baber/WOPTO huggingface dataset:
Patent KR-20110123601-A (KR)
Title: Korean hot pepper paste comprising a aloe, and manufacturing method thereof
Inventor: LEE BYOUNG YONG
IPC: A23L11/20
Filed: 2010-05-07
Abstract: PURPOSE: A producing method of red pepper paste containing aloe, and the red pepper paste are provided to prevent the hardening of the surface of the red pepper paste after storing for a long time. CONSTITUTION: A producing method of red pepper paste containing aloe comprises the following steps: dipping 100 parts of starch by weight in water for 4-10 days; removing the moisture from the starch, and crushing; extracting 10-20 parts of malt by weight with 80-120 parts of water by weight, and mixing the obtained malt extract with the crushed starch; saccharifying the starch, and boiling the starch; adding 160-300 parts of fresh aloe jelly or an aloe powder solution by weight into the starch before cooling; mixing the starch with the aloe with 60-100 parts of red pepper powder by weight, 40-80 parts of fermented soybean powder by weight, and 40-80 parts of salt by weight; and fermenting and aging the mixture.
Patent KR-20110006589-A (KR)
Title: Electrolytic hard gold plating solution and plating method of using the same
Inventor: FURUKAWA MASATO
IPC: C25D7/00
Filed: 2010-05-11
Abstract: PURPOSE: A hardened gold plating liquid, capable of suppressing a plated layer on besides a plating section, and a plating method using the same, is provided to install a Ni barrier layer on a small sized connector. CONSTITUTION: A hardened gold plating liquid comprises gold cyanide, cyanide salt, cobalt salt, nitro containing compound, and the compound more than 1 or 2 selected from the group composed of carboxyclic acid, oxy carboxyclic acid and their salts. The concentration of the nitro containing compound is 0.1~20g / L. The plating leakage can be prevented by controlling the electric current density by adjusting the thickness of a gold film of a Ni barrier part(14) less than 0.01μm.
Patent KR-20110126018-A (KR)
Title: 2 cable controled helum filled balloon wind gathering type power plant
Inventor: CHOI JEONG DONG
IPC: F03D5/00
Filed: 2010-05-14
Abstract: PURPOSE: A helium filled balloon type wind power generator controlled by two cables is provided to control an angle between a helium filled balloon and wind by controlling the rate of the lengths of two cables. CONSTITUTION: A helium filled balloon type wind power generator controlled by two cables comprises a helium filled balloon(100), a wind turbine(110), a control cable(120), a power cable(130), a control winch(140), a power winch(150), and a ground fixing plate(160). The helium filled balloon has floating power. A through unit is formed in the center of the helium filled balloon. The wind turbine is installed in the through unit of the helium filled balloon. The control and power cables are connected to the helium filled balloon. The ground fixing plate fixes the control and power winches to the ground and is rotated depending on a wind direction. The control and power winches control the length rate of the control and power cables.
Patent KR-20110127302-A (KR)
Title: Lock
Inventor: LEE YOUNG A
IPC: E05B15/10
Filed: 2010-05-19
Abstract: PURPOSE: A latch type lock is provided to arrange a lock main body with timber, thereby manufacturing various outer lock shapes. CONSTITUTION: A lock main body(10) is arranged with timber of one body. The lock main body comprises an insertion hole(11), a chamber(13), and a latch hole(15). The insertion hole is arranged in the center of the lock main body into a recess shape. A lock bundle(30) is built in the chamber. A latch(20) restrains a locking loop inserted in the insertion hole. A hasp(21) restrains the locking loop by being inserted in the chamber in a state held in the locking loop.
Patent KR-20110130038-A (KR)
Title: A support apparatus of fishing rod
Inventor: PARK SE JIN
IPC: A01K97/10
Filed: 2010-05-27
Abstract: PURPOSE: A supporting device for a fishing rod support is provided to facilitate the installation and removal thereof. CONSTITUTION: A supporting device for a fishing rod support comprises: a fishing rod support fixing device(170) which can fix or release a support board of a fishing rod support between a fixed block and a moving block by moving the moving block forward and backward from the rear of the fixed block; a foldable spreading joint device which folds a front multi-stage support leg; and a spreading joint device capable of controlling the angle of a rear multi-stage support leg.
