baber/WOPTO huggingface dataset:
Patent JO-3204-B1 (JO)
Title: 4-Aryl-N-phenyl-1,3,5-triazin-2-amines containing a sulfoximine group
Inventor: ARNE SCHOLZ
Filed: 2012-05-23
Granted: 2018-03-08
Abstract: The present invention relates to 4-aryl-N-phenyl-1,3,5-triazin-2-amines containing a sulfoximine group of general formula (I) or (Ia) as described and defined herein, and methods for their preparation, their use for the treatment and/or prophylaxis of disorders, in particular of hyper-proliferative disorders and/or virally induced infectious diseases and/or of cardiovascular diseases. The invention further relates to intermediate compounds useful in the preparation of said compounds of general formula (I) or (Ia).
Patent KR-800000060-B1 (KR)
Title: Process for the preparation of thienothiazine derivatives
Inventor: PFISTER R
IPC: C07D497/02
Filed: 1975-08-25
Granted: 1980-01-29
Abstract: Thienothiazine derivs. (I; A formed B or C with two carbons, R1 = lower alkyl, R2 = aromatic heterocyclic residues, Ph, R3, R4 = H, lower alkyl) useful as antiphlogistic, anodyne, and antirheumatic, were prepd. by treating I(NHR2 = OR, R - lower alkyl) with amine (III), decyclizing IV, lower alkylizing I(R' = H), reacting I(OH = O, COHNR2 = H2) with isocyanate (O = C = N-R2) in the presence of strong base, or hydrolizing enamines (I; OH = NR5R6, R5, R6 = lower alkyl).
Patent KR-830000512-B1 (KR)
Title: 고무변성 내충격성 중합체의 제조방법
IPC: C08F279/02
Filed: 1977-08-05
Granted: 1983-03-11
Abstract: 내용 없음.
Patent KR-830002421-B1 (KR)
Title: 전송 통신 시스템용 t. d. m. 디지탈 교환기
Filed: 1978-08-21
Granted: 1983-10-26
Abstract: 내용 없음.
Patent KR-830000419-B1 (KR)
Title: 평형 능동 혼합기회로
IPC: H03B21/00
Filed: 1979-06-29
Granted: 1983-03-07
Abstract: 내용 없음.
Patent KR-830000168-B1 (KR)
Title: Rhodium catalyzed silicone rubber compositions
Inventor: ECKBERG RICHARD PAUL
IPC: C08L83/04
Filed: 1979-08-08
Granted: 1983-02-17
Abstract: Silicone rubbers with good pot life, useful as release coating, contain OH-terminated siloxanes(viscosity 100-10000 cP at 25↿) 100, silicon hydrides contg. 0.5-1.6 % H 1-20, and inhibitors(siloxanes, alkynes, dialkyl maleates, alkylalkenoates) 0.1-10 parts and 10-500 ppm(as Rh) tris(disulfide)complex of Rh trihalide. Thus, a mixt. of 90 parts OH-terminated di-Me siloxane, 10 parts OH-terminated di-Me siloxane, and 200 ppm [(C8H17)2S 3RhCl 3 had cure time 20 and 60s at 150 and 120↿, gelation time> 48 h at 24↿, and viscosity after 0 and 3h at 24↿ 350 and 365 cP-s, resp., compared with 20, 40, 10, 335, and 525, resp., in the absence of inhibitor.
Patent KR-850000304-B1 (KR)
Title: Method of removing copper ions from a bath containing same
Inventor: KRUPER WAYNE A
IPC: C25D7/10
Filed: 1980-01-19
Granted: 1985-03-18
Abstract: In a method for electrodepositing a layer of Pb-Sn on a bearing structure, which has been formed by electroplating a layer Pb-Cu-Sn on ametal substrate, the improvement is that after Pb-Cu-Sn plating, the substrate is rinsed in an aq. rinse media. The media is contacted with Pb, Sn or their alloys to replace Cu ions in the media with Pb and/or Sn ions and to deposit Cu on the remainder of the Pb and/or Sn, prior to electroplating the substrate with Pb-Sn. The treated rinse bath may be usem as a Pb-Sn plating path. The method minimizes waste rinse-water treatment problems.
Patent KR-830002549-B1 (KR)
Title: 복합 서미스터 부품
IPC: H01C7/02
Filed: 1980-08-30
Granted: 1983-11-12
Abstract: 내용 없음.
