baber/WOPTO huggingface dataset:
Patent KR-940000930-B1 (KR)
Title: Picture signal processing device for fax
Inventor: KI HO-KYONG
IPC: H04N1/00
Filed: 1991-07-24
Granted: 1994-02-04
Abstract: The apparatus for processing the image signal in facsimile comprises a sample/holder for sampling the picture signal, a first D/A converter for converting the sampled signal to analog, an ABC circuit for determining whether the pixel is black or white, an analog switch for setting white level and executing half tone mode, a second D/A converter for converting the input picture signal to analog and setting the reference level thereof, and a comparator for determining whether it is white or black to process the picture signal. Thus this invention enhances the resolution of image on account of amending the picture with amending factor.
Patent KR-940011667-B1 (KR)
Inventor: IKUMI NOBUYUKI
IPC: G06F12/08
Filed: 1991-07-26
Granted: 1994-12-23
Abstract: 내용 없음.
Patent KR-950008204-B1 (KR)
Inventor: ISHIDA NORITOSHI
IPC: C08G18/76
Filed: 1991-10-23
Granted: 1995-07-26
Abstract: 내용 없음.
Patent KR-940003624-B1 (KR)
Title: Apparatus for korean characters and chinese characters on vga system and method therefor
Inventor: CHOE CHA-BONG
IPC: G06F3/14
Filed: 1991-11-09
Granted: 1994-04-25
Abstract: The Korean/Chinese character processing apparatus and method includes a video memory decoder for decoding a Korean/Chinese character code and properties of character according to a control signal and storing the result in a text buffer, a timer interrupt for generating an interrupt signal periodically, a refresh bias for reading the character code and character properties stored in the text buffer, a character image information memory for storing character image information corresponding to the character code, an image memory decoder for disabling a VGA video memory and ROM bias and enabling the character image information memory, a VGA video memory for storing character image information and image information, and an image processor for displaying data of the VGA video memory onto a screen, thereby enabling efficient use of memory.
Patent KR-0139789-B1 (KR)
Inventor: LEE TAE-SUNG
IPC: H04N5/14
Filed: 1991-11-13
Granted: 1998-06-15
Abstract: NTSC 방식의 복합 영상신호를 기수 피일드와 우수 피일드로 구별하여 신호 처리하는 영상신호 처리 시스템에 있어서 복합 영상 신호로 부터 안정된 피일드 인식 신호를 발생하기 위한 회로이다. 
     복합 동기신호로 부터 복합 동기신호를 분리하고, 상기 복합 동기 신호를 적분하여 수직 동기 신호를 발생하여, 설정된 로드 데이타를 상기 수직 동기신호에 의해 로드하여 상기 복합 동기신호 입력에 따라 다운 카운팅하며, 상기 수직 동기신호에 의해 논리상태가 반전되고 상기 다운 카운팅 완료시마다 클리어되는 피일드 인식 신호를 발생한다. 
     따라서 복합 영상신호에 포함되어 있는 노이즈 등의 영향을 받지 않는 안정된 피일드 인식 신호를 발생한다.
Patent KR-0185215-B1 (KR)
Inventor: OHTORI AKIRA
IPC: A61K9/00
Filed: 1991-11-22
Granted: 1999-05-01
Abstract: 항염제 또는 세포증식길항제를 특정 폴리락트산에 균일하게 분산시키고 특정형상으로 형성함으로써 제조되는, 망막/초자체 질환 또는 녹내장의 수술후 안구내에 적용되는 안구내 삽입용 서방성 약제 및 수술후 상기 질환 또는 녹내장의 재발을 방지하는 방법에 관한 것이다.
Patent KR-930010991-B1 (KR)
Title: Dyeing tool of hair and dyeing method thereof
Inventor: WI BYONG-HWAN
IPC: A41G3/00
Filed: 1991-12-23
Granted: 1993-11-19
Abstract: This relates to new method and device for  hair  dyeing.  The dyeing device comprises a one-color dyeing hair bundle  (1)  which is fixed to a meltable adhesive  member  (2);  a  clip  (3)  which grasps color hair bundle (1) and original hair;  and  an  electric iron (6). In dyeing, needed original hair  is  grasped  by  clips; required color hair is cutted  from  the  color  hair  bundle  and contacted with grasped hair;  heating  and  melting  the  adhesive member by the electric iron. By this method  partial  hair  dyeing can be done easily.