Patent KR-20110131668-A (KR)
Title: Dynamic gain control optical amplifier system with reconfigurable optical add/drop multiplexing network base on awg
Inventor: MICHAEL MYUNG SUB LEE
IPC: H04B10/294
Filed: 2010-05-31
Abstract: PURPOSE: A light amplification system for controlling a light channel gain based on AWG(Arrayed Waveguide Grating) is provided to improve the network of a communication business by enabling a user to select wavelengths according to the request of a user. CONSTITUTION: A branched WSS(Wavelength selection switch) uses a branch coupler using AWG. An embedded WSS uses an inserting coupler using the AWG. A DCE(Dynamic Channel Equalizer) uses the AWG and a variable light attenuator. A light signal analysis unit uses an OCM(Optical Channel Monitor). A control unit controls functions of the light signal analysis unit, the branched WSS, the DCE, the light signal analysis unit. An input and output control program controls the control unit.
Patent KR-20110137420-A (KR)
Title: 컴퓨터용 마우스
Inventor: JEONG SE CHEOL
IPC: G06F1/16
Filed: 2010-06-17
Abstract: 본 발명의 일 실시예에 따른 컴퓨터용 마우스는 상하 이동가능한 누름버튼을 구비하는 상부 하우징과, 상부 하우징의 하측에 결합되는 하부 하우징과, 일단에서 누름버튼에 결합되는 지지봉과, 지지봉에 결합되는 제1 자석과, 제1 자석과 대향하여 배치되고, 제1 자석과는 척력이 작용하도록 하부 하우징에 고정되는 제2 자석과, 제1 자석과 제2 자석 사이에 배치되고, 지지봉의 하방 이동에 응답하여 신호를 발생시키는 스위치를 포함한다.  제1 자석 및 지지봉은 누름버튼의 상하 이동에 의해 제2 자석에 대해 상하로 이동가능하다.
Patent KR-20100137395-A (KR)
Title: A converter device for driving light sources, related method and computer program product
Inventor: FACCIN MARCO
IPC: H05B41/14
Filed: 2010-06-22
Abstract: PURPOSE: A converter device, a method thereof, and a computer program thereof are provided to remarkably reduce the loss of a resistor by supplying a low voltage. CONSTITUTION: A self-oscillating output terminal(112) drives at least one light source part(L). A starter circuit(120) starts the self-oscillating of the output terminal. A control circuit(108) drives the starter circuit in order to selectively start the self-oscillating of the output terminal. The starter circuit comprises a RC network and an electronic switch which has a capacitor capable of being charged form a voltage.
Patent KR-20120000748-A (KR)
Title: Semiconductor device and method of manufacturing the same
Inventor: PARK BYUNG LYUL
IPC: H01L21/768
Filed: 2010-06-28
Abstract: PURPOSE: A semiconductor device and a manufacturing method thereof are provided to improve signal and data transfer rates by reducing parasitic capacitance between silicon penetrating via contact and a semiconductor substrate. CONSTITUTION: A first circuit pattern(12) is formed on a substrate(10). An inter-layer insulating film(14) comprises a penetration hole which passes through from the upper side to the inner side of the substrate. An insulating film structure(18) is consecutively formed along the sidewall and bottom surface of the penetration hole, and the upper side of the inter-layer insulating film. Silicon penetrating via contact(24) is included inside the penetration hole. A buffer layer(26) covers the silicon penetrating via contact and the upper side of the insulating film structure.
Patent KR-20120001049-A (KR)
Title: Structure of fuel apparatus for automobile
Inventor: KIM MYEONG HWAN
IPC: F02M25/08
Filed: 2010-06-29
Abstract: PURPOSE: A fuel tank structure of a vehicle is provided to improve design freedom of a fuel tank and a lower panel of a vehicle and increase the cooling efficiency of a fuel pump controller. CONSTITUTION: A fuel tank structure of a vehicle comprises a fuel tank, a fuel pump controller, and a canister(40). The fuel pump controller is mounted on a coupling plate of the canister. The fuel pump controller is inserted into the fixing hole of the canister, and a boss(51) is formed on the outside thereof. The canister is positioned behind the fuel pump. A coupling plane(41) with a fixing hole(42) is mounted on one side of the canister.
