baber/WOPTO huggingface dataset:
Patent KR-880000760-B1 (KR)
Title: Process for the preparation of quinone derivatives
Inventor: MASAJEUMI WADANABE
IPC: C07C50/28
Filed: 1982-02-09
Granted: 1988-05-06
Abstract: A compound of the formula 
<CHEM>
 wherein R stands for an alkyl group having 1 to 22 carbon atoms and having at its terminal end a hydroxyl group which may be protected can be obtained with an industrial advantage by allowing a compound representable by the formula; 
<CHEM>
 to react with a peroxide of a carboxylic acid representable by the formula;
 RCOOH
 wherein R is of the same meaning as defined above, or with a peroxide of an acid anhydride of the carboxylic acid. 
<??>A compound of the formula; 
<CHEM>
 wherein R<2> stands for an alkyl group having 1 to 2 carbon atoms and having at its terminal end an optionally protected hydroxyl group, is a novel compound and has antifibrotic activity.
Patent KR-890001812-B1 (KR)
Title: Digital color television signal demodulator
Inventor: LEWIS HENRY G JR
IPC: H04N11/04
Filed: 1982-08-31
Granted: 1989-05-23
Abstract: The analogue signal from a receiving antenna is processed by a conventional tuner, IF circuits and a video detector.  An A/D converter samples the detector output at four times the colour sub- carrier frequency, under the control of the clock generator. The digitised video signal is divided by a comb filter into luminance and chrominance components.  The luminance processor responds to the viewer's contrast control and is followed by a D/A converter and low- pass filter.  The chrominance amplifier responds to the colour saturation control and is followed by a digital peak differentiator and demodulator.
Patent KR-860000931-B1 (KR)
Title: Process for preparing anti ulcer 2-guanidino-4-(2-substituted-amino-4-imidazolil)-thiazoles
Inventor: LAMATTINA JOHN LAWRENCE
IPC: C07D417/14
Filed: 1983-05-09
Granted: 1986-07-19
Abstract: New pharmaceutically active cpds. have formula (I), (R is NHR' or NR2; R' is 7 - 12C alkyl, 6 - 11C pyridylalkyl or 11 12C Ph-alkyl possibly mono- or disubstd. on the Ph with F, Cl, Br, 1 - 3C alkoxy or CF3; each R can independently be 1 - 12C alkyl or 7 - 12C Ph-alkyl opt. substd. on the Ph with F, Cl, Br, 1 - 3C alkyl or alkoxy or CF3; the 2R together with the N can form a pyrrolidone, piperidine, perhydro-1H-azepine or morpholine ring). (I) has an antisecretary action and can be used to prevent or treat gastric ulcers.
Patent KR-880000667-B1 (KR)
Title: Apparatus for lignt divergence
Inventor: MORI KEI
IPC: G02B6/00
Filed: 1983-10-21
Granted: 1988-04-20
Abstract: This invention is concerned with the photo-divergent device. The device can classify the light which is transmitted in the first photoconductor (1) of cylindrical type into the second photoconductor (2).  The sun light (L) is collected in the first photoconductor (1) through a lens.  The sun light (L) reflects repeatedly in the surface of the photoconductor (1) and is transmitted in the photoconductor. If the photoconductor (1) is established in the case (4), the photoconductor is protected and supported by the case.  Therefore the light can be classified effectively by a new and simple construction.
Patent KR-850001287-B1 (KR)
Title: Method for the preparation of polyacrylate sanitary tool
Inventor: KWON PYONG-CHAE
IPC: B32B27/28
Filed: 1983-12-28
Granted: 1985-09-09
Abstract: A sanitary product is prepared from a copolymer of 75-95 parts of methyl methacrylate, 5-25 parts of ethylacrylate, and less than 1 mole % peroxide such as benzoic peroxide or di-tertbutyl peroxide, through solidification for 15-30 hrs. at 75-85≰C. It is then molded to have concavo-convex rear surface. Adhesion with unsaturated polyester such as di(2-ethylhexyl) phthalate, di-n-octyl phthalate, dinonyl phthalate,  di(2-ethylhexyl) adipate, dibutyl phthalate, or their mixture, attaches a networked glass-fiber cloth, and the tool is coated  with unsaturated polyester.