Patent KR-950009569-B1 (KR)
Title: Method to grant interrupt priority to micro-controller
Inventor: CHO DOK-SANG
IPC: G06F13/00
Filed: 1991-12-31
Granted: 1995-08-24
Abstract: The method for applying an interrupt priority to a microcontroller is characterized in that small numbers are applied from the highest interrupt priority, and detection is sequentially performed from number "0", and if an interrupt is detected, the interrupt is performed and then the detection is performed again from number "0".
Patent KR-940006743-B1 (KR)
Title: Subscriber testing environment system of tdx-10 isdn
Inventor: PARK JONG-DAE
IPC: H04Q1/20
Filed: 1991-12-30
Granted: 1994-07-27
Abstract: A TDX-10 ISDN (integrated services digital network) subscriber testing environment system comprises: a tester having a TD-bus connector, and a MT8980 switch circuit for switching a B channel according to control signals from a logic circuit and other control signals; a subscriber backboard circuit for transmitting/receiving data of the B channel with the tester and processing a D channel transmitted from a subscriber; and a peripheral processor for providing a control signal necessary for switching to the tester through the TD-bus connector, thereby effectively executing a testing.
Patent KR-970005557-B1 (KR)
Title: Plc
Inventor: YANG OH
IPC: G05B19/04
Filed: 1992-01-09
Granted: 1997-04-17
Abstract: A debug operation method of a programmable logic controller additionally mounts a condition determining part and a monitor data editor. The condition determining part judges an operation state of a debug condition and a programmable logic controller.  When the programmable logic controller performs a specific operation in its starting operation, the debug operation method stops the programmable logic controller, so that the user performs a starting operation, and monitors a programmable logic controller state, simultaneously with seeing a debug result state.
Patent KR-950008105-B1 (KR)
Title: Super flat pannel glass for crt
Inventor: JANG HYONG-IL
IPC: H01J29/86
Filed: 1992-03-31
Granted: 1995-07-25
Abstract: The super flat pannel glass of a geometrical video distortion reduction type for a cathode-ray tube is characterized in that thicknesses as Xt,Yt and Dt of X, Y and D axes directions are made up as Xt<Yt<Dt on the inside from an edge of an effective screen of the cathode-ray tube, and thereby the video distortion is reduced and quality of screen is improved.
Patent KR-100212363-B1 (KR)
Inventor: ALAIN BOULANGER
IPC: H03L7/00
Filed: 1992-04-03
Granted: 1999-08-02
Abstract: 위상 동기 장치는 천이 형태의 방해를 보정하는 패스트 루프와 광범위에 걸친 이상을 보정하는 슬로우 루프를 구비한다.
Patent KR-0125729-B1 (KR)
Title: Indoor structure of airconditioner
Inventor: RYU CHANG-SIK
IPC: F24F13/10
Filed: 1992-05-20
Granted: 1998-04-01
Abstract: To give the cool air of lower temperature in cooling, and in heating, the warmer air of higher temperature, the air conditioner comprises the first and second inhale ports(24)(25) for inhaling the indoor air, and the first and second heat exchangers(30)(31) to heat exchange the indoor air into the cool or warm air, also the first and second vent nozzles(27)(29) for the venting air to heat exchanged cool or warm air. And further the first and second cross fans(34)(35) for the indoor air to be vented through the first and second vent nozzles, and the wind direction regulation device(25) for the air heat exchanged to be vented through the second vent nozzle(29) by guiding the air to the second heat exchanger(31).
Patent KR-960016323-B1 (KR)
Inventor: WAHEI KITAMURA
IPC: B65D33/04
Filed: 1992-07-15
Granted: 1996-12-09
Abstract: 요약 없음.
Patent KR-950003290-B1 (KR)
Title: Making method of tensile-strenth 50kg/mm2 steel plate
Inventor: LEE SANG-U
IPC: C21D8/00
Filed: 1992-10-28
Granted: 1995-04-10
Abstract: hot-rolling a steel slab with at least 20% reduction in latter 2-3 times hot rolling steps; finish rolling at above 850 deg.C to at least 20% reduction; water-cooling to 600-500 deg.C with 4-15 dec.C/sec cooling rate; and air-cooling to normal temperature. The steel slab includes (in wt.%) 0.08-0.18% C, up to 0.5% Si, 0.9-1.6% Mn, 0.01-0.1% Al, 0.005-0.03% Ti, 0.01-0.15% V, 0.004-0.02% N, up to 0.03% P, up to 0.02% S, balance Fe and inevitable impurities. The manufactured steel sheet has impact toughness of at least 3.5 Kg f-m and yield strength of at least 36 Kg.f/mm2, and is used as a material for shipbuilding.
