wafer. An ion supply part supplies an ion to the pressure roller. When the protective film is attached on the wafer, the ion is spayed from the pressure roller to the protective film.
Patent KR-20090016310-A (KR)
Title: Plate type heat transfer device
Inventor: LEE CHANG HO
IPC: F28F3/12
Filed: 2007-08-10
Abstract: A plate type heat transfer device is provided to prevent chemical reaction between a wick structure and refrigerant so as to prevent the deterioration of heat transfer capacity due to the refrigerant. A case(100) has a vacuum hollow part(S) inside and is injected with refrigerant which generates phase change by heat. A wick structure(200) is mounted in the case and formed of a plurality of unit fibers for moving condensed refrigerant to capillaries generated by gaps between the unit fibers. From the wick structure, impurities such as coating and dying agents, which induce chemical reaction with respect to the refrigerant in the case, are removed by drying at 100°C~120°C.
Patent KR-20090017007-A (KR)
Title: The control method of air conditioner
Inventor: KIM SUHG OO
IPC: F24F11/02
Filed: 2007-08-13
Abstract: A method for controlling a system air conditioner is provided to control an indoor unit stably and effectively based on room environment information sensed by a major sensor node. A method for controlling a system air conditioner includes the steps of selecting a major sensor node among a plurality of sensor nodes according to indoor environment information sensed by the plurality of sensor nodes(640), turning off power for all the sensor nodes except the major sensor node(660), and controlling an indoor unit based on the indoor environment information transmitted from the major sensor node.
Patent KR-20080030919-A (KR)
Title: Hydrogen generator and fuel cell having the same
Inventor: JANG JAE HYUK
IPC: C01B3/08
Filed: 2007-08-20
Abstract: A hydrogen generator is provided to generate easily hydrogen using sodium hydroxide of a low concentration, easily store generated hydrogen and reduce the preparation cost, and a fuel cell is provided to handle and use the fuel cell conveniently and generate electricity using hydrogen that is stably generated at a room temperature without generating carbon monoxide or carbon dioxide. A hydrogen generator(1) comprises: a tank(10) filled with a predetermined quantity of water; a first reactor(20) containing an aluminum powder that generates alumina and hydrogen by a first reaction with water supplied from the tank; a second reactor(30) containing an alkali solution that generates sodium aluminate and water by a second reaction with alumina supplied from the first reactor; and a circulation part(40) that circulates the alkali solution of the second reactor to the first reactor. A fuel cell comprises: a tank filled with a predetermined quantity of water; a first reactor containing an aluminum powder that generates alumina and hydrogen by a first reaction with water supplied from the tank; a second reactor containing an alkali solution that generates sodium aluminate and water by a second reaction with alumina supplied from the first reactor; a circulation part that circulates the alkali solution of the second reactor to the first reactor; and an electricity generating part that generates electricity by receiving hydrogen from the second reactor.
Patent KR-20090019327-A (KR)
Title: Fish block
Inventor: PAKR YOON HEE
IPC: E02B3/14
Filed: 2007-08-20
Abstract: A garden type fish staying block is provided to utilize a function as a river and a terrace land of the river as accumulated soil can be cleaned with the flow of the river water. A garden type fish staying block comprises: a pathway(11) formed in the inside with being bored to the left and right; a large size gateway(7) in which the fish or man can enter and leave and the front having a side native rock pattern(9) is bored to the pathway; a main body(2) including a secondary gateway(8) only for the fish to enter and leave; a vegetation space installed on the top of the main body for a timber and plant to live in the inside; an open and close hole bored to the floor to insert boulder to the pathway inside; and a garden part(3) including a cover plate(6).
Patent KR-20090020798-A (KR)
Title: Semiconductor manufacturing apparatus
Inventor: JANG TAEK YONG
IPC: H01L21/20
Filed: 2007-08-24
Abstract: A manufacturing apparatus for a semiconductor is provided to form an epi layer on each pair of semiconductor substrate uniformly by processing a pair of semiconductor substrates by facing each other with being granular. A pair of wafers facing each other is mount/drawn out in a reaction chamber by a boat. A pair of heater parts are arranged in the rear side of a pair of semiconductor substrates respectively. A predetermined epi process is performed to a pair of wafers in the reaction chamber by a pair of heater parts. A process gas nozzle(76) is installed in order to surround the upper peripheral part of a pair of semiconductor substrates and supplies process gas. An exhaust gas nozzle(78) is installed in order to surround the lower peripheral part of a pair of semiconductor substrates and exhausts the process gas. An anti-corrosion gas nozzle is arranged in the peripheral part of the heater part.