Patent KR-840001870-B1 (KR)
Title: Coating method of a percil
Inventor: IMAMURA KAZUYOSHI
IPC: B05D7/06
Filed: 1980-09-25
Granted: 1984-10-24
Abstract: Because polyester has heat plasticity, if it is heated above the softening paint it melts and therefore makes a suitable coating for paint on the surface of a pencil. The chemical attraction between the polyester and pencil axis is excellent, allowing the polyester to adhere closely to the surface of the pencil following a uniform coated surface. Because polyester is coreless or white, it can be clolored easily and dyeing the coloring agent is possible. After coating the pencil with the polyester paint, the coated surface has few thread-like traces.  The process does not swell the pencil surface or cause any discoloration.
Patent KR-850000762-B1 (KR)
Title: Elevator car position decide device
Inventor: KADAYAMA YASUNORI
IPC: B66B3/00
Filed: 1980-12-05
Granted: 1985-05-29
Abstract: The apparatus comprises a pulse generator for generating a pulse in response to the movement of the elevator car for a predetermined distance, a counter for counting the generated pulses and a direction detector for detecting the moving direction of the elevator car. A microcomputer is provided for calculating the elevator car operation parameters including the position and moving direction of the elevator car on the basis of the count registered in the counter and the detected direction. A nonvolatile memory is capable of holding stored information even in the event of service interruption in the elevator power supply system.
Patent KR-820000762-B1 (KR)
Title: Sheet having heater
Inventor: KIM J
IPC: G05B7/04
Filed: 1981-01-14
Granted: 1982-05-04
Abstract: An improved sheet heater was made which has good electric conductivity, preservation of constant temperature, flexibility and mechanical strength by coating a textile with electric heating-composition.  The composition comprises acetylene thermal black functioning as a heat-emitting portion, polyurethane elastomer giving flexibility and compatibility with acetylene thermal black, coumarone indene resin as a tackifier and thermal regulator, tribromoneopentyl alcohol as a flame retardant, and cyclized rubber giving mechanical strength.
Patent KR-840002054-B1 (KR)
Title: Rotating-discharge-type-printer
Inventor: KING OLM B
IPC: G06K15/00
Filed: 1981-03-30
Granted: 1984-11-06
Abstract: The rotary electrical graphic device has styli secured to a rotor and a feeder for moving a sheet record medium past the rotor in a derection transverse to the roter rotation direction with the styli contacting the sheet. Devices axially adjust the position of the styli relative to the rotor to align the images produced by the styli. Pref. characters are printed by forming them from dots. The styli are arranged in at least one group containing the same number of styli as required to form all of the dots in one of the horizontal and vertical parts of each of the characters.
Patent KR-890000023-B1 (KR)
Title: Preparation of polymeric transition metal oxide alkoxide
Inventor: SPECA ANTHONY NICHOLAS
IPC: C08F4/52
Filed: 1981-11-24
Granted: 1989-03-06
Abstract: Catalyst components for the polymn. of α-olefins were prepd. by reaction of polymeric transition metal alkoxides with reducing metals of a higher oxidn. potential than the transition metal in the presence of dicarbonyl compds..  Thus, Ti(OBu)4 42, Mg 2.22, 2.4- pentadione 4.85 and octane 42.75g gave a purple-black soln. with gas evolution.  The above reaction products were activated with halides to give olefin polymn. catalysts.
Patent KR-870001309-B1 (KR)
Title: Metal founding in a glass-ceramic mold which is reusable
Inventor: BEETLE ROBERT H
IPC: B22D15/00
Filed: 1982-03-16
Granted: 1987-07-13
Abstract: The mould walls are made of devitrified glass in which the predominant microstructure consists of a polycrystalline ceramic. The mould is pref. a permanent mould, i.e. one which is used repeatedly, and the ceramic pref. consist of spodumen.  The outside surfaces of the mould are pref. in contact with a heat sink, whereas the inner surfaces of the moulds are pref. coated with a mould-wash, i.e. an appropriate refractory coating.  The mould walls pref. have a max thickness of 5mm, and ave transparent to infrared rays.