Patent KR-100229128-B1 (KR)
Title: Process for the production of cyclopropylmethylketone
Inventor: HUNSTON ROGER DR
IPC: C07C45/59
Filed: 1992-11-14
Granted: 1999-11-01
Abstract: A process is described for the production of the known intermediate cyclopropylmethyl-ketone which delivers a high yield, few side products, high reaction efficiency and turnover, and is more viable practically and commercially. In the presence of an excess of a Periodic Table Group I or Group II metal halide or quaternary phosphonium halide,  alpha -acetyl- gamma -butyrolactone is led continuously into a reaction vessel at 170-200  DEG C and cyclopropylmethylketone distilled off continuously. The halide is recovered and recycled in the process.
Patent KR-970007635-B1 (KR)
Title: Ink container and ink-jet recording apparatus using the same
Inventor: IWATA KAZO
IPC: B65D83/00
Filed: 1992-11-17
Granted: 1997-05-13
Abstract: An ink container includes a cylindrical member having a closed end and an opposite open end; a flexible member covering the open end of the cylindrical member to define an ink containing portion; the flexible member having a bent portion movable along an internal surface of the cylindrical member with consumption of the ink therein, wherein movement of the bent portion is irreversible. <IMAGE>
Patent KR-100239183-B1 (KR)
Inventor: NEUMEISTER ALEXANDER
IPC: B61D17/00
Filed: 1992-11-21
Granted: 2000-03-02
Abstract: 철도 차량의 차체는 벌집형 패널 같은 적층패널을 이용하여 제작된다. 철도차량 측면의 복수의 창은 차량의 가로방향을 따라 일정 피치로 제공된다. 차량의 측면의 측면 구조체는 벌집형 패널로 제작된다. 한 개의 벌집형 패널의 길이는 창의 피치에 복수배로 표준화 된다. 이 창의 피치에 네배 길이인 세 개의 벌집형 패널은 나란히 놓여 서로 용접되고, 이들 양 종단은 길이를 조절하기 위해 벌집형 패널에 용접된다. 차체의 측면 구조체의 대부분의 벌집형 패널이 표준화되기 때문에 차체는 저비용으로 제작될 수 있다. 상기 벌집형 패널 구조체는 한 개의 편성 차량에 대한 다른 차량으로 전환될 수 있다.
Patent KR-950014802-B1 (KR)
Inventor: HASHIMOTO GIYOKAZU
IPC: G11C29/00
Filed: 1992-12-26
Granted: 1995-12-14
Abstract: 내용 없음.
Patent KR-100207158-B1 (KR)
Title: Azeotrope-like compositions of dichloropentafluoropropane and a hydrocarbon containing six carbon atoms
Inventor: HILLEL MAGID
IPC: C23G5/028
Filed: 1990-08-30
Granted: 1999-07-15
Abstract: Stable azeotrope-like compositions consisting essentially of dichloropentafluoropropane and a hydrocarbon containing six carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
Patent KR-960004671-B1 (KR)
Inventor: KENJI NAKACHO
IPC: C08F4/649
Filed: 1993-02-19
Granted: 1996-04-11
Abstract: 내용 없음.
Patent KR-960006648-B1 (KR)
Inventor: HONGO HITOSHI
IPC: A61B3/113
Filed: 1993-03-05
Granted: 1996-05-22
Abstract: 내용없음
Patent KR-960010660-B1 (KR)
Title: Refrigerator
Inventor: KIM SUK-NOH
IPC: F25D17/06
Filed: 1993-05-07
Granted: 1996-08-07
Abstract: The refrigerator minimizes power consumption and loss of cold air by shortening the working time of a compressor and the circulation distance of the cold air. The refrigerator includes a returning route(12) for returning the circulated cold air of the middle part of the freezing chamber(4) to cooler chamber(8), a returning route(14) returning the circulated cold air of the refrigerating chamber(5) from the refrigerating chamber through a side wall of the middle part of refrigerating chamber(4) to cooler chamber(8), a blowing route(15)(15') for vegetable chamber(6), a cold air controller(17) for controlling the amount of the cold air supplied to the blowing route for vegetable chamber, a returning route(16) for returning the circulated cold air of the vegetable chamber to cooler chamber.