Patent KR-20120002028-A (KR)
Inventor: KANG CHAN GO
IPC: G06Q30/00
Filed: 2010-06-30
Abstract: 본 발명은 온라인 경매에 참여하는 소비자들이 경매 마감시간의 제약 없이 입찰가가 단계적으로 상승하는 실시간의 오프라인 경매 방식을 통해 입찰에 참여할 수 있고, 이 과정에서 온라인 경매를 운영하는 서버가 사전 설정된 상승 비율에 의해 산정되는 입찰가들을 단계적으로 제공하고 이에 대해 소비자가 입찰 참여 여부를 선택하는 방식의 경매 진행을 구현하는 경매운영자가 제공하는 예고낙찰가에 대한 실시간 서바이벌 방식의 인터넷 경매 시스템 및 그를 이용한 인터넷 경매 방법에 관한 것으로서, 본 발명의 경매운영자가 제공하는 예고낙찰가에 대한 실시간 서바이벌 방식의 인터넷 경매 시스템은, 다수의 낙찰가 상승률이 조합되어 형성되는 적어도 하나의 낙찰가 상승률 세트 및 경매시작가를 결정하고, 경매가 개시되면 상기 경매시작가에 상기 낙찰가 상승률 세트의 각 낙찰가 상승률이 적용되어 단계적으로 그 액수가 상승된 예고낙찰가들을 경매참가자 단말기에 단계적으로 제공하며, 단일의 경매 참가자 단말기에서만 입찰 참여 신호가 전송된 예고낙찰가를 낙찰가로 결정하는 동시에 해당 경매 참가자 단말기를 낙찰가 단말기로 결정하는 경매 운영 서버와, 상기 경매 운영 서버에 접속하여 단계적으로 제공되는 상기 예고낙찰가에 대해 매 예고낙찰가마다 입찰 참여 신호의 전송 여부를 선택하는 다수의 상기 경매 참가자 단말기를 포함하는 것을 특징으로 한다.
Patent KR-20120002097-A (KR)
Title: 워터파이프 누수 시험장치
Inventor: LIM MI KYOUNG
IPC: G01M3/28
Filed: 2010-06-30
Abstract: 본 발명은 워터파이프 누수 시험장치에 관한 것으로, 보다 상세하게는 에어를 이용하여 워터파이프의 누수 여부를 자동으로 판별함으로써, 워터파이프의 검사공정 효율 향상과 작업자의 편의를 함께 도모할 수 있는 워터파이프 누수 시험장치에 관한 것이다. 
본 발명의 워터파이프 누수 시험장치는 상부다이와, 상기 상부다이상에 설치되며 워터파이프를 상부면에 거치시키는 워터파이프 지지부와, 상기 워터파이프 지지부에 지지된 워터파이프를 고정시키는 고정지그부와, 상기 각 고정지그부 측으로 호스를 통해 에어를 공급하는 에어 분배기와, 상기 에어 분배기 측으로 에어를 공급하는 에어 공급부와, 시험장치의 작동과 에어압 측정 및 비교에 의해 워터파이프의 누수 여부를 판단하는 제어부를 포함하는 구성으로 이루어짐을 특징으로 한다,
Patent KR-20120004245-A (KR)
Title: Vehicle for sprinkling liquefied fertilizer
Inventor: KANG BYOUNG KWON
IPC: B05B15/00
Filed: 2010-07-06
Abstract: PURPOSE: A liquid fertilizer spraying vehicle is provided to effectively spray liquid fertilizer into a vinyl greenhouse by moving along the narrow path in the vinyl greenhouse and between vinyl green houses. CONSTITUTION: A liquid fertilizer spraying vehicle includes a vehicle body, an engine(10), a main shaft(20), a pump(30), a pump operating unit, a reel(50), a reel operating unit, and a auxiliary winding unit. A loading box is arranged at the rear side of the vehicle body. The engine is installed in the loading box. The main shaft rotates based on the power of the engine. The pump operates by being selectively received the torque of the main shaft and compulsively discharges liquid fertilizer through a hose. The pump operating unit operates the pump. The reel is selectively received the torque of the main shaft and rotates, and the hose is wound around the outer circumference of the reel.
