baber/WOPTO huggingface dataset:
Patent KR-870002182-B1 (KR)
Title: Process of making molten metal in cupola
Inventor: HAMILTON JARRETTE ANTHONY
IPC: F27B1/00
Filed: 1982-01-14
Granted: 1987-12-28
Abstract: Molten metal is produced by (i) charging coke and metal to a cupola furnace; (ii) buring the coke with introduced O2-contg. gas (I); (iii) additionally injecting  O2-contg. gas (II) having a higher O2 concn. than (I) into the furnace, at a rate of flow such that the O2 concn. of (I) is enriched by 0.5-10%. The improvement is that the gas (II) is injected into the furnace at a supersonic velocity. Metal melting is more efficient than in other methods in which oxygen is injected directy into the furnace, because the increased rate of flow of ozygen gives increased combusion reasction penetration. Thus, less coke or fuel is required.
Patent KR-880002650-B1 (KR)
Title: Method for driving a picture display, particulaly an ac electroluminescent display
Inventor: HARJU TERHO TEUVO
IPC: G09G3/32
Filed: 1982-04-14
Granted: 1988-12-08
Abstract: The device comprises a matrix consisting of X and Y electrodes and based on the thin film technique, with a drive voltage comprising positive and negative pulses.  Selection pulses are applied to the X electrodes, to one electrode at a time, while the other X electrodes are floating, and modulation pulses are applied to the Y electrode while most of the X electrodes are floating. The modulation voltage is lower than one half of the entire drive voltage, and the modulation is applied both to the positive and to the negative pulses of the drive voltage of the display by changing the phases of the modulation pulses and of the selection pulses.
Patent KR-880000569-B1 (KR)
Title: Stuffing box assemblies
Inventor: SCOBIE WILLIAM BRYCE
IPC: F16J15/18
Filed: 1982-04-15
Granted: 1988-04-15
Abstract: A stuffing box has a tubular neck extending outwardly from a main body and a housing flange extending radially outwardly from the neck and longitudinally spaced from the main body.  A bore extends longitudinally through the neck and the adjacent part of the main body and a slot communicates with the bore to open radially outwardly through the neck on the opposite side of the housing flange from the main body.  A shaft is received in the bore for movement w.r.t. the housing and an annular seal within the bore surrounds the shaft.  The gland has a compression formation at least partially within the bore adjacent one end of the seal and a flange joining the compression portion and extending laterally outwardly through the slot in the housing.
Patent KR-890002885-B1 (KR)
Title: Additive for hydraulic cement mixes
Inventor: ROSSKOPF PHILIP A
IPC: C04B28/04
Filed: 1982-09-08
Granted: 1989-08-08
Abstract: A hydraulic cement mixt. comprises a hydraulic cement, an aggregate of 80 wt.% based upon the total weight of the cement mixt., a sufficient water to effect hydraulic setting of the cement, and an additive.  The additive contains (a) an alkali metal, alkaline earth metal or ammonium salt of thiocyanic acid of 0.05-2.5 wt.% based upon the weight of the cement, and (b) an alkanolamine of 0.001-0.05 wt.% based upon the weight of the cement.
Patent KR-880001943-B1 (KR)
Title: Process for preparing benzopyrans
Inventor: EVNS JOHN M
IPC: C07D311/68
Filed: 1982-09-24
Granted: 1988-10-04
Abstract: Benzopyran derivs. of formula (I) are new.  In (I), one of R1 and R2 is H, and the other is alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy, alkylhydroxymethyl, NO2, CN, Cl, CF3, alkylsulphinyl, alkylsulphonyl, alkoxysulphinyl, alkoxysulphonyl, alkylcarbonylamino, alkoxycarbonylamino, aminosulphinyl, aminosulphonyl, aminocarbonyl, alkylsulphinylamino, alkylsulphonylamino, alkoxysulphinylamino, alkoxysulphonylamino, ethylenyl, -C(alkyl)NOH or -C(alkyl)NNH2; one of R3 and R4 is H or C1-4 alkyl, and the other is C1-4 alkyl; CR3R4 is C3-6 spiroalkyl; R5 is H, C1-3 alkyl or C1-8 acyl; n is 1 or 2.  The lactam gp. is trans to the OR5 gp..  Compds. (I) are useful as antihypertensives.