Patent KR-970003009-B1 (KR)
Title: Optical path regulating apparatus of projector
Inventor: YUN DONG-SUN
IPC: H04N5/74
Filed: 1993-05-21
Granted: 1997-03-13
Abstract: a substrate where a transistor is built in and whose surface contact terminals are formed on; an actuator where a signal electrode and a common ground electrode are deposited on the surfaces of a first and a second transformation part; and a reflective mirror formed on top of the actuator. The actuator comprises the first and the second transformation part which are polarized in the same direction each other, and the top parts of the transformation parts are connected with each other, being sloped to be crossed each other.
Patent KR-970005943-B1 (KR)
Title: Semiconductor device and method of manufacturing the same
Inventor: KIM JOON-KI
IPC: H01L21/285
Filed: 1993-05-27
Granted: 1997-04-22
Abstract: A tungsten silicide forming method which can prevent separation polysilicon from the tungsten silicide is disclosed. The method comprises the steps of: forming a polysilicon layer(2) on a substrate(1); forming a first tungsten silicide layer(3a) on the polysilicon layer(2) using WF6 gas and mixed gases of SiH4 and SiH2Cl2; and forming a second tungsten silicide layer(3b) on the first tungsten silicide layer(3a) using WF6 and SiH2Cl2 gases. Thereby, it is possible to prevent separation between the polysilicon and the tungsten silicide during annealing process.
Patent KR-0119801-B1 (KR)
Title: Complex magnetic head manufacture method
Inventor: AHN DONG-RAE
IPC: G11B5/127
Filed: 1993-09-28
Granted: 1997-10-27
Abstract: A method of manufacturing a head is disclosed. First, a track processing against an object is performed and a metal layer is processed. A SiO2 is spurted and a track process is performed so as to make a main gap(25) and a pseudo-gap(26). A coating is processed and a surface(B) is etched. Thereafter, the metal layer excluding the surface(B) is spurted, a head is established. Thereby, a ripple noise is reduced.
Patent KR-960009188-B1 (KR)
Title: Apparatus and method for preventing overload of crane
Inventor: KO KWANG-ILL
IPC: B66C13/18
Filed: 1993-09-28
Granted: 1996-07-16
Abstract: The device prevents overload of crane by limiting the maximum load and the maximum speed and displaying the detected load to an operator. The device includes a connecting rod(26) which has a hole for inserting a plate, a dynamometer ring(10), a plate spring(14), a load cell(20), a wire rope(R), a pulley(28), a link(12), an amplifier(22), and microswitches(16-1,16-2,16-3,16-4).
Patent KR-960012024-B1 (KR)
Title: Time controlling apparatus of collecting body
Inventor: JUNG KWEE-SOO
IPC: B01D46/44
Filed: 1993-10-25
Granted: 1996-09-11
Abstract: The apparatus digitizes and automatically regulates the on/off time interval of a solenoid valve in a bag filter of the dust collector. The apparatus comprises: a time controller(100) controlling the on/off time of the solenoid valve of the bag filter; a microprocessor(101) controlling the overall operation of the dust collector based on the on/off time of the solenoid valve; a memory(102) storing the on/off time of the solenoid valve, read by the microprocessor(101), and generating the stored data; a counter(103) counting the on/off time, and generating a control signal based on the counted value; an output circuit(104) including a transistor(TR1), resistors(R1-4), a condenser(C1), a triac(TA1), a photo coupler(PC1) and a filter(F1) to drive the solenoid valve according to the control signals from the microprocessor(101); a displayer(105) displaying the on/off time.
Patent KR-950013312-B1 (KR)
Inventor: PARK JIN-YONG
IPC: B21C37/04
Filed: 1993-11-17
Granted: 1995-11-02
Abstract: 내용 없음.
Patent KR-960015404-B1 (KR)
Title: A process for preparation of maleic anhydride £1,4-14c| as radiolabeled compound
Inventor: KIM YOUNG-SUK
IPC: C07D307/60
Filed: 1993-12-10
Granted: 1996-11-13
Abstract: This invention relates to the compound used in radiolabeled compound wherein the compound comprises maleic anhydride(I) made by : reacting bromoethene(II) with n-buthyl lithium and carbondioxide to be acethylcarboxylate(III); introducing hydrogen into acethylcarboxylate under Lindla's catalyst to make 1,2-ethylenedicarboxylate; and adding P2O5 in that compound. In the formula, *C is 14C.