Patent KR-880001555-B1 (KR)
Title: Television ghost cancellation system with phase-controlled remodulation
Inventor: HOLMES DAVID D
IPC: H04N5/21
Filed: 1982-06-15
Granted: 1988-08-20
Abstract: The system compensates for the phase of the ghost carrier signal.  A video signal containing a ghost signal component is applied to a variable delay line, which delays the video signal by an amount of time equal to the difference in time between the appearance of the direct video signal and its corresponding ghost signal components. The delayed video signal is modulated by a carrier signal and modulated by a phase-shifted version of the carrier signal.  The carrier signal is phase-shifted for the demodulator by an amount which compensates for the phase difference between the picture carriers of the direct and ghost signals.  The demodulated signal is inverted and its amplitude adjusted to produce a pseudo-ghost signal which is equal in amplitude.
Patent KR-880000715-B1 (KR)
Title: Method of contralling upper thread in sewing machine
Inventor: MATSUBARA TORU
IPC: D05B47/04
Filed: 1982-08-31
Granted: 1988-04-25
Abstract: According to the method, the sewing machine includes a needle that grips the upper thread and moves vertically in association with the spindle, a loop turner that has a bobbin with the lower thread and revolves with the spindle to stitch seams cooperation with the needle, and a control bar that moves vertically in association with the spindle for loosening or tightening the upper thread for the peirod from the moment that the loop of the upper thread leaves the loop turner to the moement that the seam tightening is completed to apply a necessary tension to the upper thread.
Patent KR-900006835-B1 (KR)
Title: Process for preparing pyridazinone derivatives
Inventor: TANIGUCHI MASAKAZU
IPC: A01N55/00
Filed: 1983-03-05
Granted: 1990-09-22
Abstract: 4-Halo-5-benzyloxy-2-alkyl-3-(2H)-pyridazinone derivs. of formula (I) are prepd. by reacting a cpd. of formula (II) with a cpd. of formula (III). In the formulas, R is alkyl; R1 and R2 are each H or lower alkyl; X is H, halogen, lower alkyl, lower alkoxy, -haloalkyl, - haloalkoxy, cycloalkyl, -Si(CH3)3 or (IV); Y is H, halogen, lower alkyl, lower alkoxy, -haloalkyl, -haloalkoxy or cycloalkyl; m= 1-3; n= 1-5; Z is halogen. (I) are useful as fungicidal, insecticidal, acaricidal and nematocidal agents.
Patent KR-860001090-B1 (KR)
Title: Propylene-ethylene copolymers for high-rigidity moled products and process for producing the same
Inventor: JIBA HIROMASA
IPC: C08F297/00
Filed: 1983-05-17
Granted: 1986-08-07
Abstract: A propylene-ethylene block copolymer is obtd. by (i) polymerizing propylene in an amt. of 70-95 wt.% w.r.t. total polymerized amt. in the presence of a catalyst(I); and (ii) then polymerizing ethylene and propylene in an amt. of 30-5 wt.% w.r.t. total polylmerized amt. in the presence of the catalyst(I). The ethylene content is 3-20 wt.% w.r.t. total polymerized amt. Then (I) is obtd. by reacting an organo-Al compd. with an electron donor.(pref. ether) and TiCl4. The copolymer is used for manufacturing high rigidity molded prods.
Patent KR-890000729-B1 (KR)
Title: Culture medium for cell line
Inventor: SHIVE WILLIAM
IPC: G01N33/50
Filed: 1983-06-03
Granted: 1989-03-30
Abstract: A culture medium contg. vit., amino acids, mineral salts, carbohydrates and lipids is presented.  The characteristic of this medium is that the compn. of the medium may vary according to the different cell lines.  The medium is generally composed of carbohydrates, pantothenic acid, choline, mineral salts, deionized water, and buffered serum (pH 6.8-7.6) contg. mitogen for stimulating lymphocyte to be analyzed.
Patent KR-900001886-B1 (KR)
Title: Aryl and heteroaryl (7-(aryl and heteroaryl) pyrazolo (1,5-a) pyrimidine-3-yl) methanones and preparation thereof
Inventor: DUSZAE JOHN P
IPC: C07D487/04
Filed: 1984-06-22
Granted: 1990-03-26
Abstract: The title cpds. of formula (I), useful as anxiolytics, sedative- hypnotics, antiepileptics and skeletal muscle relaxant agents, are prepared.  In (I), R1 is (un)substd. phenyl, maphthalenyl thiazolyl, biphenyl, thienyl, furanyl or pyridinyl; R2, R4 and R5 are each H or C1-3 alkyl; R3 is substd. phenyl, furanyl, thienyl, pyridinyl of pyridine-1-oxide.