Patent KR-890000054-B1 (KR)
Title: Getter-lubricant coating for nuclear fuel elements
Inventor: PALMER DAVID N
IPC: G21C3/20
Filed: 1983-09-29
Granted: 1989-03-06
Abstract: A coating layer in nuclear elements comprises a homogeneous mixt. of a liq. vehicle, a lubricating matrix, a getter intercalated and chemically bound into the matrix, and a binder.  The getter is Zr, Y, Ti, Ce, Co, Ni, Cr, or a compd., alloy or mixt. thereof.  The matrix is graphite or boron nitride.  The binder is pref. aluminate or silicate.  The vehicle is pref. isopropanol or acetone.
Patent KR-900004781-B1 (KR)
Title: Light-reflector type encoding method and the encoder
Inventor: TANAKA TOSHIYASU
IPC: G01D5/347
Filed: 1984-12-04
Granted: 1990-07-05
Abstract: A light reflector type encoder includes a rotatable disc (20) coupled to the subject under detection, by shaft (22). The disc has on its surface a large number of light transmittable graduations (24) provided at a uniform, highly accurate, pitch and radius. Graduations (24) are slits which allow light to pass through and thereby present a much different degree of reflectivity than the remaining surface of the disc (20). A fixed optical lattice (26) of the same diameter as disc (20), is positioned relative to end face (30A) of optical fibre (30). Within optical lattice (26) the number of graduations (slits) (28) is determined in relation to the light emitting area of optical fibre (30) which not only emits the light from a source within the processing unit (32).
Patent KR-890004326-B1 (KR)
Title: Devices for processing colour signals
Inventor: MATSUMOTO DOKIKAS
IPC: H04N9/793
Filed: 1985-06-08
Granted: 1989-10-30
Abstract: The processor is to simplify the circuit constitution and to stabilize a device against the variances of temperature and element capacity.  The chrominance signal input from a terminal (11) is converted to digital signal by an A/D converter (12) and is sent to a digital signal processor (13) and a level comparator (10) consisting of a synchronous detecting circuit (16), a D/A converter (17), an low pass filter (18), and a level comparator (19).  The amplitude of a burst signal obtained by detection of the circuit (16) is converted to an analog signal by the converter (17) and passes the filter (18).
Patent KR-930007584-B1 (KR)
Inventor: PRIAROGGIA PAOLO G
IPC: G02B6/24
Filed: 1986-02-28
Granted: 1993-08-13
Abstract: 내용 없음.
Patent KR-930007074-B1 (KR)
Title: Power press
Inventor: HEIBERGER FRANCIS E
IPC: B30B15/20
Filed: 1986-06-25
Granted: 1993-07-29
Abstract: A hydraulic overload control system for a mechanical power press (11) having a flywheel driven eccentric shaft (24) and one or more pitmen (25) drivingly coupled to the eccentric shaft (23). The press (11) has a slide (17) drivingly coupled to the pitmen by corresponding hydraulic piston (50) and cylinder (29) connections. The overload control system includes means (27) for generating a first electrical signal having s value proportional to the force exerted on the die (31) by the slide (17) throughout the work stroke thereof; means for generating (27) a second electrical signal having a value proportion­al to the position of the slide (17) throughout the work stroke; means for storing (64) the maximum tonnage capacity values of the press at a multiplicity of slide positions throughout the work stroke; control means (61) responsive to the second electrical signal for retrieving the stored value representing the maximum tonnage capacity of the press at the slide position represented by the second signal; means for comparing (61) the retrieved value corresponding to the second signal with the value of the first signal to determine whether the press is in an overload condition; and means responsive to the determination of an overload condition at any point in the work stroke for actuating the clutch and break interlock mechanism of the press to stop movement of the slide (17).
