baber/WOPTO huggingface dataset:
Patent KR-800001018-B1 (KR)
Title: Defect detection and compensation
Inventor: BAKER A
IPC: H04N5/76
Filed: 1976-03-10
Granted: 1980-09-22
Abstract: A defect detector suitable for use in playback of a video record employing an FM carrier recording format is composed of a zero-crossing detector(20) for developing output pulses indicative of the zero-crossing of the signal developed by the pick up ccts., a monostable multivibrator(25) responsive to the output pulses of the zero-crossing detector, a low pass filter(27) coupled to receive an output of the multivibrator, means for utilizing the output of the low pass filter to control the display of images and means(68) for developing a delayed version of an output pulse of the multivibrator.
Patent KR-800001211-B1 (KR)
Title: Process for manufacturing a permeable backing of shoe leather
Inventor: NOGAWA TAKASHI
IPC: A43B23/16
Filed: 1976-12-08
Granted: 1980-10-22
Abstract: A permeable lining material for shoes was prepd. by scattering on the surface of a cotton, layon, or other textile fabric 30-200g/m2 of thermoplastic resin particles of diam. 0.29-0.84mm., heating the lower side of the fabric with a hot place at 180-220≰C, optionally heating the upper surface with in hemispherical form, and cooling.
Patent KR-810000373-B1 (KR)
Title: Preparation of violet ticl3
Inventor: VAN DER NAT A
IPC: C01G23/02
Filed: 1977-06-24
Granted: 1981-04-24
Abstract: Violet TiCl3 suitable for stereospecific polymn. of propylene is prepd. directly by mixing a soln. of 1:0.3-2 TiCl4-ether complex and a soln. of 1:0.25 Alalkyl-ether complex and heating the mixt. for <=1h at 50-110≰C to give, at least, 0.2 M/l TiCl3 soln.  Thus, a soln. of TiCl4 and Bu2O in PhMe was heated to 90≰C, treated during 7 min with a soln. of Et2AlCl and Bu2O in isooctane, and heated 20 min at 90≰C to give violet TiCl3, which was filtered, washed with isooctane, and dried.
Patent KR-830001505-B1 (KR)
Title: 자성물질의 제조방법
IPC: H01F1/14
Filed: 1980-02-27
Granted: 1983-08-03
Abstract: 내용 없음.
Patent KR-810000208-B1 (KR)
Title: Let-off mechanism for tail yarn of cop
Inventor: PARK JONG DO
IPC: D03D45/50
Filed: 1980-04-01
Granted: 1981-03-12
Abstract: This invention is for the method of abolishing properly tail yarn of cop.  The method is as follows; The cop with tail yarn is passed with short interval with blowing wind from upper part to lower part so that the tail yarn may be loosened and wound on reels which are set in the both sides of lower part.
Patent KR-830001754-B1 (KR)
Title: 압력민감(Pressure-sensitive)복사지의 제조방법
Filed: 1980-08-30
Granted: 1983-09-03
Abstract: 내용 없음
Patent KR-850000475-B1 (KR)
Title: Method of preparing for the glycocyl moranoline derivative
Inventor: MASUMURA SHINGO
IPC: C12R1/66
Filed: 1981-05-23
Granted: 1985-04-08
Abstract: Glucosyl moranoline derivs. of formula (III) are prepd. from moranoline compds. of formula (I), compds. of formula (III) are prepd. from moranoline compds. of formula (I), compds. of formula (III), and α-1,4-glucanglucohydrolase with addn. of an acid cation exchanger. In the formulas, R is H or lower alkyl, and n is 0-20. (III) are used to control blood sugar levels.
Patent KR-860002214-B1 (KR)
Title: Successive frame digital multiplexer with increased channel capacity
Inventor: GRUENBERG ELLIOT
IPC: H04J3/16
Filed: 1982-05-12
Granted: 1986-12-31
Abstract: Information signals in a number of input channels are serially encoded into a sequence of multibit digital words. Encoding circuitry is associated with each input channel and is controlled by timing circuits to order the bit position of each multibit digital word. A predetermined bit in each word is presented at different times to outputs of each encoder. The multibit digital words from each encoder are converted into multibit digital code words. Each bit of each code word is multiplied with a different analogue voltage, these voltage being summed and converted into transmission code words. The code words are then ordered into successive transmission frames.