Patent KR-890001752-B1 (KR)
Title: Approchable apparatus of a vessel
Inventor: SAWARAKI TORU
IPC: B63B59/02
Filed: 1984-10-11
Granted: 1989-05-19
Abstract: The device comprises a combination of a fender (13) made of spring material with dash-pots (18,19) mounted on the wall so that some of the impact energy is absorbed by the spring material of the fender in the form of displacement energy, and some is dissipated by the dash- pot in forcing fluid from one chamber (18a) to another (18b) through restricted orifices (19a).  The dash-pot may be provided with a by- pass path (11) for the fluid containing a non-return valve (12) so that the path is closed when the device is being compressed but is open to allow the device to return quickly to its rest state when a vessel moves away from the device.
Patent KR-910007221-B1 (KR)
Title: Process for preparing 4,6-bis trichloromethyl-s-triazines and light-sensitive mixture containing these compounds
Inventor: BUHR GERHARD
IPC: C07D251/24
Filed: 1984-10-11
Granted: 1991-09-20
Abstract: Light-sensitive compounds are described which have the formula <IMAGE>  (I)  wherein R1 and R2 denote H or alkyl, R3 and R4 denote H or 4,6-bis-trichloromethyl-s-triazin-2-yl, R5 and R6 denote H or halogen, alkyl, alkenyl or alkoxy, and Ar denotes a mononuclear to trinuclear aromatic group. These compounds are suitable as photoinitiators for free-radical polymerizations or as photolytic acid donors for acid-cleavable compounds, and for cross-linking and color formation reactions. They are distinguished by a high sensitivity in various spectral ranges.
Patent KR-880001944-B1 (KR)
Title: 2,5-diketo-d-gluconic acid reductase
Inventor: SONOYAMA DAKKAYAS
IPC: C12N9/04
Filed: 1984-11-16
Granted: 1988-10-04
Abstract: Prepn. of 2,5-diketo-D-gluconic acid reductase (I) by fermn. of corynebacterium ATCC 31088 comprises (a) inoculating a preculture of corynebacterium into a medium (pH 7.0) contg. glucose 1, corn steep liquor 1, yease ext. 0.2, polypeptone 0.5, KH2PO4 0.1, and HgSO4.7H2O 0.02% and incubating for 18 hr at 28≰C under submerged aerobic conditions; and (b) cracking the cells and purifying(I) from the liq. fraction by pptn. with (NH4)SO4, dialysis, ion-exchange chromatog., and affinity chromatog.
Patent KR-910009125-B1 (KR)
Title: Cylindrical fibrous structures and method of manufacture
Inventor: PAUL DAVID B
IPC: D04H1/56
Filed: 1985-01-05
Granted: 1991-10-31
Abstract: Cylindrical fibrous structures comprising a fibrous mass of nonwoven, synthetic, polymeric microfibers wherein the microfibers are substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement or intertwining, the fiber structure having a substantially constant voids volume over at least a substantial portion of the structure and, preferably, a graded fiber diameter structure, both as measured in the radial direction. The structures are particularly useful as depth filters.The method for preparing such fibrous structures comprises the steps of:(a) extruding synthetic, polymeric material from a fiberizing die and attenuating the extruded polymeric material to form microfibers by the application of one or more gas streams directed toward a rotating mandrel and a forming roll in operative relationship with the mandrel;(b) cooling the synthetic, polymeric microfibers prior to their collection on the mandrel to a temperature below that at which they bond or fuse together, thereby substantially eliminating fiber-to-fiber bonding; and(c) collecting the cooled microfibers on the mandrel as a nonwoven, synthetic fibrous mass while applying a force on the exterior surface of the collected microfibers by the forming roll; wherein the process variables are controlled to form the cylindrical fiber structure with at least the major portion of the fibrous mass having a substantially constant voids volume.
