baber/WOPTO huggingface dataset:
Patent KR-790001164-B1 (KR)
Title: Naked wire for arc welding
Inventor: MASMODO DARASI
Filed: 1974-01-01
Granted: 1979-09-10
Abstract: A flux-cored electrode wire for non-shielded arc welding with a powder flux filled in a hoop case, had powder flux comprised of 30-70% of metal fluoride containing 1-3-% of CeF2 and LiF, 0.5-10% of a complex metal fluoride, 1-4.5% of a metal carbonate, 10-30% of Al-Mg alloy containing 30-60% of Al in powder form, and 5-40% of metal powder other than Al-Mg, the Si content in the flux being less than 2%, and the weight of flux to the total weight of the wire being 15-27%.
Patent KR-790001705-B1 (KR)
Title: Capsule rectification apparatus
Inventor: BOLLMAN R
IPC: B65G47/24
Filed: 1974-11-25
Granted: 1979-12-12
Abstract: An apparatus for arranging capsules at high rates to present them in uniform orientation, is camposed of a driving mechanism in a seperate chamber(12), a housing(10) supporting the sprocke-ts(18,20), a side chain of conveyor (22) wrapped arround the sprockets.  The upper action range is advanced from the lower sprocket(28) which is located at the reject station in the opposite side of transfer wheel(25).
Patent KR-790001022-B1 (KR)
Title: Process for the recovery of -caprolactom from reaction mixture of -caprolactam and sulphuric acid
Inventor: DEROOTJ A H
Filed: 1975-08-14
Granted: 1979-08-20
Abstract: ε-Caprolactam and solid (NH4)2SO4 were recovered from lactam - H2SO4 reaction mixts. by neutralizing the H2SO4 at higher atm. pressure with NH3 in a circulating vol. of (NH4)2SO4 soln.. The neutralized mixt. was separated to lactam and (NH4)2SO4 phases by using the heat absorbed by the water during the neutralization process.
Patent KR-800001253-B1 (KR)
Title: Method of consolidating soils
Inventor: SUZUKI MANAO
Filed: 1976-01-09
Granted: 1980-10-25
Abstract: a mixture of water and a gelling agent, B: a water glass aqueous solution containing a gelling agent. The steps comprises; first, A and B liquid are injected into the soil simultaneously, second, during the injection, suspending the joining operation of A liquid and only continuously B liquid is injected into the soil. The pH value of B liquid is adjusted between 5 and 9.
Patent KR-800001051-B1 (KR)
Title: Process for preparing(5-alkyl ureido-1,3,4-thiadiazide-2-yl-thio)-acetic acid ester
Inventor: ARNDT F
IPC: C07D285/12
Filed: 1976-11-05
Granted: 1980-09-29
Abstract: Title compd. (I; R = H, alkyl), useful as herbicides, was prepd. by reaction of compd. II with phosgen and amine(III) in the presence of organic or inorganic base. Thus, 25ml phosgen was condensated at -20≰C, dissolved in 50 ml methylene chloride and stirred at -5-0≰C. A soln. of 67g (5-methylamino-1,3,4-thiadiazol-2-y1-thio) acetic acid-t-butylester, 400ml methylene chloride and 33ml N,N-dimethylaniline was dropped in the soln. for 30 min, and stirred for 2 hr to give 68g [5-1,3,3-trimethylureido)-1,3,4 thiadiazol-2-y1-thio  acetic acid-t-butylester.
Patent KR-810001262-B1 (KR)
Title: Process for preparing beta-lactam containing compounds
Inventor: PONSFORD R
IPC: C07D498/04
Filed: 1977-01-29
Granted: 1981-10-08
Abstract: Title compds. (I; X = S, SO or SO2; R = C1-20 organic group; A = H or ester) useful as bactericidal and β-lactamase inhibitory activity, were manufd. by reaction of II and III.  Thus, soln. of benzyl clavulanate and methylene chloride was mixed with boron trifluoride etherate and benzyl mercapthane and washed with bicarbonate of soda to give 3-(2-thiobenzyl-ethylidene)-7-oxo-4-oxa-1-azabicyclo[3,2,0  heptane-2-benzyl carboxylate.
Patent KR-820000557-B1 (KR)
Title: Molding apparatus
Inventor: PASCH L
Filed: 1977-11-10
Granted: 1982-04-14
Abstract: Molding appts. includes an injection unit(20) having an open-ended chamber(24) in which elastomeric stock(30) can be compressed and expelled from the open end.  A multi-apertured end plate(32) and aligned multicavityn mold(22) is disposed at the open end and can be moved relative to the injection unit.  A venting mechanism(68) is in communication with the chamber(24) and the cavities(34) to simultaneously evacuate trapped fluid.  The end plate is pref. fixed to the injection unit.