Patent KR-860000586-B1 (KR)
Title: Process for preparing triazione derivates
Inventor: KIM WAN-ZU
IPC: C07D253/06
Filed: 1984-02-22
Granted: 1986-05-17
Abstract: Triazine deriv. (I) used as an antibiotic was prepd. from alkyl alkoxalyl; thiosemicarbazide(VII) by ring formation with alkali and sepn. with cation-exchange resin. (VII) is prepd. by reacting alkyl thiosemicarbazide(II) having formula NH2-NR1-CS-NHR2 and alkoxalyl halide (IV) having formula R3OCO-CO-X; where R1, R2 = H or C1-4 lower hydrocarbon; R3 = lower alkyl gp.; and X = halogen.
Patent KR-900005133-B1 (KR)
Title: Process for preparing aryloxy-n (aminoalkyl)-1-pyrrolidine and prperidine carboxamides and carbothioamides
Inventor: MATHUR PERSHOTTAM P
IPC: A61K31/395
Filed: 1984-05-10
Granted: 1990-07-20
Abstract: A cpd. of formula (I) and their acid addn. salts are prepd. by reacting a cpd. of formula (II) with a cpd. of formula HNR (CH2) pNR1R2. In the formulas, Ar = 1-naphthyl, 2-naphthyl, 2,3dihydro-1H- inden-5-yl or phenyl opt. substd. by C1-8 alkyl or alkoxy, halogen or CF3; m, n = 1 or 2; P= 1-4; R = H or C1-3 alkyl; R1 and R2 each = H, C1-8 alkyl, phenyl, C7-9 phenylalkyl or C3-8  cycloalkyl; X= O or S. (I) have anti-arrythmic activity and are used at dosage 1-100 mg/kg in controlling cardiac arrythmia.
Patent KR-910004328-B1 (KR)
Title: Medical administration devices
Inventor: NEWELL ROBERT E
IPC: A61M15/00
Filed: 1984-05-23
Granted: 1991-06-26
Abstract: A medical administration device comprises a body (1) with a chamber (2) which is arranged to receive a blister pack (4) with a container (5) for medicament. The chamber is normally closed by a cover (7) which may be opened to permit a container to be inserted and located in the chamber. A mouthpiece (9) communicates with the chamber and a patient may inhale through it. The chamber has an air inlet (11). A spike (12) is engageable with a container in the chamber when the cover is closed to open a container located in the chamber so as to permit medicament to be withdrawn from the container when the patient inhales.
Patent KR-910007050-B1 (KR)
Inventor: COOKE BUTUS M
IPC: G21D3/04
Filed: 1984-10-27
Granted: 1991-09-16
Abstract: 내용 없음.
Patent KR-910003339-B1 (KR)
Inventor: DOMISAEA KAZUYUKI
IPC: C07C327/22
Filed: 1984-11-12
Granted: 1991-05-27
Abstract: 내용 없음.
Patent KR-890004789-B1 (KR)
Title: Method of forming a chemical phosphate coating on the surface of steel
Inventor: MATSUDA SIGEKI
IPC: C23C22/13
Filed: 1985-04-24
Granted: 1989-11-27
Abstract: A phosphating process employs an acidic phosphating solution containing metal ions, oxo acid ions and phosphoric acid ions to which alkali is added for in situ generation of oxidising agent including nitrite ions by the oxo acid, the solution having a temperature of max. 40 deg.C, a PH of 2.5-4.5 and a redox potential of 150-550 mV.  The process is useful in the zinc phosphating of steel.  Phosphating can be carried out at ambient temperature under automatic control, without direct addition of oxidising agent to the bath.  The bath is stable, phosphating reaction occurs only at the steel surface, and H2 gas and sludge formation are reduced.
Patent KR-900000283-B1 (KR)
Title: Manufacturing method of zn-ni alloy plated steel strips
Inventor: MATSUSITA AKIRA
IPC: C25D3/56
Filed: 1985-04-25
Granted: 1990-01-24
Abstract: Zn-Ni alloy electroplated steel strip is produced by passing a steel strip through a chloride plating bath contg. soluble Zn and Ni anodes.  The bath contains major proportions of ZnCl2 and NiCl2  in a Ni/(Zn+Ni) ratio of 0.08-0.20 and a total mojor amount of Zn+Ni of 1- 4 mol/l together with 6mol/1KCl and a mol/1NH4Cl such as to satisfy the formula 4.0a/4.7+4.0<= b<= -5.4a/7.1+5.4. The current distribution of this to the anodes is controlled to satisfy that IZn:INi =(100-x)/ 100≰CZn/3Zn: x/100≰CNi/3Ni where IZn=current (amp) fed to Zn anode ; INi =current (amp) fed to Ni anode ; x=%Ni in plated deposite ; CZn=electrochemical equivalent of Zn=0.34mg/C ; CNi=electrochemical equivalent of Ni=0.30mg/C.