Patent KR-830000341-B1 (KR)
Title: 세팔로스포린 유도체의 제법
IPC: C07D501/36
Filed: 1982-08-28
Granted: 1983-03-04
Abstract: 내용 없음.
Patent KR-880001488-B1 (KR)
Title: Centrifugal pump
Inventor: YANAGISAWA SIIJI
IPC: F04D29/44
Filed: 1982-08-30
Granted: 1988-08-13
Abstract: The centrifugal water pump includes a pump runner (1) and a casing (3) enclosing an outlet port (5), to form a volute chamber around the runner.  A deflecting wall (11) causes a flux returning along an inner wall surface of the valute chamber toward the outlet port to be deflected, avoiding production of a countercurrent velocity component in the water.  The deflecting wall extends normal to the flow direction of the flow flux.  The deflecting wall can be of tubular form, located on a front or rear shroud in the vicinity of an end face on the outlet port side.
Patent KR-860000560-B1 (KR)
Title: Thermoplastic copolyester elastomers composition
Inventor: SHAIN ALBERT LEOPOLD
IPC: C08L67/00
Filed: 1983-03-04
Granted: 1986-05-14
Abstract: Thermoplastic copolyester elastomer was prepd. from ester copolymer comprising long-chained ester oligomer(Ia and/or Ib) and short- chained ester oligomer (II) connected to ester bond by adding 0.1-10 wt.% alkali metal salt of phenol compd. having equiv. wt. per phenol hydroxy gp. less than 300 and pKa 250 more than 5; where G = divalent radical remained after removal of hydroxy gp. from long-chained glycol; R = divalent radical remained after removal of carboxyl gp. from dicarboxylic acid; R1 = divalent radical remained after removal of carboxyl gp. from dimeric acid; and D = divalent radical remained after removal of hydroxy gp. from aliph. diol.
Patent KR-870001286-B1 (KR)
Title: Device for separating solid particles of dirt from cooling water
Inventor: WERNER BORCHERT
IPC: E02B9/04
Filed: 1983-04-22
Granted: 1987-07-11
Abstract: The device for the sepn. of solid Contaminants from the cooling water of power stations or heat exchangers consists of a vertical cylinder which receives the crude water in the upper part tangentially and has a stationary ring screen in the lower part. A deflector plate which acts as a shield around the screen at the outflow pipe rests at one end on the screen drum and extends with a ring distance from the end over half the screen circumference. This improves the contaminant sepn. efficiency and prevents clogging of the outflow pipe by contaminants.
Patent KR-910000941-B1 (KR)
Inventor: OYAMA MOTOHUMI
IPC: C08L33/00
Filed: 1983-08-22
Granted: 1991-02-19
Abstract: 내용 없음.
Patent KR-870000756-B1 (KR)
Title: Apparatus of venting gas from vacuum distillation of brine
Inventor: TAKADA MASAHARU
IPC: C02F1/04
Filed: 1983-09-23
Granted: 1987-04-15
Abstract: Evacuating vacuum disn. appts. employs a two-stage oillubricated sliding vane pump to remove water vapour and noncondensible gases. Emulsification of the lubricating oil by condensed moisture is prevented by cooling the distn. column over head vapour in a direct- contact heat exchanger, using a proportion of the condenser cooling water, and by a controlled bleed of fresh air into the interstage gas stream in the pump. The method permits use of a type of pump previously restricted in application due to the high water content of the overhead vapour.
Patent KR-850001909-B1 (KR)
Title: Wireless video camera
Inventor: U HO-JE
IPC: H04N5/225
Filed: 1983-12-31
Granted: 1985-12-30
Abstract: The video signal from a video camera and the control signal, transformed to a remote signal, are superposed, and modulated to a high frequency for transmission with the voice signal from the video camera. The transmitted signal is received by the video tape recorder, and begins or terminates recording as prompted by the remote signal.
Patent KR-920007453-B1 (KR)
Inventor: HIGGINS JR ROBERT J
IPC: H03H9/56
Filed: 1984-04-25
Granted: 1992-09-01
Abstract: 내용 없음.