Patent KR-20120005896-A (KR)
Title: Composition for treatment or prevention of colitis
Inventor: KIM DONG HYUN
IPC: A61K36/424
Filed: 2010-07-09
Abstract: PURPOSE: A pharmaceutical composition containing saponin is provided to effectively prevent or treat colitis. CONSTITUTION: A pharmaceutical composition for preventing or treating colitis contains saponin as an active ingredient, including soyasaponin I, soyasaponin Ab[3-O-beta-D-glucopyranosyl-(1→2)-beta-Dgalactopyranosyl-(1→2)-O-beta-D-glucuronopyranosyl, 22-O-beta-D-2,3,4,6-tetra acetyl-glucopyranosyl (1→2)-alpha-L-arabinopyranosyl soyasapogenol A], soyasapogenol A, soyasapogenol B, gypenoside LXXIV, gypenoside XLV, TN-2[2alpha,3beta,20(S)-trihydroxydammar-24-ene-20-O-[alpha-L-rhamnosyl (1→6)-beta-D-glucopyranoside], kalopanaxsaponin H, kalopanaxsaponin B, kalopanaxsaponin A, lancemacide X, echinocystic acid 3-O-beta-Dglucuronopyranoside, or echinocystic acid. The sponin is isolated from extract or fermentation of soybean, bean sprout, Gynostemma pentaphyllum, kalopanacis Cortex, or Condonopsis lanceolata Trautv. The colitis includes UC(ulcerative colitis) or Crohn's disease(CD). The pharmaceutical composition also contains the extract or fermentation as an active ingredient.
Patent KR-20120008625-A (KR)
Title: Mobile Communication Terminal
Inventor: Yun dae woong
IPC: H04M1/02
Filed: 2010-07-19
Abstract: PURPOSE: A mobile communication terminal is provided to secure the uniformity of vibration by connecting a front cover to a housing. CONSTITUTION: A housing receives a touch screen panel. A front cover(200) is located in the front part of the touch screen panel. The front cover fixes the touch screen to the housing. The front cover comprises bonding portions(210,220) to an upper and a lower portion and a side portion. Adhesive made of heterogeneous materials is respectively spread to the bonding portions.
Patent KR-20120018233-A (KR)
Title: Novel derivatives of alkyldiol compound and whitening composition for external skin comprising the same
Inventor: LEE DA YUN
IPC: C07C41/22
Filed: 2010-07-19
Abstract: PURPOSE: An alkyldiol derivative compound is provided to facilitate processes such as the reduction of skin irritations, and the ability to retain the generation of melanin and pigmentation. CONSTITUTION: An alkyldiol derivative compound comprises: a step of dissolving an alkyldiol compound in chemical formula (II); a step of alkylation or esterification in the presence of a catalyst at the temperature of (-60) - 30 °C, by adding dissolved alkyl halide or acryl halide into a solvent; and a step of separation and purification after the reactions. In chemical formula (II), n is 0-14, and m is 0-13. An externally applied composition for skin whitening comprises the alkyldiol derivative compound with a weight ratio of 0.001-10 weight%.
Patent KR-20120009740-A (KR)
Title: Display Panel and Method for Manufacturing the Same
Inventor: BANG HYUNG SEOK
IPC: G02F1/035
Filed: 2010-07-21
Abstract: PURPOSE: A display panel and a manufacturing method thereof are provided to control an optical field in order to have rapid response speed and to modulate light which is radiated from light source. CONSTITUTION: A display panel includes a substrate(100), a light coupler(400), a plurality of pixel elements and an optical switch array. The substrate is defined on a matrix. A light coupler is formed in a non-display area of the substrate. Light is incident to the substrate. A plurality of pixel elements is formed on the substrate. The optical field is modulated. The optical switch array is connected to the light coupler.
Patent KR-20120015745-A (KR)
Title: Led illumination lamp
Inventor: PARK KI JU
IPC: F21V17/00
Filed: 2010-08-13
Abstract: PURPOSE: An LED illumination lamp is provided to improve heat radiation by radiating heat from a light emitting diode outside through a case. CONSTITUTION: A reflector of a metal material installs inside the main case. A heat sink(140) of a planar structure is arranged in one side of an LED fluorescent lamp. A plurality of heat radiation fins(141) are formed in the outer surface of the heat sink A slide groove(142) is protruded from the outside surface center of the heat sink. A tube(150) of a transparent material is fixed and coupled with the heat sink. A base(170) is formed while covering both ends of tube and heat sink.