Patent KR-890002826-B1 (KR)
Title: A composition for the protecting airpollution and saving energy
Inventor: CHOI HYUN-TAEK
IPC: C10L1/12
Filed: 1986-07-16
Granted: 1989-08-04
Abstract: A compsn., useful as additive for bunker C, is prepd. by homogeneously mixing NaOH or KOH 80-120 wt. parts magnesium chloride 25-75 wt. parts calcium chloride 80-120 wt. parts and sodium carbonate 10-50 wt. parts with water 80-150 wt. parts.
Patent KR-950007283-B1 (KR)
Inventor: HANSEN JOHN C
IPC: F24F11/02
Filed: 1986-09-16
Granted: 1995-07-07
Abstract: 내용 없음.
Patent KR-940006407-B1 (KR)
Inventor: NAKAYAMA HISAO
IPC: C02F9/00
Filed: 1986-10-04
Granted: 1994-07-20
Abstract: 내용 없음.
Patent KR-890002020-B1 (KR)
Title: Pyrophosphate coating process for calcium carbonate dental abrasives
Inventor: CHICHAN ALBERT S
IPC: C09C1/02
Filed: 1986-10-08
Granted: 1989-06-08
Abstract: A process for preparing CaCO3 abrasive coated with pyrophosphate comprises contacting unhalogenated pulverized CaCO3 having an everage particle size of 0.2-30μ in a liq. dispersion with an alkali metal pyrophosphate source at the reaction temp. to produce a pyrophosphate deriv., to chemisorb 0.42-21 wt.% of P2O5 based on total wt. of abrasive on the CaCO3 particle surface.  The CaCO3 abrasive is used in dentifrice compsns. e.g. tooth powders and toothpastes.
Patent KR-900000752-B1 (KR)
Title: Method and apparatus for regeneration of hydrocarbon conversion catalyst
Inventor: GREENWOOD ARTHUR R
IPC: C10G35/12
Filed: 1986-12-27
Granted: 1990-02-15
Abstract: A regeneration of a spent hydrocarbon conversion catalyst involves using a moving bed of catalyst, where catalyst is passed through several treatment zones, in a unique regeneration vessel. The catalyst is first contacted with a hot oxygen-contg. gas stream in a burning zone to remove coke.  The catalyst is then passed into a drying zone for the removal of water formed in the combustion zone by passing a hot dry air stream through the catalyst.  The hot air stream is produced by heat exchange with catalyst.  After passing through the drying zone, the air stream provides oxygen for the combustion in the combustion zone.
Patent KR-940008691-B1 (KR)
Title: Data recording and reproducing method
Inventor: SAKO YOICHIRO
IPC: G11B19/28
Filed: 1987-02-16
Granted: 1994-09-24
Abstract: When a time-sequential signal such as an analog or digital data signal is recorded on a disc-shaped recording medium (11), the transmission rate of the digital data is determined or the time-sequential analog signal is sampled at a predetermined sampling frequency to obtain time-sequential digital data which is sequentially recorded on the disc-shaped recording medium (11). The rotational speed of the disc-shaped recording medium (11) is controlled in response to the transmission rate of the time-sequential digital data. The transmission rate is recognised by a speed control signal generator circuit (36) either from clock signals derived from self-clocking digital data supplied to an input terminal (31D), or from a separate signal indicative of the transmission rate supplied to a terminal (31R). In the case of an analog signal supplied to an input terminal (31A), an analog-to-digital converter (32) sets the transmission rate and this is detected by the speed control signal generator circuit (36). The rotational speed of the disc-­shaped recording medium (11) is controlled by controlling the speed of a driving motor (21) by means of a phase comparator circuit (23), an integrator circuit (24) and a motor drive circuit (25).
Patent KR-900009118-B1 (KR)
Inventor: KATONO MASAYUKI
IPC: G06F17/21
Filed: 1987-03-11
Granted: 1990-12-22
Abstract: 내용 없음.