Patent KR-860001028-B1 (KR)
Title: Process for preparing a guanidino thiazole compound
Inventor: CHONAG JAE-GYU
IPC: C07D277/48
Filed: 1984-07-13
Granted: 1986-07-28
Abstract: Guanidino thiazole deriv. of formula (I) was prepd. Thus, 11.8 g amidinothiourea was reacted with a soln. of 6.34g 1.3(CH2Cl)2CO in 75 ml of EtOH at 40 - 50≰C. The resulting ppts. were filtered, washed with Me2CO, and dried to give 14.7g S-(2guanidino-4-hiazoylmethyl)- amidinothiourea HCl. (I) inhibits secretion of acid in the stomach.
Patent KR-890001469-B1 (KR)
Title: Switch
Inventor: DOMIZU MODOYUKKI
IPC: H01H13/12
Filed: 1984-08-16
Granted: 1989-05-04
Abstract: The switch includes a casing (1), a pair of fixed contacts (8,9) disposed in the casing to confront each other, and a movable contact (35) mounted to an intermediate portion of a plunger (30) in a direction intersecting with the fixed contacts.  Each contact is formed by cutting a rod member into a predetermined length. The plunger is slidably accommodated in the casing for movement in an axial direction, and bearing members (36,37) slidably support the plunger.  A return spring (38) is directed around the outer periphery of the plunger.  The movable contact is restored together with the plunger to close the pair of fixed contacts in a free state.
Patent KR-870001159-B1 (KR)
Title: Process for preparing pyrazole-ring alkylated pyrazoloquinolines
Inventor: SCHAUS JOHN M
IPC: A61K31/435
Filed: 1984-08-24
Granted: 1987-06-13
Abstract: Pyrazole-ring alkylated pyrazoloquinolines[mixt. of trans-(±) - tautomer, of formula (I) and (II)  and its pharmaceutically acceptable acid addn. salts are prepd. by reacting (III) with NH2NH2.  R=H, CN, C1-3 alkyl or allyl; R1=C1-3 alkyl; R2=C1-3 alkyl, allyl or CN.  Prepg. tautomerisms are useful for treatment of hypertension, and esp. are tautomeric trans-(±)-alkylatedoctahydropyrazolo [3,4-g  and [3,4-f  quinoline e.g. trans-(±) -1-methyl-6-n-propyl- 4,5,5a,6,7,8,9,9a-octahydro-2H(and 3H)pyrazolo[4,3-f quinoline.
Patent KR-890001456-B1 (KR)
Title: Letter modulating system
Inventor: KOHCHIYAMA HUMIYAS
IPC: G06F17/28
Filed: 1984-09-14
Granted: 1989-05-03
Abstract: The method allows to convert Hangul(Korean letters) into Chinese characters.  When Hangul characters are inputted, this conversion device searches its lexicon for appropriate Chinese characters using the following procedure.  The hardware consists of an initial phoneme, a medial vowel, and a final phoneme.  The lexicon memory device memorizes the above positions, and searches for appropriate chinese characters after discriminating among the initial, medial, and final phonemes, according to the plural number of Hangul information inputted in serial order.
Patent KR-900000428-B1 (KR)
Title: Process for producing plate barium ferrite particles or magnetics recording
Inventor: NAGAI NORIMICHI
IPC: C01G51/00
Filed: 1984-10-31
Granted: 1990-01-30
Abstract: Plate like Ba ferrite particles for magnetic recording, having coercive force (HC) 500-1000Oe, are represented by BaF12-x -yMxTiyO19  where x and y are independently up to 1.2; M=Co(II), optimized with Zn(II) or Mn (II).  The particles are prepared by (a) adding an Si(IV) cpd. to a highly alkaline aq. suspension of Fe(OH)3  contg. Ti(IV), Ba(II), Co(II) and opt. Zn(II) or Mn(II), so that atomic ratio Si:Fe=0.0025-0.036; (b) autoclaving at 200-330 ≰C to form plate- like particles whose thickness is controlled by the Si:Fe atomic ratio; and pref. (c) heat treating at up to 900 ≰C to improve the magnetization of the particles.
Patent KR-870001788-B1 (KR)
Title: Interphone circuit
Inventor: SHIM BYONG-GON
IPC: H04M1/60
Filed: 1985-05-25
Granted: 1987-10-10
Abstract: This invention is concerned with the interphone circuit provided on an equipment which employs a microprocessor.  According to the invention the interphone may be used with the microprocessor simultaneously.  Buttom switch matrix (60) includes calling and receiving switch and it is connected to the CPU(10). The transmitting and receiving circuit(40) transmits or receives the signal from the calling signal of the calling switch or phone from the outside. Control circuit part(30) interfaces between the CPU and transmitting /receiving circuit.  For using the phone in spite of the on-off state in the existing systems the micro processor under the control may be booted.