Patent KR-920005087-B1 (KR)
Inventor: LEYENDECKER WILLIAM R
IPC: C07C253/10
Filed: 1985-04-29
Granted: 1992-06-26
Abstract: 내용 없음.
Patent KR-880002384-B1 (KR)
Title: A guide board
Inventor: LEE JONG-BAE
IPC: G09F25/00
Filed: 1985-05-10
Granted: 1988-11-03
Abstract: This invention is an electronic multiple-purpose guide machine.  The device guides by display lamp in such places as hotels, sport complexes, and road lines of bus or the subway.  The AC source which is supplied to the primary part of transformer (1) through plug (PG) is connected to the fluroescent light lamp (3) through sensitization relay (2).  The time relay (4) which is connected to the secondary part is linked with the switch relay (6) through the selective switch (5).  The display lamp (10) can be replaced with the light emitted diode (LED) or liquid crystal.
Patent KR-890004634-B1 (KR)
Title: Method for producing hydraulic cements
Inventor: MEYNARDY GUY
IPC: C04B7/36
Filed: 1985-06-25
Granted: 1989-11-21
Abstract: Hydraulic cements are produced by combining a clay phase with calcium carbonate  and then heating to 700-900 deg.C in the presence of a carbon dioxide atmosphere to prevent dissociation of calcium carbonate, to activate the clay phase by dehydroxylation (pozzolanic activation) and reaction with the calcium carbonate, mixing 95% of this material with an activating material e.g. conventional cement clinker.  The process needs less energy and reduces environmental pollution.
Patent KR-930008241-B1 (KR)
Inventor: FERRARI HARRY M
IPC: G21C7/22
Filed: 1985-08-06
Granted: 1993-08-27
Abstract: 내용 없음.
Patent KR-900001802-B1 (KR)
Title: Flop-flip circuit
Inventor: MAGOME KOICHI
IPC: H03K3/356
Filed: 1986-07-15
Granted: 1990-03-24
Abstract: The circuit has a power terminal set at 5V.  A latch section changes one of two output terminals to 5V and discharges the other to zero volt in accordance with an input signal.  Two MOS transistors are provided.  The first transistor has a current path connected between the power and the output terminals.  A second transistor changes the gate of the first while the potential of the second output terminal is changed from 5V to OV.  A capacitor bootstraps the gate potential of the first MOS transistor to turn it on.  The circuit further comprises a third MOS transistor having a current path connected between the gate of the first MOS transistor and the first output terminal.
Patent KR-900001636-B1 (KR)
Title: Assembly for canstituting a stepless speed change gear of friction-drive type
Inventor: SAKAI JIRO
IPC: F16H15/52
Filed: 1986-07-18
Granted: 1990-03-17
Abstract: The input disc (3) is a frictional contact with a groove in a set of rollers (1).  The rollers also drive an output disc (4) and have an outer conical surface.  Axial compression is maintained by a cam-type thrust unit (5) againt a circlip (11).  The whole assembly is maintained by an outer ring (2) which is repositioned axially by the speed charge mechanism.  The input disc is connected to a prime mover and the whole assembly is supported on the output shaft (9).
Patent KR-930006554-B1 (KR)
Title: Multifunction remote control apparatus
Inventor: KIM KYONG-SOP
IPC: H04Q9/00
Filed: 1986-10-31
Granted: 1993-07-16
Abstract: The remote controller equipped with a microprocessor and a display controls a number of home video appliances.  The remote controller includes a memory (1) having program, a microprocessor (2) for reading data stored in the memory according to a touch coordinate signal (X,Y), an encoder (3) for encoding data read from the memory, a video signal generator (4) for generating video signal according to output signal of the encoder (3), an infra-red signal transmitter (5) for transmitting infra-red signal to an object according to signal coded by the encoder, a display (6) for displaying buttom image of corresponding function according to video signal transmitted from the video signal generator (4) when touch coordinate signal is detected, and an analog to digital converter (7) for converting output signal of a touch corodinate into digital signal.