Patent KR-20090022719-A (KR)
Title: Pencil-writting lecture system and method for operating the same
Inventor: LEE DO HUN
IPC: G06Q50/20
Filed: 2007-08-31
Abstract: A pencil-writing lecture system and a method for operating the same are provided to photograph only a predetermined lecture form and store the file of the photographed lecture form, thereby watching the stored lecture through a homepage. A camera photographs a predetermined study sheet lectured by pencil-writing of a lecturer. A server is connected to a camera. The server stores the photographed lecture by a moving picture file. The server uploads the moving picture file to a homepage. And the server provides the predetermined lecture sheet to students through the homepage.
Patent KR-20090026984-A (KR)
Title: A slurry composition for chemical mechanical polishing of insulation layer
Inventor: KIM SEOK JU
IPC: C09K3/14
Filed: 2007-09-11
Abstract: A slurry composition for chemical mechanical polishing is provided to ensure little scratch, high polishing speed to the insulating layer, and stability of the slurry. A slurry composition for chemical mechanical polishing for insulation layers comprises silica as an abrasive, a polishing accelerant, a pH adjusting agent and deionized water. The polishing accelerant is one or more mixtures selected from the group consisting of an organic acid, inorganic acid, amino acid, chelating agent and their salt.
Patent KR-20080030948-A (KR)
Title: Superabsorbent particles containing carboxyalkyl cellulose and methods for their preparation
Inventor: WEERAWARNA S ANANDA
IPC: C08L1/10
Filed: 2007-10-02
Abstract: A superabsorbent particle containing carboxyalkyl cellulose is provided to obtain a superabsorbent body useful for producing sanitary personal care products by using a biodegradable, regenerable and cost efficient material. A superabsorbent particle comprises a combination of any one of galactomannan polymer and glucomannan polymer with carboxyalkyl cellulose. The particle contains a plurality of multi-valent metal ion crosslinking bonds, wherein the metal ion is selected from the group consisting of aluminum, boron, bismuth, titanium, zirconium and a mixture thereof. The galactomannan polymer or the glucomannan polymer is present in an amount of 1-20 wt% based on the total weight of the particles. The carboxyalkyl cellulose is present in an amount of 60-99 wt% of the total weight of the particles.
Patent KR-20080102932-A (KR)
Title: Insulation frame of vacuum open/close device
Inventor: TOTTORI HIROSHI
IPC: H01H33/66
Filed: 2007-10-04
Abstract: An insulating frame of a vacuum open/close device including a vacuum bulb is provided to adjust a stroke within an insulating frame, to have a higher mechanical rigidity by securing an insulation performance of an insulating frame. An insulating frame of a vacuum open/close device comprises the followings: a fixing side conductor(1d) having a fixing contact(1b); a driving side conductor drawn from a vacuum container; a vacuum container(1a) mounting a driving side conductor(1e) having a driving contact(1c); an insulation rod(8) adjacent to a driving device of the driving side conductor; a vacuum bulb(1) installing a stroke control part controlling a voltage of the fixing contact and a voltage of the driving contact; a insulating frame(2) of a barrel receiving the vacuum bulb; and a fixing side terminal(3) connected to the fixing side conductor.
Patent KR-20090037093-A (KR)
Title: Vehicle air conditioning system with heat exchanger element
Inventor: IM SEONG GU
IPC: B60H1/00
Filed: 2007-10-11
Abstract: An automotive air conditioning system with a heat exchanger element is provided to improve energy efficiency and reduce load to a vehicle by reusing waste heat and moisture in cooling and heating outside air. An automotive air conditioning system with a heat exchanger element comprises an intake path(51) and an exhaust path(52) which are crossed and located in the front of the automotive air conditioning system. A heat exchanger element(10) is mounted on the cross point of the intake path and the exhaust path. The outside air(B) flowed through the intake path and the indoor air(A) exhausted through the exhaust path are not mixed. The heat and moisture of the air are exchanged with the heat exchanger element.