Patent KR-890000316-B1 (KR)
Title: Motion transmitting remot control assembly
Inventor: SPEASE ARTHUR L
IPC: F16C1/22
Filed: 1985-08-07
Granted: 1989-03-14
Abstract: This invention is a motion transmitting remote control assembly which transmits forces along a curved path.  This assembly comprises a support connected to a support bracket, a conduit in a slider which is movable in a passageway going through the support, and a L-shape latch having an aperture in one leg through which the slider passes. The latch has a triangular tooth, in the bottom of aperture, which is engaged with teeth of the slider.  The latch is biased by a coil spring which coils around a temperature-responsive member.  A flexible core element passing through the conduit transmits the motion.
Patent KR-920008533-B1 (KR)
Inventor: HRUSRA LOUIS W
IPC: C25B13/04
Filed: 1985-09-30
Granted: 1992-10-01
Abstract: 내용 없음.
Patent KR-860000193-B1 (KR)
Title: Blackboard eraser
Inventor: LEE SUNG-JE
IPC: B43L1/04
Filed: 1985-12-28
Granted: 1986-03-03
Abstract: A blackboard which does not emit fine dust particles is manufactured by coating the surface of a blackboard or plywood board with a redin composition comprising 30 vol.% of 1 : 1 black and green pigment mixture, 10 vol.% of 7 : 3 thinner and DDP oil mixture, 20 vol.% of lusterless lacquer and varnish mixture, 10 vol.% of enamel, 20 vol.% of FRP, and 10 vol.% of fusel oil. The blackboard has a hydrophobic, lusterless, flat surface.
Patent KR-940004799-B1 (KR)
Title: Method and apparatus for extruding a fastening profile onto a travelling film
Inventor: BEYER CARLTON E
IPC: B31B1/90
Filed: 1986-07-09
Granted: 1994-06-01
Abstract: A method and apparatus are provided for securing a plastic fastening profile, such as is used on reclosable plastic containers, to a traveling plastic film web. A freshly extruded hot fastener profile (30) is guided into convergence with a preformed traveling film web (10). The profile and web are joined together in an area (32) in which the web is insulated. Only the heat from the fastener profile is used to fuse the surface of the web and secure the profile to the web.
Patent KR-940005305-B1 (KR)
Title: Catheter
Inventor: NILSSON LEIF
IPC: A61M25/00
Filed: 1986-07-14
Granted: 1994-06-16
Abstract: A catheter intended for insertion into a canal or canal-­like organ, for example into the urethra leading to the urinal bladder of a human being, for the purpose of emptying the contents of the urinal bladder of that person into the catheter. The catheter comprises a preferably flexible, tubular catheter body (10) incor­porating a urine inlet and provided with an insertion section (11) together with means for holding the cathe­ter within the urethra. The catheter body (10) also includes a discharge section (12) spaced from the inser­tion section (11) and intended, for example, for connec­tion to a urine collecting vessel.According to the invention the interior of the tubular insertion section (11) is arranged to support a sieve or filter element (14), and means (13,13',18) for creating turbulence in the incoming flow to the catheter body, so as to prevent blocking of the inlet opening.
Patent KR-910008941-B1 (KR)
Inventor: DAKEUSHI ASUSI
IPC: H03K5/13
Filed: 1987-01-16
Granted: 1991-10-26
Abstract: 내용 없음.
Patent KR-950009756-B1 (KR)
Inventor: MAWATARI MASAAKI
IPC: C08L79/08
Filed: 1987-03-27
Granted: 1995-08-28
Abstract: 내용 없음.
Patent KR-890004314-B1 (KR)
Title: D/a convertor for electronic oven
Inventor: SON YONG-HO
IPC: H03M1/12
Filed: 1987-05-30
Granted: 1989-10-30
Abstract: The converter accomplishes the reduction of EMI noises in a microwave oven by leveling the analog output signals converted from the digital signals of a microprocessor.  The inverter (13) receives the digital signals generated by the microprocessor (11) via the opto-coupler (12) and drives both the integrator (14) and the reset circuit (15). The signal of the delay circuit (18) which is introduced to reduce the instantaneous current variations feeds the adder circuit (21) producing the analog signals for the oven.