Patent KR-940003085-B1 (KR)
Inventor: EKLUND ROLENCE M
IPC: H04H20/88
Filed: 1986-11-13
Granted: 1994-04-13
Abstract: 내용 없음.
Patent KR-890004062-B1 (KR)
Title: Integral circuits for separating digital signals from complete video signals
Inventor: SHIN MYONG-CHUL
IPC: H04N5/04
Filed: 1986-11-15
Granted: 1989-10-18
Abstract: The integrated circuit separates the digital information signal and digital synchronous signal in a data-paket of letterbroadcasting. The circuit minimizes the effects of voltage and temperature and speeds up a switching velocity of output.  The circuit includes a buffer circuit amplifying input signal, an active filter (2) eliminating high frequency components of input signal, a sampling circuit (3), a memory circuit (4) memorizing output voltage of the sampling circuit, an impedance buffer (5), a comparator (6), the first driver circuit (7), an amplifier (8), a resonant circuit (9), a comparation voltage generator (10), the second driver (12) and a voltage supplier.
Patent KR-910001073-B1 (KR)
Title: A automatic dish washer
Inventor: KIM SANG-KWON
IPC: A47L15/42
Filed: 1986-12-31
Granted: 1991-02-23
Abstract: The dish washer operating the process with  a  microprocessor includes a sensor (4) detecting the temperature of  the  supplying water and the inner chamber  of  the  dish  washer,  which  sensed signal  is  converted  to  the  digital  one  to  provide  to  the microprocessor (1). The method comprises  a  washing  process  for cleaming the dish with the water keeping  certain  temperature,  a rinse process for rinsing the dish with cold water after  draining the dirty water, a rinse process for rinsing the  dish  with  warm water after draining the rinsed cold  water  and  resupplying  the fresh warm water, and a drying process for drying  the  dish  with hot air heated by a heater (H).
Patent KR-900000516-B1 (KR)
Inventor: STAHLBUSH JAMES R
IPC: C08F8/32
Filed: 1985-12-13
Granted: 1990-01-31
Abstract: 내용 없음.
Patent KR-900007280-B1 (KR)
Title: Telephone control system
Inventor: NAKATZGAWA NORIHIKO
IPC: H04M11/00
Filed: 1987-02-28
Granted: 1990-10-06
Abstract: The telephone controller for home appliances over telephone line; comprises an arrival detecting circuit (10) for detecting a calling signal from a telephone line (1); a counting circuit (11) for counting the detecting number of the arrival detecting circuit and control means (6) for executing the control according to the inputting instructions if a counting value of the counting circuit reaches a setting value (N1) under setting of absent mode or if the counting value reaches a setting value (N2) greater than the setting value (N1) under setting of non-absent mode.
Patent KR-950005219-B1 (KR)
Title: Tilt apparatus for crt
Inventor: KILLIAN JR JOHN C
IPC: F16M11/10
Filed: 1987-05-12
Granted: 1995-05-22
Abstract: An apparatus provides a user-adjustable viewing angle for a cathode ray tube (CRT) display. The CRT may be rotated in either of two directions by depressing a control bar located along the front bezel of the display. Once set to the desired position, the control bar is released and the CRT is inhibited from rotating in both directions. Thus, the CRT may be locked in a variety of positions to suit the particular user or environmental conditions.
Patent KR-960009433-B1 (KR)
Inventor: COATES IAN HAROLD
IPC: A61K/
Filed: 1987-11-27
Granted: 1996-07-19
Abstract: 내용없음.
Patent KR-910000049-B1 (KR)
Title: Adhesive for metal album
Inventor: KIM YONG-CHOL
IPC: C09J101/02
Filed: 1987-12-18
Granted: 1991-01-19
Abstract: The adhesive for  metal  album  comprises  (A)  component  of celluloid or cellulose and (B) compoment of acrylate  in  the  wt. ratio of 25-35: 75-65. (A) component is prepd. by  dissolving  the celluloid or cellulose deriv. in org.  solvent;  then  adding  the small amt.  of  antioxidant  and  viscosity  enhancing  agent  and stirring and reacting the product; and then reacting  the  product with acrylate polymer. (B) component is  prepd.  by  admixing  and heat-reacting drying oil with rosin cpd.; then cooling; and adding org. dicarboxylic acid or anhydride thereof to  acidify  to  4.5-5 pH; then emulsifying by  adding  the  cooling  water;  adding  and reacting the acrylate polymer therein.