Patent KR-20080035987-A (KR)
Title: Mobile wireless communications device with multiple rf transceivers using a common antenna at a same time and related methods
Inventor: WEN GEYI
IPC: H01Q5/10
Filed: 2007-10-19
Abstract: A mobile wireless communication terminal with a multiple RF(Radio Frequency) transceiver which simultaneously uses a common antenna and a manufacturing method thereof are provided to offer a small antenna structure and a multi-frequency operation over a very wide frequency range. A common antenna(33) is supported by a housing and has plural isolated signal supply points. Plural RF transceivers are supported by the housing and combined with signal supply points of the common antenna. Each RF transceiver includes plural RF transceivers having different operation frequencies related to the RF transceivers. A controller selectively drives at least a portion of the RF transceivers so that the common antenna is used in common. A dielectric substrate(37) is supported within the housing. The common antenna includes at least one conductive trace on the dielectric substrate. At least one signal supply point among the signal supply points is located at an inner common antenna member(43) or an outside common antenna member(42).
Patent KR-20090045975-A (KR)
Inventor: SONG HO DEUK
IPC: B60J5/04
Filed: 2007-11-05
Abstract: 본 발명은 자동차의 도어 윈도우 및 선루프 통합 제어 시스템에 관한 것으로서, 도어 윈도우 및 선루프를 동시에 개폐함과 아울러 상기 도어 윈도우 및 선루프를 닫을 때 열린 상태를 기억하였다가 닫은 후 다시 열 때 닫기 전 열린 상태로 열 수 있도록 하여 편의성을 증대한 것이다. 
     본 발명은 홀센서(12)와 도어 개폐 스위치(13)의 출력신호를 입력받아 도어 윈도우 모터(14)를 각각 제어하는 도어 드라이브 모듈(11)를 구비한 도어 윈도우 개폐기구(10)와, 홀센서(22) 및 선루프 개폐 스위치(23)의 출력신호를 입력받아 선루프 글라스 모터(24)를 제어하는 선루프 콘트롤 모듈(21)을 구비한 선루프 개폐기구(20)의 상기 도어 드라이브 모듈(11)과 선루프 콘트롤 모듈(21)을 캔(can)통신(33a)(33b)으로 조작 스위치(32)에 의하여 제어되는 보디 콘트롤 모듈(31)에 연결하여서 된 것이다. 
       
     홀센서, 도어 드라이브 모듈, 선루프 콘트롤 모듈, 보디 콘트롤 모듈, 조작 스위치
Patent KR-20090047578-A (KR)
Inventor: MOON KYEONG HO
IPC: B61F5/26
Filed: 2007-11-08
Abstract: 본 발명은 조향제어를 위한 가상고정축 설정방법에 관한 것으로, 보다 상세하게는 전륜만 조향될 때, 후륜이 고정되는 고정축 역할을 하는 것에 착안하여 움직이지 않는 가상의 축을 설정하고 이를 기준으로 하여 차량의 조향을 제어할 수 있도록 함과 동시에, 굴절차량과 같이 2량 이상 편성된 다축차량으로 확장 적용이 가능하고, 차량이 기하학적 구조에 맞게 설정되어 구조적 결함의 사전 제거가 가능하며, 차량이 최적의 회전반경으로 선회할 수 있도록 하는 조향제어를 위한 가상고정축 설정방법에 관한 것이다. 
     본 발명은 굴절차량의 차륜 조향시, 가상고정축을 지나는 한 점에서 차량의 회전중심이 일치하도록 차량을 제어하기 위하여 움직이지 않는 가상고정축을 설정하는 것을 특징으로 한다. 
       
     가상고정축, 조향제어, 굴절차량, 굴절각, 조향각, 안전기준
Patent KR-20090047999-A (KR)
Inventor: KIM KYOUNG CHEOL
IPC: C07C69/80
Filed: 2007-11-09
Abstract: 본 발명은 DTDP의 제조방법에 관한 것으로서, 수집관에 무수 프탈산의 침상 결정체가 생성되는 것을 방지하는 제조방법에 관한 것이다. 
      본 발명의 제조방법은 무수 프탈산과 트리데실 알콜을 투입하는 단계; 상압 반응단계; 냉각 단계; 수산화 나트륨 수용액을 투입하는 탈산 단계; 일차 정치 단계; 수세 단계; 이차 정치 단계; 및 진공 반응 단계로 이루어진다.  