Patent KR-0179053-B1 (KR)
Title: Indole derivatives
Inventor: MACOR JOHN E
IPC: C07D401/06
Filed: 1991-10-08
Granted: 1999-03-20
Abstract: Compounds of formula (I), wherein n is 0, 1 or 2; R1 is hydrogen; R2 is selected from hydrogen, halogen, cyano, OR4, -(CH2)m-(C=O)NR5R6, -(CH2)m-SO2NR5R6, -(CH2)m-NR7(C=O)R8, -(CH2)m-NR7SO2R8, -(CH2)m-S(O)xR8, -(CH2)m-NR7(C=O)NR5R6, -(CH2)m-NR7(C=O)OR9, and -CH=CH(CH2)yR10; R3 is selected from hydrogen and C1 to C6 linear or branched alkyl; R4 is selected from hydrogen, C1 to C6 alkyl, and aryl; R5 and R6 are independently selected from hydrogen, C1 to C6 alkyl, aryl, and C1 to C3 alkyl-aryl or R5 and R6 taken together to form a 4, 5, or 6 membered ring; R7 and R8 are independently selected from hydrogen, C1 to C6 alkyl, aryl, and C1 to C3 alkyl-aryl; R9 is selected from hydrogen, C1 to C6 alkyl, aryl, and C1 to C3 alkyl-aryl R10 is selected from -(C=O)NR5R6 and -SO2NR5R6, wherein R5 and R6 are defined as above, and -NR7(C=O)R8, -NR7SO2R8, -NR7(C=O)NR5R6, -S(O)xR8 and -NR7(C=O)OR9, wherein R7, R8, and R9 are as defined above; y is 0, 1, or 2; x is 1 or 2; m is 0, 1, 2, or 3; and the above aryl groups and the aryl moieties of the above alkylaryl groups are independently selected from phenyl and substituted phenyl, wherein said substituted phenyl may be substituted with one to three groups selected from C1 to C4 alkyl, halogen, hydroxy, cyano, carboxamido, nitro, and C1 to C4 alkoxy and the pharmaceutically acceptable salts thereof are new. These compounds are useful psychotherapeutics and are potent serotonin (5-HT1) agonists and may be used in the treatment of depression, anxiety, eating disorders, obesity, drug abuse, cluster headache, migraine, pain, chronic paroxysmal hemicrania and headache associated with vascular disorders, and other disorders arising from deficient serotonergic neurotransmission. The compounds can also be used as centrally acting antihypertensives and vasodilators.
Patent KR-960007499-B1 (KR)
Inventor: KAJI TOSHIHIKO
IPC: C21D1/42
Filed: 1992-11-20
Granted: 1996-06-05
Abstract: 내용 없음.
Patent RO-121557-B1 (RO)
Title: Fertilizers with microbial biomass
Inventor: MEGHEA AURELIA
IPC: A01N63/00
Filed: 2004-03-17
Abstract: The present invention relates to fertilizers based on Streptomyces noursei-type microbial biomass resulting from biochemical technologied used in the pharmaceutical industry. According to the invention, the fertilizers contain biologically inactive microbial biomass, synthesis fertilizers of urea and/or ammonium sulphate-type, ammonium phosphate, potassium sulphate and B, Co, Cu, Fe, Mn, Zn-type microelements and are meant to fertilize greenhouse and field vegetable crops.
Patent RO-122824-B1 (RO)
Title: Mixed system for generating heat and domestic hot water
Inventor: MOISESCU ION
IPC: F24D3/08
Filed: 2006-09-14
Abstract: The invention relates to a mixed system for generating heat and domestic hot water meant to be used for equipping buildings and dwellings, especially those located in the areas distant from natural gas supplying networks, with the view of generating domestic hot water and heat. According to the invention, the system comprises a heating boiler and a solar panel, being characterized by the fact that in order to increase the surface of the thermal transfer and implicitly to raise the thermal output, the boiler (C) comprises a central pipe (1) whereon three heating bodies are welded ; two identical bodies, one lower body (4) and one upper body (6) having the shape of a wedge, said bodies being manufactured by the angular welding of two identical rectangular plates (7 and 8) with a closing plate (9), the plates (7 and 8) being provided, on an elliptical surface, with holes (g) for the convective circulation of the heating liquid, and an intermediary heating body (5) carried out by welding two angularly located plates (10 and 11), having the shape of a trapezium, the weld being carried out on the large base side, the small base sides having a symmetrical cutout, partially elliptical, corresponding to the cutout which must be done when the bodies are welded to the surface of the central pipe (1).