Patent KR-950009006-B1 (KR)
Inventor: VINCI JAMES N
IPC: C10N50/10
Filed: 1987-04-10
Granted: 1995-08-10
Abstract: 내용 없음.
Patent KR-920003616-B1 (KR)
Title: Video recorder
Inventor: KATEN WIRGEN
IPC: G11B15/14
Filed: 1987-08-29
Granted: 1992-05-04
Abstract: The recorder has a rotating head drum (KT), which bears video heads (K1, K2), around part of which a magnetic tape (B) passes, and has at least one pulse generator (M) seated on the head drum (KT) and at least one measuring sensor (S) for generating a head switching signal, which effects the switching from one video head to the other, as well as having a control head (KK) for scanning the vertical synchronisation signal during playback. In playback mode, the time between the signal supplied by the measuring sensor (S) and the vertical synchronisation signal is measured and compared with a set value. From the comparison, a criterion for controlling the timing of the head switching signal is obtained. 
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Patent KR-910005373-B1 (KR)
Inventor: SANO KENJI
IPC: G03B13/36
Filed: 1987-09-07
Granted: 1991-07-29
Abstract: 내용 없음.
Patent KR-960000272-B1 (KR)
Inventor: WILHELMUS P M RAAYMAKERS
IPC: G11B7/24082
Filed: 1987-10-06
Granted: 1996-01-04
Abstract: 내용 없음.
Patent KR-900006444-B1 (KR)
Title: Process for the preparation of 2-amino-3,5-dibromobenzyl amine derivative
Inventor: CHONG YONG-HO
IPC: C07C215/68
Filed: 1987-10-23
Granted: 1990-08-31
Abstract: 2-Amino-3,5-dibromobenzylamine deriv. of formula (I) is prepd. by reacting a cpd. of formula (II) with a cpd. of formula (III), and then removing syllyl gp. of the obtained cpd. in the presence of water or alcohol. In the formulas, X is halogen or sulfonate (e.g. Cl, Br, OMs or OTs). (I) is useful as expectorants and bronchial asthma treating agents.
Patent KR-950010981-B1 (KR)
Inventor: KLAUS HAHN
IPC: C08K5/09
Filed: 1987-11-28
Granted: 1995-09-26
Abstract: 내용 없음.
Patent KR-900009097-B1 (KR)
Inventor: HIRAKO ATSUSHI
IPC: B60W10/18
Filed: 1987-12-26
Granted: 1990-12-22
Abstract: 내용 없음.
Patent KR-900005940-B1 (KR)
Title: Method for producing roux
Inventor: YAMAMOTO YOSHIKATU
IPC: A23L23/00
Filed: 1988-01-05
Granted: 1990-08-13
Abstract: Prodn. of roux comprises (1) drying flour with hot air at 80-200 deg. C until its moisture content falls to 0.5-10 wt.% and to a level below that required to cause swelling of starch in the flour; (2) adding fats and oils of m.pt. up to 55 deg.C in wt. ratio flour to fats and oils 1/5-1/0.25; then (3) heating and mixing at 65-130 deg.C for 5-60 mins. Problems of powdery or grainy texture and raw material odour are eliminated. The roux has rich, well developed flavour. It is soft and  pleasant to the palate and aquires desirable colour tone, e.g. brown. Used in sauces, soups and curries.
Patent KR-920003096-B1 (KR)
Inventor: HAKIMADA OSAMU
IPC: B62K19/28
Filed: 1988-05-13
Granted: 1992-04-18
Abstract: 내용 없음.
Patent KR-920000629-B1 (KR)
Title: Manufacturing method of semiconductor device using etch-back process
Inventor: CHOI KYU-HYUN
IPC: H01L21/28
Filed: 1988-06-21
Granted: 1992-01-17
Abstract: The manufacturing method for semiconductor device consists of three unit processes: (A) the first process forming  contact  area on semiconductor  substrate  (11),  the  second  process  forming patterns after coating the first metal layer (15) on  the  contact area,  and  the  third  process  forming  successively  interlayer insulation film and the second metal layer on the substrate  (11). Between second and third  processes  three-stepwise  operation  is continuously repeated more than  twice:  the  first  step  forming successively insulation film (16)  and  photoresist  (17)  on  the substrate (11), the second step etching photoresist (17), and  the third step etching back (17) and (16) in the ratio of 1:1.