Patent KR-900006461-B1 (KR)
Title: Arrester
Inventor: TAKAKI KUNIHIKO
IPC: H01C7/12
Filed: 1987-09-07
Granted: 1990-08-31
Abstract: The arrester includes a characteristic member having two ends, and discharging electricity only when a voltage higher then a predetermined value is imposed between the ends. Th first end of the characteristic member is connected to the electrode, and a device is positioned entirely outside of the container for selectivley electrically connecting or disconnecting the second end of the characteristic member with a ground voltage located outside of the container. An insulation tube encloses the characteristic member and is filled with a gas. The tube is arranged so that the first end is inserted in the container and the second end projects in the atmosphere. The insulation fluid is sealed in the container outside the tube.
Patent KR-950008283-B1 (KR)
Inventor: FLYNN RICHARD M
IPC: C07C315/04
Filed: 1987-09-10
Granted: 1995-07-27
Abstract: 내용 없음.
Patent KR-960007435-B1 (KR)
Title: Pipe coupling
Inventor: MUEFFKE WALTER
IPC: B60T11/10
Filed: 1987-11-10
Granted: 1996-05-31
Abstract: A pipe connection for thin-walled, small-diameter metal pipes, in particular for braking lines, for fuel lines, and for hydraulic lines for motor vehicles, is provided with a sleeve (3) into which is sealingly set at least one first conically flared metal pipe (1) (so-called flare according to ISO 4038) in a bore cone (25) under the compression force of a tensioning body (8, respectively, 9) resting against the flare (23). In order to provide a pipe connection without screw parts and taking into account the narrow assembly or mounting quarters and in order to achieve a satisfactory sealing effect for the full duration of the operation of the connection, it is proposed to employ a sleeve (12) with an axially fixed annular channel (18). A radially partially thin-walled pressure bushing (15) is shifted onto the first metal pipe (1) up to resting at the flare (23). The pressure force of the flare (23) against the sealing seat (14) in axial direction is generated by a set deformation zone (20) of the pressure bushing (15), where the thin wall (21) is deformable into the axially fixed annular channel (18) of the sleeve (12) by an axial upsetting of the pressure bushing (15) into the sleeve (12).
Patent KR-950008764-B1 (KR)
Inventor: UEKAMA KANETO
IPC: A61K47/48
Filed: 1987-12-26
Granted: 1995-08-08
Abstract: 내용 없음.
Patent KR-930005512-B1 (KR)
Inventor: YAMADA MITSUO
IPC: C08G59/40
Filed: 1988-01-30
Granted: 1993-06-22
Abstract: 내용 없음.
Patent KR-910007284-B1 (KR)
Inventor: HIRATA TOICHI
IPC: G05B19/40
Filed: 1988-03-26
Granted: 1991-09-24
Abstract: 내용 없음.
Patent KR-910006088-B1 (KR)
Title: Manufacturing method of semiconductor with high resistance film
Inventor: OH YUNG-SUN
IPC: H01L21/22
Filed: 1988-04-20
Granted: 1991-08-12
Abstract: The method for forming high  resistance  film  comprises  the following  steps;  depositing  resistance  film  on  semiconductor substrate; annealing after ion implantation an impurity  at  oxide layer  grown  on  resistance  film;  forming  a  pattern  of  high resistance  film;  ion  implanting  an  impurity  to  form  a  low resistance region; depositing a low  temperature  oxide  film  and boro phospho silicate glass (DPSG) in turn; forming a  metal  film at contact area of low resistance film.
Patent KR-930002010-B1 (KR)
Inventor: ISHII YOICHI
IPC: A61K35/56
Filed: 1988-06-14
Granted: 1993-03-20
Abstract: 내용 없음.
Patent KR-950013916-B1 (KR)
Title: Softening detergent compositions containing hectrorite clays
Inventor: BAECK ANDRE
IPC: C11D3/12
Filed: 1988-06-30
Granted: 1995-11-18
Abstract: Detergent compositions are disclosed which comprise, as a fabric softening ingredient, a fabric softening clay. The fabric softening clay is a hectorite of natural origin, having a layer change distribution such that at least 50% is in the range 0. 23-0. 31 The specified clays have excellent deposition and fabric softening properties.