Patent KR-810001552-B1 (KR)
Title: Method for manufacturing of granule-type soybean fermentates
Inventor: HARASHIMA KOU
Filed: 1978-03-22
Granted: 1981-10-27
Abstract: Raw miso was dried to an average moisture content of 20-30% (wet weight basis) by drying itself or blending with powder such as condiments or both, cut and mixed by high-speed rotating knife cutter to distribute moisture equally, put into an extruder, extruded to vacuum space in less than a few torr, crushed and dried to a desirable moisture content.
Patent KR-820001110-B1 (KR)
Title: Magnetizing apparatus and method for use in correcting color purity in a cathode ray tube and product thereof
Inventor: SMITH J
IPC: H04N9/28
Filed: 1978-07-26
Granted: 1982-06-25
Abstract: A CRT for color TV receiver includes a magnetic material located adjacent to a neck portion. A magnetizing appts. is used for establishing the color purity of three in-line electron beams within the CRT. The magnetizing appts. comprises >=2 elongated conductor loops arranged for positioning about the neck in proximity to the magnetic material and capable of being energised by a magnetizing current for creating permanently magnetised regions within the material. The magnetized regions produce a color purity magnetic field within the CRT for establishing the color purity of the three in-line electron beams.
Patent KR-790001769-B1 (KR)
Title: Industry fuel waste stove
Inventor: PARK IN HO
IPC: F24B13/00
Filed: 1978-07-27
Granted: 1979-12-17
Abstract: In a stove, for preventing a fuel from being wasted, generating a high heat, & preventing an imperfect combustion fuel from exploding, a rotatable conical cyl. (4) was folded upon the duplicate conical cyl. (3), a funnel (5) was constructed into the the fuel drum (1), a cyl. (7) with air holes (6) was folded into the duplicate rotatable cyl. (8), a vertical cyl. (9) with air holes (9a) & a helicoid plate (10) was constructed at the central portion of stove, and a hook (12) was hung to the rotatablw bar (14) having a control knob (15) at ! its end.
Patent KR-830001620-B1 (KR)
Title: 담배 필터의 천공장치
Filed: 1978-11-30
Granted: 1983-08-19
Abstract: 내용 없음.
Patent KR-840001723-B1 (KR)
Title: Process for the preparation of carboxylic peracids
Inventor: HARDY NICOLAS
IPC: C07C407/00
Filed: 1979-03-26
Granted: 1984-10-17
Abstract: The H2O2 oxidn. of alkanoic acids to peralkanoic acids was catalyzed by H2SO4, RSO3H(R=alkyl, aryl, aralkyl, alkaryl), H3PO4, acid phosphate esters, and MeCOCH(SO3H)CO2H. Thus, EtCO2H was treated with 70% H2O2 and 45% H2SO4 in ClCH2CHClMe at 39oC to yield EtC(0)OOH.
Patent KR-830000068-B1 (KR)
Title: 레일 체결구
IPC: E01B9/34
Filed: 1979-08-10
Granted: 1983-02-05
Abstract: 내용 없음.
Patent KR-830002791-B1 (KR)
Title: 사진 식자기
IPC: B41B27/00
Filed: 1979-12-04
Granted: 1983-12-16
Abstract: 내용 없음.
Patent KR-830000769-B1 (KR)
Title: d, ℓ 2-(6메톡시-2-나프틸) 프로피온산의 분할방법
IPC: C07C67/00
Filed: 1980-07-04
Granted: 1983-04-11
Abstract: 내용 없음.
Patent KR-840000488-B1 (KR)
Title: Electrophotographic toner
Inventor: NARUSAWA TOSHIAKI
IPC: G03G9/08
Filed: 1980-08-22
Granted: 1984-04-12
Abstract: An electrophotographic toner suitable for the flash fixation is composed of (a) 0.6-8 wt.% of carbon, (b) 0-5 wt.% of a dye, and (c) 62-99.4 wt.% of bisphenol A/epichloro-hydrine epoxy resin of which 95 wt.% has m.p. of 160oC, 450-5500 epoxy equivalents, and 900-8250 of average molecular weight. The flash fixation means that toner images are fixed by the rapid increase in toner temp. until the toner is melt by lightening the toner images by high energy ultraviolet rays or visible rays.