Patent KR-960000869-B1 (KR)
Inventor: HISAMUNE TAKAYUKI
IPC: H01J61/44
Filed: 1988-06-22
Granted: 1996-01-13
Abstract: 내용 없음.
Patent KR-900003410-B1 (KR)
Title: Preparing method for n.n.n.-trimethyl-2-(phospooxy) ethaneammonium chloride methal salts
Inventor: LIM HUN
IPC: C07F9/44
Filed: 1988-06-30
Granted: 1990-05-18
Abstract: The title cpd. is prepd. by reacting trimethyl(2-hydroxyethyl) ammonium chloride (l mole) with orthophosphoric acid (3 moles) in the presence of dehydrating agent i.e. P2O5 for 30 min-5hr at 50-70 deg. C. The title cpd. is usedul as a starting material for the prodn. of cytidine phosphate choline ester, which is useful for treating hepatic disease.
Patent KR-950006374-B1 (KR)
Inventor: ASAMO GATSUQ
IPC: B43K5/00
Filed: 1988-07-29
Granted: 1995-06-14
Abstract: 내용 없음.
Patent KR-960010115-B1 (KR)
Title: Apparatus for preparing thermoplastic products
Inventor: PETSCHNER GOETI
IPC: B29C48/03
Filed: 1988-08-17
Granted: 1996-07-26
Abstract: The apparatus for processing synthetic thermoplastic material includes a receiving container, containing a disintegrating and blending member, which is disposed near the bottom of the container and which rotates about the axis of the container and with which a screw extruder is in flow connection through an opening in the wall of the container. For a trouble-free, absolutely even and continuous charging of the screw extruder, irrespective of temperature and rotational speed, the arrangement is such that the cylinder, surrounding the extruder screw of the screw extruder, opens out with its front-end charging opening at least approximately tangentially in the inside wall of the receiving container.
Patent KR-910009007-B1 (KR)
Title: Input signal memory detective method and apparatus
Inventor: OH CHUL-HUI
IPC: G01R29/24
Filed: 1988-09-16
Granted: 1991-10-26
Abstract: an A/D converter (A)  converting  the analog input  signal  detected  from  a  hook-on   type   current transformer to the digital signal; a memory block  (B)  memorizing the digital signal; an address command block  (C)  commanding  the address  of  the  memory  block;  a  pulse  generation  block  (D) generating the reference pulse with the arbitrary set time; and  a control circuit controlling an initial reset, a write/read signal, an output signal, and a control signal.
Patent KR-0131074-B1 (KR)
Title: Nitrogen containing heterocyclic peroxy acid
Inventor: VENTURELLO CARLO
IPC: C07D211/46
Filed: 1989-05-04
Granted: 1998-04-17
Abstract: Disclosed are monopersulfates of nitrogen containing heterocyclic (poly)percarboxylic acids of formula: <CHEM>  wherein: R represents hydrogen or alkyl, (hetero)cycloalkyl, (hetero)aryl, alkylaryl or arylalkyl, said groups being optionally substituted, a carboxylic group or a percarboxylic group, or any other substituents non-reactive in the presence of the percarboxylic group;  R<1> represents an alkyl group having more than 5 carbon atoms;  n is selected from 0,1 and 2; m is selected from 1, 2 and 3; and the heterocyclic ring may optionally be condensed with at least one further (hetero) aromatic or (hetero)cycloalkyl ring. Also described is a process for the preparation of said salts and their use as bleaching agents.
Patent KR-930001260-B1 (KR)
Inventor: MATSUMOTO MAKOTO
IPC: C08G77/08
Filed: 1989-09-27
Granted: 1993-02-22
Abstract: 내용 없음.