     상기 제조방법으로 DTDP를 제조하는 경우, 무수 프탈산의 침상 결정체 생성이 억제되어 반응속도의 향상, 제품 순도 및 수득률의 향상 및 제조 시간이 단축되는 효과가 있다.  
       
     DTDP, 침상 결정체, 무수 프탈산, 트리데실알콜, 무수망초
Patent KR-20090050125-A (KR)
Inventor: PARK JUNG HOON
IPC: H04L29/06
Filed: 2007-11-15
Abstract: 본 발명은 TCP(Transmission Control Protocol) 성능 증대에 관한 것으로, 무선 네트워크에서 전송 제어 프로토콜의 성능을 향상시키는 기지국의 장치에 있어서 수신한 패킷의 도착시간의 차를 계산하는 패킷 모니터링 부와 상기 도착시간의 차 및 상기 수신한 패킷에 대한 전송 패킷의 시간을 이용하여 전송 제어 프로토콜 서버의 재전송 타임 아웃 값을 추정하는 재전송 타임 아웃 추정부와 상기 재전송 타임 아웃 값을 자동 재전송 요구 프로토콜에 반영하는 자동 재전송 요구 프로토콜 비교 및 재설정부를 포함하는 것으로 기지국에서 TCP 서버의 동작을 추정하고 그에 맞게 TCP 서버가 허용할 수 있는 만큼의 오류를 줄일 수 있어. TCP에 있어서 유선 상의 성능과 동일한 성능을 발휘할 수 있다. 
       
     TCP, SERVER, CLIENT, RTT, SRTT, RTO.
Patent KR-20090050396-A (KR)
Inventor: KIM YONG SUNG
IPC: H04L12/28
Filed: 2007-11-15
Abstract: 본 발명은 멀티캐스트 서비스를 제공받는 이동 단말기가 이종 망으로 핸드오버 시 현재 서비스 받고 있는 멀티캐스트 서비스를 끊기지 않고 지속적으로 제공받을 수 있도록 하기 위한 방법에 관한 것이다. 이를 위해 본 발명은 이동 단말기와, 적어도 둘 이상의 네트워크를 포함하는 통신 시스템에서 멀티캐스트 핸드오버 방법에 있어서, 핸드오버 중재서버는 주변 네트워크의 멀티캐스트 서비스 지원 여부 및 주변 네트워크에서 가입한 멀티캐스트 그룹 정보를 포함하는 멀티캐스트 정보를 관리하는 과정과, 상기 이동 단말기는 핸드오버 필요 시 상기 핸드오버 중재서버로 상기 멀티캐스트 정보를 요청하는 과정과, 상기 이동 단말기는 상기 핸드오버 중재서버로부터 상기 멀티캐스트 정보를 수신하면 상기 멀티캐스트 정보를 확인하여 현재 제공받고 있는 멀티캐스트 서비스와 동일한 서비스를 제공하는 네트워크가 있으면 상기 동일 서비스를 제공하는 네트워크로 핸드오버를 수행할 수 있도록 한다. 
     
     멀티캐스트 서비스, 핸드오버, 이종 네트워크
Patent KR-20090052190-A (KR)
Inventor: LEE DONG JUN
IPC: F01N3/28
Filed: 2007-11-20
Abstract: 본 발명은 배기가스 저감장치에 관한 것으로, 배기가스의 유해성분에 대하여 산화 또는 환원반응을 일으키게 하는 디젤 산화 촉매부와 유해성분의 입자상 물질을 제거하는 필터부의 일측에 각각 삽입되어 디젤 산화 촉매부 및 필터부 사이에 위치하는 연결부를 포함함으로써, 배기가스 저감장치에 대한 내구성을 향상시킬 수 있다. 
       
     자동차, 배기가스, DOC, PM, 담체, 디젤
Patent KR-20090056035-A (KR)
Inventor: CHOI WOO YOUNG
IPC: H04N5/44
Filed: 2007-11-29
Abstract: A method for operating an image device with panel timing data and the image device using the same are provided to prevent a maker from inputting the panel timing data to a source directly by applying the panel timing data stored in a VSC board to a display means. If power of an image device is turned on, panel timing data stored in a module is read(S301). It is checked whether the panel timing data is matched with data stored in a storage means of a VSC(Video Signal Controller) board, which IC connected to the image device(S302). If the panel timing data is matched, the panel timing data is applied to a display screen(S304). If the panel timing data does not matched, the data stored in the storage means of the VSC board and timing data are applied to the display screen.