Patent KR-880000081-B1 (KR)
Title: Dialing circuit of a wireless telephone
Inventor: LEE HYUN-HAENG
IPC: H04M11/00
Filed: 1985-09-27
Granted: 1988-02-22
Abstract: In the invention, the tone signals dialed at the key pad of portable unit are transmitted by an antenna and received by a fixed unit to dial correct pulse/tone signals for delivering to a line.  Between the output terminal of a discriminator 21 and the input terminal of the regulator 25 are connected a low-pass filter 22, a DTMS-to- keyboard converter 24 and a speaking circuit network 25 in order. The actuation of the tone/pulse switch SW3 applies tone dial signals via the network 25 to the regulator 26, but pulse dial signals are directly applied to the regulator.
Patent KR-900002573-B1 (KR)
Title: Arc-heating type axtra-furnace refining apparatus
Inventor: KAMADA YONEICHI
IPC: C21C7/00
Filed: 1985-10-10
Granted: 1990-04-20
Abstract: A ladle containing molten steel tapped from a conveter is covered by a lid containing an electrode in order to effect final steel refinement by means of an arc heating process.  Sealing means are provided between the electrode and the insertion hole to prevent metal oxidation or nitrogen pickup.  Argon gas is injected into the seal of the electrode and down into the metal.  The seal may be water cooled.  The gas seal prevents ingress of atmospheric air into the ladle, thus preventing metal oxidation or nitrogen pick-up.
Patent KR-890004523-B1 (KR)
Title: Fuel injection pump
Inventor: ISIBASHI DORU
IPC: F02M47/00
Filed: 1985-11-12
Granted: 1989-11-10
Abstract: A lift-limiting plunger (13) is slidably fitted in a chamber (6) to receive fuel pressure for limiting the lifting amount of nozzle needle (14).  A back pressure chamber (6a) is defined by an end face of the plunger.  A selector valve (21) is controlled by an electronic control unit.  A pressure inlet chamber (18a) communicates with the back pressure chamber and is selectively communicated with the fuel intake passageway, in synchronism with selective establishment and interruption of communication between the back pressure chamber and the fuel intake passageway.  An accumulator (19) is slidably fitted within an accumulator chamber liftable in a direction away from the pressure inlet chamber.
Patent KR-950013827-B1 (KR)
Inventor: MOREL MICHEL
IPC: C22F1/18
Filed: 1986-01-09
Granted: 1995-11-16
Abstract: 내용 없음.
Patent KR-900002951-B1 (KR)
Title: Push-button device
Inventor: WATANABE TOSHIO
IPC: H01H13/70
Filed: 1986-01-16
Granted: 1990-05-03
Abstract: A push button switch for electronic appliances comprises a casing (18) having a recess (19), and a U-shaped push button member (11) assembled in the recess of the casing.  The push button member consists of several legs (14) for fixing it to the casing through receiving holes (25), a push rod (16) operating an electric switch (29), and a hinge part (13) serving as a fulcrum formed between the legs and the push rod.  On the bottom surface of the recess of the casing, a number of restricting ribs (22) are prepared for the excessive push of the button member.
Patent KR-890001165-B1 (KR)
Title: Conveyor for conveying an adhesive belt-like object
Inventor: TAKEHARA KATSUOMI
IPC: B65H20/06
Filed: 1986-02-11
Granted: 1989-04-26
Abstract: A conveying surface contacts an object to be conveyed and is formed by a number of endless coiled springs which rotate in accordance with the rotation of a main roller.  The conveyor surface is strained over the main roller and a subordinate roller, which is provided at an appropriate distance from the main roller and which rotates freely. The axis of the helix of each of the coiled springs runs in the direction of conveyance.  When the endless coiled springs rotate in accordance with the rotation of the main roller, the pitches or distances between outer portions of the turns of the coiled springs, which are close together along a linear portion of the conveyance path, spread out and travel in an arc shaped path along a non-linear portion of the conveyance path.
Patent KR-890000760-B1 (KR)
Title: Converting device of dc - ac
Inventor: LEE JONG-SOK
IPC: H02P27/06
Filed: 1986-03-26
Granted: 1989-04-03
Abstract: The DC power voltage is divided by distributing resisters (R12-18, R21-28) in which the distributed voltages of the resisters (R12-18) are provided to a multiplexer (1), and another voltages of the resister (R21-28) to a multiplexer (2).  The outputs of (1,2) are provided to a power amp. (5) through an adder (3) and a low pass filter (4) to then drive a motor (8).  The address inputs (A0-2) of (1,2) are connected to the output (OA0-2) of a counter (6) of which output (OA3) is connected to driving taps (EN) of (1,2).  A variable oscillator (7) adjusts the freq. of the clock pulse to control the rotation speed of the motor.