Patent KR-930003444-B1 (KR)
Inventor: INOUE ICHIRO
IPC: G06F12/08
Filed: 1989-10-12
Granted: 1993-04-29
Abstract: 내용 없음.
Patent KR-0176242-B1 (KR)
Inventor: AMANO TOSHIO
IPC: H04N5/57
Filed: 1990-03-06
Granted: 1999-05-01
Abstract: 텔레비젼 화상표시장치에서, 1화면분의 입력 비디오 신호가 복수의 영역으로 분할되는데 이들 영역에는 화상 정보가 샘플링되어 있으며, 연산 처리부는 메모리로부터 수신된 미리 설정된 조정용 데이타 및 샘플링된 화상 정보에 기준해서 비디오 제어 신호를 제공한다. 휘도, 색도, 샤프네스 레벨은 이러한 비디오 제어 신호에 의해 각 화면에 대해 자동적으로 제어되어 최적의 상태로 비디오 표시를 유지할 수 있다. 어두운 화면 또는 약 전계에 관련된 노이즈 문제는 제거되면서, 각 화면에 대한 비디오 출력을 조정함으로써 화질을 개선한다.
Patent KR-920002708-B1 (KR)
Title: Cheomical vapour deposition process of a tin by a plasma
Inventor: CHUN SUNG-SOON
IPC: C23C16/50
Filed: 1990-03-22
Granted: 1992-03-31
Abstract: In methods for TiN film by glow discharge of  reactive  gases such as TiCl4, N2  and  H2  and  carrier  gas  of  Ar  with  radio frequency generator, it is characterized by inserting heating wire and thermocouple to substrate and deposition temperature, ratio of TiCl4 to N2 and working gas pressure are 450-530 deg.C,  1/20-1/25 and 2-3 torr, respectively. It has advantages of lowering  rection temperature from 1000 deg.C to about 500  deg.C,  increasing  mass productivity, enhancing uniformity of film  thickness  in  complex shaped substrate. Especially, tempering process for  making  tools can be substituted for  heating  during  CVD  process,  so  it  is possible to omit heat treatment process after coating.
Patent KR-940001952-B1 (KR)
Inventor: ABE HIROSHI
IPC: G07D5/02
Filed: 1990-04-24
Granted: 1994-03-12
Abstract: 내용 없음.
Patent KR-930009961-B1 (KR)
Inventor: IWADA AKIO
IPC: B66B29/02
Filed: 1990-07-31
Granted: 1993-10-13
Abstract: 내용 없음.
Patent KR-0178037-B1 (KR)
IPC: B62H5/16
Filed: 1990-08-14
Granted: 1999-04-01
Abstract: 1. 청구범위에 기재된 고안이 속한 기술분야 
     본 발명은 자전거의 차체와 휠과의 사이에 사용하여 자물쇠를 잠그는 말굽자물쇠에 관한 것이다. 
     2. 발명이 해결하려고 하는 기술적 과제 
     본 발명은 말굽자물쇠의 진동을 억제시키므로서 자전거의 주행중에 말굽자물쇠의 부착부분으로부터의 불쾌한 소리의 발생을 방지함과 동시에 관형상케이스의 비뚤어짐의 방지를 목적으로 하여 이루어졌다. 
     3. 발명의 해결방법의 요지 
     링형상이며 또한 양단의 분리한 관형상케이스(2)와, 그 관형상케이스(2)에 미끄러져 움직이기 가능하게 수납되고 자물쇠를 잠그는 상태에서는 관형상케이스(2)의 양단을 가설하며 자물쇠는 푸는 상태에서는 가설을 푸는 만곡봉(4)와, 상기 관형상케이스(2)에 부착되어 상기 만곡봉(4)를 자물쇠를 잠그는 상태로 고정 가능한 자물쇠잠금기구(6)를 구비한 말굽자물쇠(1)에 있어서, 해당 말굽자물쇠(1)을 잠겨지는 자물쇠체에 고정시키는 고정부재(9)와, 상기 관형상케이스(2)에 부착되며 상기 고정부재(9)에 의해 해당 말굽자물쇠(1)을 잠겨지는 자물쇠체에 고정시킨때에, 잠겨지는 자물쇠체와 말굽자물쇠(1) 사이에 압착되어서 잠겨지는 자물쇠체로부터의 진동을 완충하는 완충부재(16)을 구비한 것을 특징으로 하는 말굽자물쇠. 