Patent KR-20120058637-A (KR)
Title: 실시간 경품관리시스템과 연동한 주류관리시스템과 그 방법
Inventor: JOH WANG JE
IPC: G06K17/00
Filed: 2010-08-16
Abstract: 실시간 주류관리시스템이란 가짜주류 방지와 세금포탈에 대한 방지를 위한 세원정보를 확보하기 위한 방법으로 현재 다양한 방법이 시도되고 있지만 현실적인 한계로 실제 도입에는 실패하고 있어 모든 한계를 극복하면서도 즉시 도입할 수 있는 방안을 제시하는 것으로, 가짜주류의 가장 큰 피해자인 최종 소비자를 경품행사를 통해 시스템의 주요한 담당자로 참여시킴으로써 정확한 정품인증이 될 수 있도록 하는 것으로, 주류에 부착되어 있는 정품인증 태그에 있는 숫자코드를 무선단말기에 입력하거나, (1,2차원)바코드를 스캔하여 정보를 입력하거나, 바코드를 사진으로 찍어서 조회용 사이트로 전송하여 코드를 인식하거나, RFID태그를 스캔하여 주류코드를 인식하여 전송하면, 주류관리시스템에서 즉시 해당 주류의 판매 업소에 대한 정보, 주류에 대한 정보, 판매대상, 등록된 일자 및 조회된 횟수까지 정보를 제공하고, 정보가 일치하는 경우 경품행사에 참여할 수 있도록 하고, 일치하지 않거나 정보가 없는 경우 정품이 아닐 수 있으므로 신고를 하도록 유도하고, 신고하여 가짜 주류를 판매한 사실이 확인되는 경우 포상금을 지급함으로써 가짜주류를 시장에서 근절할 수 있도록 하는 것인데, RFID태그는 시스템의 핵심이 아니라 코드를 최종 판매 업소까지 전달하기 위한 편리한 도구로의 가치가 더욱 중요하고, RFID태그는 정품인증을 위한 다양한 인식방법 중의 1개라는 것이 중요하고, RFID태그를 읽을 수 있는 장비는 유통단계에 있는 주류회사, 총판, 대리점에만 있으면 되므로 시스템의 구축에 따른 비용도 많이 들지 않으면서도 즉시 도입이 가능하다는 것이다.
Patent KR-20120020437-A (KR)
Title: Support for cable drum
Inventor: IM CHANG HO
IPC: H02G1/06
Filed: 2010-08-30
Abstract: PURPOSE: A supporting board for a cable drum is provided to autonomously load a drum rolled with a cable by using a lifting device and to improve productivity by reducing waiting time. CONSTITUTION: A lifting device(120) is installed in a frame(110) of a frame shape. The lifting device is formed in order to load a cable drum on the upper side of the frame. The lifting device comprises a lifting arm(123) having a cylinder(121) and a hook(122). A cylinder which is coupled in a first hinge shaft by a hinge is installed on one side of the frame to be possible to rotate. One-side end of the lifting arm is coupled to a second hinge shaft by the hinge. A center part of the lifting arm is coupled in a third hinge shaft by the hinge. A rail is installed on the upper side of the frame in order to transfer the cable drum.
Patent KR-20120020832-A (KR)
Title: Multi-purpose box
Inventor: KIM JIN KOOK
IPC: B65D5/44
Filed: 2010-08-31
Abstract: PURPOSE: A multi-purpose box having the shape of stacked books is provided to stably maintain the structure of the box by connecting the rear sides of the box to the inner surface of a connection plate. CONSTITUTION: A multi-purpose box having the shape of stacked books includes the following: a bottom plate(10) and a cover plate(12); a connection plate(13) with a folding line(17) on the center connects the rear side of the bottom plate and the rear side of the cover plate; an outer box(14) attached to the upper side of the bottom plate; an inner box(15) inserted into the outer box; and an upper box(16) with a rear side wall attached to the upper inside of the folding line.
Patent KR-20120022343-A (KR)
Title: Apparatus for treating waste solution
Inventor: JIN YONG HEE
IPC: C02F1/40
Filed: 2010-09-02
Abstract: PURPOSE: An apparatus for treating a waste solution is provided to maximize the separating and discharging efficiency of waste solutions in form of gel or liquid based on the rotation and the grinding of a waste solution treating part. CONSTITUTION: An apparatus for treating a waste solution includes a waste solution treating part(10), a rotation driving part(30), and a waste solution collecting part. The waste solution treating part receives waste solution from a waste solution tank through a waste solution supplying part(20). A plurality of discharging holes(11b) is formed at the waste solution treating part to discharge the supplied waste solution. The rotation driving part rotates the waste solution treating part. The waste solution collecting part collects waste solution from the waste solution treating part. The apparatus further includes a waste solution gel discharging part(60) at the opposite side of the discharging holes in the waste solution treating part.