Patent KR-910008829-B1 (KR)
Title: Rapid alloying process for low resistance omic contact
Inventor: LEE JIN-KU
IPC: H01L21/28
Filed: 1988-08-12
Granted: 1991-10-21
Abstract: The methof is  used  for  manufacturing  integrated  circuits requiring GaAs material. The rapid alloying is performed during 20 sec in 450 degree C, as compound gas mixed with N2 and H2 of 90 vs 10 ratio, flows at the speed of  2  l/min  continuously.  In  this condition, the method offers reduction of the processing  time  in manufacturing integrated circuit.
Patent KR-960004877-B1 (KR)
Title: Process for the purification of crude sec butyl alcohol by distillation
Inventor: OSTERBERG GUENTHER
IPC: C07C29/82
Filed: 1988-08-26
Granted: 1996-04-16
Abstract: Crude, virtually anhydrous sec-butyl alcohol, prepared by catalytic direct hydration of n-butenes is freed from the by-products which can be distilled azeotropically and are highly volatile by continuous azeotropic distillation in a separation column by means of water, the pre-purified sec-butyl alcohol which is obtained in anhydrous form is removed and the high-boiling by-products are then separated off in a separate column. 
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Patent KR-960001044-B1 (KR)
Title: Data transmission method of data switch
Inventor: KANG SUNG-BONG
IPC: H04L12/20
Filed: 1988-08-31
Granted: 1996-01-17
Abstract: the first procedure which outputs received data imputing from a transmitting side-data server to A port when data outputting through B port to switching circuit simultaneously as storing the received data to the memory; the second procedure which stores received data to the memory through the switching circuit when data receiving at B port; the third procedure which outputs stored data to a connected line side-data server through A port; the fourth procedure which controls data flow by inspecting the data receiving for cutting require when not executing the first, second and the third procedure.
Patent KR-920005960-B1 (KR)
Title: Red-fluorescent substance
Inventor: CHONG CHWA-YONG
IPC: C09K11/77
Filed: 1988-12-26
Granted: 1992-07-25
Abstract: The red pigment-coated fluorescent material  is  produced  by mixing ZnO with Fe2O3 [mixing wt. ratio = 1:9 , firing the mixture at 600 deg.C to obtain a red pigment of xZnOyFe2O3 [x/y <= 0.84 , adding 100 wt. pts. of Y2O2S:Eu to 0.3 % gellatin soln. to  obtain a fluorescent dispersed soln. (A),  mixing  0.3  wt.  pt.  of  the pigment with 0.3 % gum arabic soln. to obtain a pigment  dispersed soln (B), mixing the soln. (A) with the soln. (B),  adding  1  wt. pt. of formalin to the mixed soln., and washing and drying it. The fluorescent material is used in the mfr. of a fluorescent screen.
Patent KR-920000095-B1 (KR)
Title: Method of displaying time for a telephone call
Inventor: KIM SUK-JUN
IPC: H04M15/28
Filed: 1988-12-31
Granted: 1992-01-06
Abstract: The amount of time used by a keyphone subsciber, is displayed when the called replies.  The  system  includes  a  CPU  (10)  for controlling the system,  ROM  (20)  for  storing  program  of  the keyphone system, a RAM (20) for storing program  of  the  keyphone system, a  keyphone  subsciber  circuit  (40)  for  interfacing  a keyphone (2) and the CPU (10), and a keyphone (2) having a  liquid crystal display. The program stored in the ROM  (20)  comprises  a timer program (100) for checking the time by 100 ms from th  start time of the timer  and  for  sending  time  data  to  an  exchange program, a systemcontrol program (200) for  controlling  the  hole program of  the  system,   signal  processing  program  (300)  for sending data to keyphone through the  keyphone  subsciber  circuit (300), and an exchange program (400) for displaying the amount  of time.
Patent KR-960011270-B1 (KR)
Inventor: HIRAI MIKIO
IPC: C08L69/00
Filed: 1988-01-29
Granted: 1996-08-21
Abstract: 내용 없음.
Patent KR-920008202-B1 (KR)
Inventor: TANAKA HIROSHI
IPC: F25D21/14
Filed: 1989-01-20
Granted: 1992-09-25
Abstract: 내용 없음.
Patent KR-930000292-B1 (KR)
Inventor: NOMURA TAKEHIKO
IPC: G03F7/20
Filed: 1989-02-08
Granted: 1993-01-15
Abstract: 내용 없음.