Patent KR-930005070-B1 (KR)
Inventor: JOHNSON ALAN
IPC: C22B1/10
Filed: 1987-12-24
Granted: 1993-06-15
Abstract: 내용 없음.
Patent KR-920001319-B1 (KR)
Title: Solid catalyst for olefin polymerization
Inventor: TSUTSUI TOSHIYUKI
IPC: C08F4/6592
Filed: 1988-05-13
Granted: 1992-02-10
Abstract: A solid catalyst for polymerizing an olefin is prepared from an organometallic compound, a fine-particle carrier, an aluminoxane, a compound of group IVB transition metal in periodic table, and an olefin polymer produced in a preliminary polymerization. The catalyst has a high polymerization activity and is capable of producing an olefin polymer having a narrow molecular-weight distribution. When the catalyst is used for producing an olefin copolymer, the resulting copolymer has both narrow molecular-weight distribution and composition distribution.
Patent KR-910005824-B1 (KR)
Title: Protocol dump list print method for fax
Inventor: KIM HAK-SOO
IPC: H04N1/32
Filed: 1988-05-31
Granted: 1991-08-03
Abstract: The method prints out the protocol  in  case  of  need  after storing  each  protocol  process  in  the  memory  so   that   the communication states of the line are recognised easily. The method comprises steps; (a) sending/receiving the protocol data in  terms of frame in the communication mode; (b) storing the protocol  data sequentially in  the  memory  and  waiting  after  completing  the communication; and (c) printing out the stored  protocol  data  in terms of frame when the command for print is generated in the wait state.
Patent KR-940004502-B1 (KR)
Title: Tape counter apparatus & method with osd
Inventor: KIM HYON-U
IPC: G11B15/03
Filed: 1988-10-31
Granted: 1994-05-25
Abstract: The counter is for marking a starting point of a tape and for displaying the count data on a screen. The counter comprises an option switch (S) for selecting start or end time counting, a reel pulse checker (RP) for checking reel pulse generated according to rotation of a reel, a sync. detector (D) for detecting television synchronous signal, a microcomputer for calculating reel counting data, an on-screen display (O) for generating character data according to the reel counting data, and a recording head (RH) for recording the OSD signal on a tape.
Patent KR-970001267-B1 (KR)
Title: Compliant layer
Inventor: DWIVEDI RATNESH K
IPC: B22D19/00
Filed: 1988-11-02
Granted: 1997-02-04
Abstract: This invention relates to a new ceramic-metal composite body and a method for producing the same. Particularly, a compliant layer composition is utilized for preventing the rupture of a ceramic article (1) and/or the yielding or failure of a metal during the pouring, solidification and cooling of a molten metal which has been cast around the ceramic. A slurry composition for the compliant layer (2) includes plaster of paris, a liquid vehicle and a filler material. The slurry composition is coated on the ceramic article (1) and thereafter is heat-treated to form a compliant layer (2). Ceramic-metal composite bodies comprising low strength hollow articles and high expansion coefficient metals may be manufactured according to the method of this invention.
Patent KR-910009597-B1 (KR)
Title: Sand picture and making method there of
Inventor: RYUK KUN-MUK
IPC: B44C5/04
Filed: 1988-11-23
Granted: 1991-11-23
Abstract: The sand picture includes a sand, a mineral  particle  having natural color, a dyeing particle, a floating particle, a vegetable oil, a mineral oil and a crystal fluid in a  transparent  case  in the frame. The method  for  making  the  sand  picture  comprises: preparing particle materials, a preparing a case and  preparing  a crystal fluid; pouring particles in the case; and in the finishing the case to insert outer frame of "U" type.
Patent KR-940011216-B1 (KR)
Inventor: IMANAKA KOJIRO
IPC: B23B51/02
Filed: 1988-12-19
Granted: 1994-11-29
Abstract: 내용 없음.
Patent KR-910000901-B1 (KR)
Title: Caloric valve control method in petrolerum combustion apparatus
Inventor: LEE JANG-HWAN
IPC: F23N5/02
Filed: 1988-12-27
Granted: 1991-02-12
Abstract: A calorific valve control method is used for properly heating indoor air by varying the burner's carolific  value  according  to the size of a room. The method comprises a process of sensing  the initial indoor temperature when the burner gets ignited, a process of heating the room with the maximum calorific value for  a  fixed time, a process of deciding the  size  of  the  room  by  using  a relational  function  of  the  fixed  time  and  the   temperature difference, and a process of determining operational powers or  an electronic pump, an burner motor and a fan motor.