Patent KR-20120028599-A (KR)
Title: Mold for a resin molding objection
Inventor: LEE KYUNG JOON
IPC: B29C33/76
Filed: 2010-09-15
Abstract: PURPOSE: A forming mold for a molded resin article is provided to prevent molding residues from remaining on a runner and a gate using a middle cavity plate. CONSTITUTION: A forming mold for a molded resin article comprises a runner(35), gates(36,37), and a forming block. The gates are branched from the runner and are extended. Cavities(34) of the forming block are connected to the gates and are filled with resin materials. The forming block is composed of a main block(32) and a middle cavity plate(33). A substrate(10) is inserted into the middle cavity plate. The middle cavity plate has an insertion groove(38), a through hole(39), and a stopping protrusion(40). The stopping protrusion is formed around the through hole and touches one surface of the substrate.
Patent KR-20120029282-A (KR)
Title: Solar cell and method of fabricating the same
Inventor: BAE DO WON
IPC: H01L31/04
Filed: 2010-09-16
Abstract: PURPOSE: A solar battery and a manufacturing method thereof are provided to alleviate heat expansion difference between an electrode layer and a support layer by including a thermal expansion buffer layer which is placed between the electrode layer and the support layer. CONSTITUTION: An electrode layer(200) is arranged on a substrate(100). The substrate comprises a support layer(110) and a thermal expansion buffer layer(120). The thermal expansion buffer layer is arranged on the support layer. The thermal expansion buffer layer is contiguous to the electrode layer. The support layer and the thermal expansion buffer layer are formed into one body. The thermal expansion buffer layer comprises a polymer layer. Metal is doped in the polymer layer. The thickness of the thermal expansion buffer layer is 50 to 500nm. The electrode layer comprises molybdenum.
Patent KR-20110035902-A (KR)
Title: Seedling transplanter
Inventor: KUSAMOTO HIDEYUKI
IPC: A01C11/00
Filed: 2010-09-17
Abstract: PURPOSE: A seedling transplanter is provided to easily eliminate mud attached to the upper part of a seedling frame using a scraper. CONSTITUTION: A seedling transplanter comprises: a seedling part(80) which moves to the right and left along a seedling frame and supplies seedlings to a seedling outlet; a scraper(29) mounted on the lower part of the seedling part; and a groove(29a) installed at the scraper which comes into contact with the seedling frame. The bottom of the scraper is easily transformed and removes mud on the seedling frame.
Patent KR-20120029669-A (KR)
Title: The compositions for road repair and paving the surface of road
Inventor: SUR DONG HURK
IPC: C09D175/04
Filed: 2010-09-17
Abstract: PURPOSE: A composition for repairing road and paving surface of road is provided to have excellent adhesion with the surface of road and penetrability to the crack of road, to facilitate construction, and to have short construction period. CONSTITUTION: A composition for repairing road and paving surface of road comprises 52.3-71.4 parts by weight of wet-curable urethane and 14.3-45.5 parts by weight of yellow soil powder. The composition comprises 10.5-14.3 parts by weight of cement and/or 14.3-14.6 parts by weight of highly flowable non-shrinkable early strength agent, 10.5-14.3 parts by cement, and 1.7 parts by weight of ferric oxide, on the basis of 52.3-71.4 parts by weight of the wet-curable urethane. The composition comprises thinner for urethane with the weight of 30% or less of wet-curable urethane.
Patent KR-20120031666-A (KR)
Title: Composition comprising anacardic acids for enhansing control of harmful algae, and method for controlling harmful algae using the same
Inventor: KIM JIN SEOG
IPC: A01N37/10
Filed: 2010-09-27
Abstract: PURPOSE: A composition containing anacardic acids and a prevention method using the same are provided to ensure low toxicity to good algae and to prevent harmful algae. CONSTITUTION: A composition for preventing harmful algae contains anacardic acids or natural products or anacardic acid chloride containing 50% of anacardic acid. The composition further contains menadione, menadione sodium bisulphate, nanosilver, or chrysophanol as an additive. The anacardic acid is prepared by adding basic solution to a mixture of anacardic acid and low carbon number alcohol. The harmful algae include Microcystis, anabaena, oscillatoria, spirulina, aphanizomenon, nodularia, cochlodinium, stephanodiscus, chlorella, chalamydomonas, scenedesmus, or botryococcus.