Patent KR-850001254-B1 (KR)
Title: Continous process of smelting metallic lead directly from lead-and sulfur-containing meterials
Inventor: SCHWARTZ WERNER
IPC: C22B5/02
Filed: 1981-08-04
Granted: 1985-08-26
Abstract: Continuous direct smelting of metallic Pb from S-contg. Pb materials in an elongated horizontal reactor operates at a low and constant temp. and prevents undercooling. Slag and Pb phases flow in countercurrent and O2 is blown into the molten bath from below. Pb- and S-contg. materials are charged at controlled rates on to the bath in the oxidizing zone (O) on the side where Pb is tapped, while redn. agents are charged on the other side where the slag is tapped. Temp. of bath in the reducing zone (R) is maintained at a constant level by a controlled supply of additional heat.
Patent KR-820000099-B1 (KR)
Title: Process for preparing pyrido (2,1-b)quinazoline derivatives
Inventor: TILLEY J
IPC: C07D471/04
Filed: 1981-11-13
Granted: 1982-02-17
Abstract: Title compds. (I; R1, R2, R3 = H, lower alkyl, lower allzoxy lower alkylthio, halogen, cyclopropyl, cyclobutyl, hydroxy; R4 = III; A = pyvaloyloxymethoxy; Y = H, methyl; n = 0-1), useful as anti-allergics were prepd. by the reaction of II and halomethylpyvalate.  Thus, 28.7 g 5-methylanthranyl, 25.0 g 6-chloronicotinic acid and 1.32 g potassium iodide were heated in 50 ml triethylene glycol dimethylether at 150≰C in Ar gas overnight to give 15.3 g 2-methyl-11-oxo-11H-pyrido[2,1-b quinazoline-carboxylic acid.
Patent KR-870001691-B1 (KR)
Title: Process for the preparation of 1-butene
Inventor: JUGUIN BERNARD
IPC: C07C7/00
Filed: 1981-12-05
Granted: 1987-09-24
Abstract: 1-Butene of high purity is prepd. by treating a C4 olefin fraction with MeOH to convert isobutene to Me3COMe and distg. the product to give a mixt. of isobutane, butane, and 1- and 2-butenes which are hydrogenated to eliminate butadiene, freed of isobutane, and fractionated.  Thus, a mixt. of isobutene 1.3, butane 6.4, 1-butene 27.9, 2-butenes 14.5, isobutene 49.6, and butadiene 0.3% is treated with MeOH at 50-90≰C in the presence of amberlyst 15, and the product is distd. to remove MeOH and Me3COMe, giving a fraction (contg. 0.1% isobutene and 1.3% isobutane) which is hydrogenated, freed of isobutane, and fractionated to give 1-butene.
Patent KR-850001823-B1 (KR)
Title: Photoelectric detection device for color sorting apparatus
Inventor: SATAKE TOSHIHIKO
IPC: G01J3/50
Filed: 1982-04-30
Granted: 1985-12-26
Abstract: The appts. comprises a chute, from which grains flow in a linear flux; light sources and color plates; light receiving units, each equipped with a lens and filter unit and placed opposite to the light sources and color plates; and an air jet to blow aside unwanted grain, which is activated by a signal from the light receiving units. The filter unit consists of filters on a plate, which is movably mounted on the lens barrel. The grains are separated from each other according to their color.
Patent KR-860002139-B1 (KR)
Title: Process for manufacturing high performance tubulars & intercritically heat treated tubular formed thereby
Inventor: GREER JAMES BRISON
IPC: C22C38/22
Filed: 1982-05-06
Granted: 1986-12-11
Abstract: Mfr. of high performance tubes having improved stress corrosion resistance comprises froming a tube from a killed steel contg. (by wt.) 0.20-0.35 % C, 0.35-0.90 % Mn, 0.80-1.50 % Cr, 0.15-0.75 % Mo, max. 0.25% Ni, max. 0.35% Cu, max. 0.04% P, max. 0.04% S, max. 0.35% Si, balance Fe and trace impurities. The tube, having a cross- sectional area 10-40 % greater than the desired value, is given a first intercritical heat treatment to recrystallising and refining the grain structure. Surface defects are then removed by grinding, followed by sizing and cold working to the final demensions. Th tube is given a second intercritical heat treatment and is then quenched and tempered to produce a tempered martensite structure.