Patent KR-910007641-B1 (KR)
Inventor: MIYOSHI AKIO
IPC: G06F12/08
Filed: 1988-12-28
Granted: 1991-09-28
Abstract: 내용 없음.
Patent KR-970006662-B1 (KR)
Inventor: LENDARO JEFFERY BASIL
IPC: H04N5/63
Filed: 1989-03-24
Granted: 1997-04-29
Abstract: 내용없음.
Patent KR-0129545-B1 (KR)
Inventor: TAKUJI HIRAHARA
IPC: C08K5/00
Filed: 1989-03-29
Granted: 1998-04-07
Abstract: 내용없음
Patent KR-920000525-B1 (KR)
Inventor: MONZYK BRUCE F
IPC: C01G15/00
Filed: 1989-05-25
Granted: 1992-01-14
Abstract: 내용 없음.
Patent KR-920006638-B1 (KR)
Inventor: SUZUKI SHOJI
IPC: G11B17/26
Filed: 1989-07-05
Granted: 1992-08-10
Abstract: 내용 없음.
Patent KR-920005093-B1 (KR)
Title: Curing compositions for concrete
Inventor: YUK JONG-JIN
IPC: C09K17/00
Filed: 1989-08-04
Granted: 1992-06-26
Abstract: The hardener for a clay based soil in cement has  compsn.  of 12 wt.% calcium hydroxide,  15  wt.%  glycerin,  5  wt.%  ammonium chloride, 5 wt.% sodium chloride, 2.5 wt.% potassium chloride,  13 wt.% calcium choride and 0.3 wt.% chloropenta amine cobalt and the ramnant percentage of water. The produced hardener results in  the high mechanical strength of concrete structure and  the  beautiful color ever if the used amount is small.
Patent KR-920004984-B1 (KR)
Title: Process for making the molten pig iron
Inventor: KIM TAE-DO
IPC: C21B11/00
Filed: 1989-12-30
Granted: 1992-06-22
Abstract: In producing method for molten pig iron by putting  iron  ore pre- reduced in prereducing furnace and  slag  forming  agent  into melt reducing furnace, the  method  consists  of  dedusting  stage which dedusts exhaust gas from melt reducing furnace by  dedusting facility  at  the  temperature  of  1000-1300  deg.C,  introducing dedusted exhaust gas to the bottom of fluidized-bed furnace  which is charged with slag forming agent, preheating slag forming  agent with transferring exhaust gas from the bottom of it to the top  of it till its temperature reaches 700-900 deg.C,  dedusting  exhaust gas by introducing it to dedusing facility, and pre-reducing  iron ore  by introducing  dedusted  fluidized-bed   exhaust   gas   to pre- reducing furnace.
Patent KR-920004946-B1 (KR)
Title: Making process for the austenite stainless steel
Inventor: LEE YONG-HON
IPC: C21D8/00
Filed: 1989-12-30
Granted: 1992-06-22
Abstract: A  producing  method  for  austenite  stainless   steel   is characterized by forming conventional austenite stainless steel by finish rolling at temperature above 1000  deg.C  which  is  higher than that of carbide precipitation, cooling it down to  600  deg.C or less at a speed of at least 30 deg.C/sec by water,  winding  it by conventional method, annealing it  at  the  temperature  ranges 1050- 1080 deg.C for 1-5 min, and cleaning it  by  acid.  In  above method, precipitation of carbide during hot  rolling  and  cooling process is inhibited by the hot rolling  at  temperature  of  1000 deg.C and the fast cooling rate of at least 30 deg.C/sec.  It  has advantages of simplifying the acid cleaning process and facilities for producing austenite stainless steel.
Patent KR-0155361-B1 (KR)
Inventor: PARK SE-DONG
IPC: C08L63/00
Filed: 1989-12-30
Granted: 1998-12-01
Abstract: 내용 없음.
Patent KR-920006309-B1 (KR)
Inventor: NISHIWAKI SEIJI
IPC: C09B23/14
Filed: 1988-12-28
Granted: 1992-08-03
Abstract: 내용 없음.
Patent KR-920001787-B1 (KR)
Inventor: HUKKUHARA HIROSHI
IPC: C07B61/00
Filed: 1990-01-17
Granted: 1992-03-02
Abstract: 내용 없음.