Patent RO-123143-B1 (RO)
Title: Process for preparing cellulose-xanthan super-absorbing hydrogels
Inventor: CIOLACU DIANA ELENA
IPC: A61K9/00
Filed: 2008-04-17
Abstract: The invention relates to a process for preparing super-absorbing hydrogels based on cellulose-xanthan, meant to be applied in the pharmaceutical and medical field. According to the invention, the process consists in mixing a cellulose allomorph with xanthan, either unmodified or previously dissolved at low temperatures, down to -30°C, admixing a NaOH and epichlorohydrine solution while stirring continuously, to obtain a paste which is deposited between two glass lamellas and is dried at 80°C for 6 h, followed by washing the resulting hydrogels with distilled water, then with acetone, and finally drying in the vacuum oven, at the ambient temperature.
Patent RO-123441-B1 (RO)
Title: Drum sifter for classifying paper stock pulp
Inventor: BANARIE CRISTIAN
IPC: B07B1/20
Filed: 2009-01-07
Abstract: The invention relates to a drum sifter meant to classify paper stock pulp resulting from packaging corrugated boxboard and recycled paper, by elimination of soft contaminants within the coarse classifying stage. The drum sifter for classifying paper stock pulp consists of the sifter body () wherein some conical orifices () are cut for the evacuation of the classified pulp from the interior of the sifter to the exterior, on the internal surface of the sifter there being provided pulp grinding bars () cooperating with a profiled rotor () placed inside the sifter body (), the classified paper stock pulp being evacuated through the conical orifices () and the contaminants being eliminated through the lower part of the sifter body (). The pulp grinding bars ()arranged on the internal surface of the sifter have a variable curvature along the sifter generatrix, the curvature radii of the grinding bars () in the pulp intake portion being smaller than the curvature radii of the grinding bars () in the portion for eliminating the contaminants contained within the paper stock pulp.
Patent RS-57051-B1 (RS)
Title: Sustainable method and system for cost-effective treatment of water bodies affected by bacteria and microalgae
Inventor: TORRES FERNANDO BENJAMIN FISCHMANN
IPC: E04H4/12
Filed: 2012-03-29
Abstract: Invention herewith described refers to the sustainable method and system for the cost-effective treatment of water bodies affected by bacteria and microalgae in swimming pools used for recreational purposes at low density. The methods and the system disclosed here also use fewer chemicals, but up to 100 times less than the conventional system for the treatment of water in swimming pools. The methods and the system of this invention can be used for the treatment of the water for recreation threatened by bacteria and microalgae and for providing the sustainable methods for obtaining water which meets the bacteriological and physicochemical requirements for the water for recreation, as a state regulatory body such as the Environmental Protection Agency (EPA) prescribed for bathing water at full physical contact.
Patent SA-113340483-B1 (SA)
Title: Flakes of ester mixtures and methods for their production
Inventor: SHANKAR DEVRAJ
Filed: 2013-04-20
Abstract: There is provided flakes of an ester mixture comprising bis-(hydroxyethyl)-terephthalate, dimers, trimers, tetramers, pentamers and higher oligomers of ethane-1,2-diol and terephthalate acid.
Patent SA-113340954-B1 (SA)
Title: Flexible casing guide running tool
Inventor: DUANE THOMAS BLOOM
Filed: 2013-10-23
Abstract: A downhole tool comprising a non-rotating downhole sleeve adapted for open hole drilling and/or casing centralization. The sleeve includes a tubular body made of hard plastic with integrally formed helical blades positioned around its outer surface and an inner surface configuration which allows drilling fluid circulation to form a non-rotating fluid bearing between the sleeve and the drill pipe or casing. The helical blades reduce sliding and rotating torque while drilling, with minimal obstruction to drilling fluid passing through the borehole between the blades. The leading edge of the flexible wellbore casing guide has a curved surface. The length and stiffness of the flexible casing guide distributes the normal casing deflection force thereby reducing the risk of sticking the casing through a curved wellbore section.