     4. 발명의 중요한 용도 
     본 발명 구성의 말굽자물쇠에 의하면, 말굽자물쇠가 진동하여 자물쇠체와의 부착부분이 헐거워지며 말굽자물쇠와 잠겨지는 자물쇠체와의 접촉부분으로부터 불쾌한 소리를 발하든지 말굽자물쇠의 관형상케이스에 비뚤어짐이 발생하여 작동불량하게 되는 것을 방지할 수 있다.
Patent KR-930006912-B1 (KR)
Title: Matted acrylonitile butadiene styrene resin and process thereof
Inventor: CHA JIN-YONG
IPC: C08F279/04
Filed: 1990-10-12
Granted: 1993-07-24
Abstract: The ABS resin is prepared  by  (a)  mixing  styrene  monomer, acrylonitrile  and  polybutadiene  rubber,  (2)  adding   tertiary dodecyl mercaptan and mineral  oil  into  the  mixture,  (3)  bulk polymerizing the  resultant  (2)  until  the  polymerization  rate reaches 30 wt.%, (4) suspending the  prepolymer  obtained  in  (3) using a suspending agent composed of deionized  water,  tricalcium phosphate and surfactant, (5) adding tertiary butyl benzoate  into the suspended solution (4), and (6)  suspension  polymerizing  the reactant (5) completely at 130-150 deg.C. The  content  rubber  is 5- 15 wt.% with respect to the total resin.
Patent KR-930001474-B1 (KR)
Title: Magnetic card's data recording and reproduction circuits
Inventor: JONG KI-RO
IPC: G06K19/06
Filed: 1990-11-07
Granted: 1993-02-27
Abstract: The circuit for integrating the  total  circuit  a  one  chip comprises: a data modulating circuit  (2)  converting  the  serial data inputted from CPU (1) to the F2F  (frequency  two  frequency) output signal; a current driving circuit  (3)  for  recording  the data to the magnetic card by changing of  residual  magnetic  flux density; a head signal processing circuit (6) outputting  the  F2F input signal using analog signal induced when  the  data  recorded magnetic card moves on the  magnetic  head  for  reading;  a  data demodulating circuit (7) outputting the data and the synchronizing pulse of same period to the  CPU  according  to  the  level  state change of F2F input signal.
Patent KR-920009845-B1 (KR)
Title: Etching method
Inventor: SHIN JUNG-CHOL
IPC: C25F3/04
Filed: 1990-11-13
Granted: 1992-10-31
Abstract: The etching  method,  which  broadens  the  surface  area  of aluminum (Al) foil  with  rectangular  wave  as  a  power  source, comprises controlling the duty cycle of rectangular wave  to  have more positive current time than negative current  time,  and  less maximum absolute value of positive  wave  amplitude  than  minimum absolute value of negative one. The above  controlled  rectangular wave has 2-5 times of positive current  time  than  negative  one. Then the aluminum foil, which has a  high  electrostatic  capacity per unit area, is obtained.
Patent KR-0171890-B1 (KR)
Title: Arrangement for the catalytic purification of the exhaust gases of internal combustion engines, in particular two-strok engines
Inventor: DOMESLE RAINER
IPC: F01N3/28
Filed: 1990-12-01
Granted: 1999-03-20
Abstract: The invention relates to an arrangement for catalytic purification of the exhaust gases of internal combustion engines, especially two-stroke engines, consisting of a jacket tube (1) which is arranged in the exhaust path and in which there is installed a perforated inner tube (3) to form a narrow annular space (5) between the jacket tube and the inner tube. The inner tube (3) is occupied by a catalyst. <IMAGE>