Patent KR-20090056409-A (KR)
Title: Air damping mount of adjustable effective area type
Inventor: KIM JANG HO
IPC: B60K5/12
Filed: 2007-11-30
Abstract: An air damping mount of an adjustable effective area is provided to improve diminution capability of the air passing through an die channel with rubbing attenuation by controlling the effective area of a die channel. An air damping mount of an adjustable effective area comprises: an engine mounting part(110) fixed to an engine; a main rubber(120) coupled on the lower part of the engine mounting part; an upper chamber(130) installed at the lower part of the main rubber; a working camber(140) installed at the lower part of the upper chamber; a rigid chamber(150) installed at the lower part of the working camber; a plurality of pressure transfer pipes(170) connecting the rigid chamber and the upper chamber; and an effective area control rod(160) installed at the rigid chamber to ascend and descend vertically through an installation hole(154).
Patent KR-20090038778-A (KR)
Title: Treadmill with automatic speed control and control module of the same
Inventor: PARK JAE SANG
IPC: A63B22/02
Filed: 2007-12-12
Abstract: A treadmill and a control module are provided, which can receive various motion patterns of a user and rapidly follows the acceleration and retardation of a user. A treadmill comprises: a main body member in which the running belt supporting a user is installed; a user sensor which is installed at the fixed region of the main body member and senses the movement of a user; a drive motor(4000) which is coupled with the main body member and operates the running belt(5000); a controller(7000) transmitting the first control signal to control the speed of rotation of the drive motor; a motor driving part(6000) controlling the speed of rotation of the drive motor according to the first control signal received from the controller; and a restoring energy processing unit.
Patent KR-20090063608-A (KR)
Title: A method for performing a video conference in a portable terminal and an apparatus thereof
Inventor: CHOI JI HWAN
IPC: H04N7/15
Filed: 2007-12-14
Abstract: A video conference method and a device of a portable terminal are provided to select and reproduce a speaker who is uttering in a video conference, thereby making users who are not talking focus on a speech of the speaker. A wireless communication unit(110) receives video signals having voice and image signals of plural users. A controller(170) selects a video signal of the current speaker based on the received video signals. The controller decodes all frames of an image signal of the selected video signal, and selectively decodes other image signals. A display unit(140) reproduces the image signal. The controller selects a video signal having the highest volume of a voice signal among the video signals, as a video signal of the current speaker.
Patent KR-20090067467-A (KR)
Inventor: KIM BO RA
IPC: A47J47/00
Filed: 2007-12-21
Abstract: 일반적으로 식당이나 가정에서 사용되는 도마들은 음식물을 자를 수만 있도록 되어 있어서 주방용품들의 사용시 도마와 칼과 연마대의 위치가 따로따로 분리되어 있으므로 요식업 종사자들이나 주부들에게 관리 및 사용하기에 상당한 불편을 가져왔다. 또한, 도마의 저면에 연마석을 부착 설치한 도마들도 있으나 이것 또한 위생을 최우선으로 하는 도마의 평면을 뒤집고 난후 부착된 연마석에 칼을 갈아야 하는 불편함이 있으며 비위생적인 면을 내포하고 있었다. 
       
       
     도마
Patent KR-20090069926-A (KR)
Title: Manufacturing process of partion wall for plazma display panel
Inventor: CHOI JONG HYUNG
IPC: H01J11/36
Filed: 2007-12-26
Abstract: A manufacturing process of partition wall for plasma display panel is provided to simplify the manufacturing process by controlling easily the height control of the barrier rib. A transparent electrode(73), a bus electrode(76), a dielectric of upper panel(80), a protective film(85) are formed on a glass substrate(70). An addressing electrode(30), and a lower dielectric(40) and a fluorescent substance(60) are formed on the barrier rib(50) and a lower glass substrate(10). The dielectric layer is formed on the addressing electrode. The dielectric of upper panel forms a wall charge. The photoresist solution or the photosensitivity film is formed on the dielectric. The addressing electrode is formed by the screen printing method.