Patent KR-870001847-B1 (KR)
Title: Method for producing ginseng extract
Inventor: KIM MYONG-HO
IPC: A23L2/38
Filed: 1986-06-19
Granted: 1987-10-17
Abstract: Soft capsule contg. ginseng ext. is prepd.  Thus, ginseng is extd. with 70 wt.% EtOH and concentrated under vaccum to give the concd. ginseng exts. (H2O, 36±2 wt.%).  This is mixed with wheatgearm oil, heated at 55-60≰C, homogenized with monoglycoride deriv., screened with 100 mesh of sieve, and deaerated under vaccum.  The mixts. is packed into a gelatinous capsule by common method to give final product.
Patent KR-890005263-B1 (KR)
Inventor: ASANUMA DADASHI
IPC: B04C5/18
Filed: 1986-11-28
Granted: 1989-12-20
Abstract: 내용 없음.
Patent KR-940002942-B1 (KR)
Title: Process for preparing antimycotic nail varnish
Inventor: DIETMAR WATER
IPC: A61K8/00
Filed: 1986-12-19
Granted: 1994-04-09
Abstract: 1. An antimycotic nail varnish containing a) a 1-hydroxy-2-pyridone of the formula I   see diagramm : EP0226984,P8,F2   in which R**1 is a saturated hydrocarbon radical having 6-9 carbon atoms, one of the radicals R**2 and R**4 is a hydrogen atom and the other is hydrogen, methyl or ethyl and R**3 is an alkyl radical having one or two carbon atoms, in the free form or in salt form, as the antimycotic substance, b) a water-insoluble film-forming agent, c) a physiologically acceptable solvent, and if appropriate d) additives customary in cosmetics.
Patent KR-900005009-B1 (KR)
Title: Long acting formulation
Inventor: MACFARLANE CALUM B
IPC: A61K45/08
Filed: 1987-01-28
Granted: 1990-07-16
Abstract: Prodn. of spheroids which provide long-acting sustained release of dihydropyridine Ca-channel blocker (I) comprises (1) forming aq, wet mass of (I) plus a binder (II) which is less soluble at low than at high pH (the binder is at least 3 wt.% based on dry components), (2) extruding the mass into rod-shaped, cylindrical segments of dia. up to 1.2mm, (3) shaping these segments into spheroids and (4) drying. (II) are pref. (a) phthalic acid derivs. for vinyl (co) polymers, hydroxyalkyl- or alkylcelluloses (or their acetates), cellulose acetates or ethers, or their partial esters or (b) (co)polymers of lower alkyl acrylic acids and lower alkyl acrylates, or their partial esters.
Patent KR-930009324-B1 (KR)
Inventor: GROTH ROLF
IPC: C23C14/18
Filed: 1987-02-26
Granted: 1993-09-27
Abstract: 내용 없음.
Patent KR-900007358-B1 (KR)
Title: Ejecting device for vulcanized tire
Inventor: OHNISHI HISAYAKI
IPC: B29D30/26
Filed: 1987-03-14
Granted: 1990-10-08
Abstract: The device comprises a tire take-out arm, situated forward and backward movably to and from the center of tire vulcaniser, and inclinably toward the raising and tire take-out side in the center position; guide cam located between the take-out arm in an inclining orientation and a take-out spot and having inclined slide surface; tire holding arm, which is situated elevatably together with the take-out arm or alone, makes support contact with the upper surface of tire on the take-out arm, and is provided at rear end with stopper for locking tire; guide plate, which has vertical arm guide member rolling on the inclining sliding surface of the cam, is situated on the guide cam slide.
Patent KR-920009825-B1 (KR)
Inventor: CHIODI WAYNE R
IPC: H01J29/07
Filed: 1987-03-25
Granted: 1992-10-22
Abstract: 내용 없음.
Patent KR-910001066-B1 (KR)
Inventor: SYUJI DAKEDA
IPC: H01F41/06
Filed: 1987-09-26
Granted: 1991-02-23
Abstract: 내용 없음.
Patent KR-900008575-B1 (KR)
Inventor: LEE KANG-WON
IPC: B23K9/127
Filed: 1987-12-12
Granted: 1990-11-26
Abstract: 내용 없음.