Patent KR-870000200-B1 (KR)
Title: A process of hydroformylation
Inventor: ABATJOGLOU ANTHONY G
IPC: C07C67/00
Filed: 1982-08-16
Granted: 1987-02-16
Abstract: Aldehydes are produced by hydroformylating an olefinically unsatd. compd. with CO and H2 in a reaction medium contg. a rhodium complex catalyst, free triarylphosphine ligand and free organic tert. bisphosphine monoxide ligand of formula(I) with the mole ration of triarylphosphine ligand to (I) being (2-30):1 (Ar is an opt. substd. aryl; R1, R2 and R3 are opt. subst. monovalent hydrocarbyl; and Y is a divalent bridging gp.). Also clamined is a rhodium complex hydroformylating catalystic precursor compsn. comprising a solubilised rhodium carbonyl phosphorus acetylacetonate complex, an organic solvent and the ligands given above.
Patent KR-840002287-B1 (KR)
Title: Slide fastener chain and method of and cutter for manufacturing the same
Inventor: TAKESHIMA GIYOSHI
IPC: A44B19/02
Filed: 1982-12-20
Granted: 1984-12-15
Abstract: Slide fastener which has been prepd. from manual threading-on of a slider, has one stringer longer than the other by a distance greater than the length of a slider, so that the longer stringer has several uncoupled fastener teeth. A predetermined number of opposed teeth from the end of the shorter stringer have their heads cut off, so that these teeth are in fact sepd. Manipulation of a slider onto the coupling teeth is much simplified since leading teeth pull apart for entry into slider channels.
Patent KR-910005093-B1 (KR)
Title: Apparatus for reproducing an information signal
Inventor: YONEYAMA SIGEYUKK
IPC: H04N5/76
Filed: 1983-01-21
Granted: 1991-07-22
Abstract: A reproducing section of a helical scan VTR for reproducing a color television signal recorded in a plurality of successive parallel tracks on a magnetic tape and comprised of a video signal and at least one of a frequency-modulated audio signal and the combination of a PCM audio signal and run-in signal, with the video signal and frequency-modulated audio signal being recorded only in a main section of each track and the PCM audio signal being recorded only in an overscan section of each track, the VTR including a pair of magnetic heads which scan the tracks to reproduce the information signal recorded therein; a pair of switch circuits connected to the heads and which separate the information signal reproduced during scanning of the main section of each track and a signal reproduced during scanning of the overscan section of each track; a detector which detects the presence or absence of a run-in signal from the separated signal reproduced during scanning of the overscan section of each track and produces a detection signal in response thereto; an output; and a switch for switching an analog audio signal reproduced from the PCM audio signal to the output in response to the detection signal when a run-in signal is detected and an analog audio signal reproduced from the frequency-modulated audio signal to the output in response to the detection signal when no run-in signal is detected.
Patent KR-920001166-B1 (KR)
Inventor: ISHIMOTO JENIJI
IPC: A63H17/36
Filed: 1983-03-04
Granted: 1992-02-06
Abstract: 내용 없음.
Patent KR-840002311-B1 (KR)
Title: The method of rain shoes
Inventor: LEE BONG-SHIN
IPC: A43B13/02
Filed: 1983-06-01
Granted: 1984-12-19
Abstract: An improved manufacturing process for one-body rain shoes is described. A latex soln. (4) is poured into the protruding parts (3) of the lowered sole (2) of an aluminum mold (1), and is heated at 80≰C. The latex soln. is additionally poured up to the uppermost part of (3), and is fixed for 10-15 secs. to give a solidified latex layer. The shoe surface (6) is made in the upright state of the mold, and is heat-treated at 120-130≰C in an oven.
Patent KR-850001409-B1 (KR)
Title: Method for preparing chemical pulp by using urea alkali digesting solution
Inventor: KU JA-UN
IPC: D21C1/00
Filed: 1983-07-14
Granted: 1985-09-30
Abstract: Chemical pulp is prepared from wood chips using a digestion soln. containing 18% sodium hydroxide and 1-4% urea (NH2CONH2), and replacing sodium sulfide (Na2S) to remove emission of pollutant gases, such as NaSH or mercaptan(CH3SH). This method has a somewhat lower pulp yield, higher rupture stregth, higher tensile strength, and a higher degree of whiteness than the Kraft (or sulfate) process.
Patent KR-920002649-B1 (KR)
Inventor: HARRISON KENNETH J
IPC: C09K19/60
Filed: 1983-08-18
Granted: 1992-03-31
Abstract: 내용 없음.
Patent KR-860000731-B1 (KR)
Title: Epoxy resin compositions
Inventor: KIM YONG-DOK
IPC: C08K5/34
Filed: 1984-02-20
Granted: 1986-06-14
Abstract: Epoxy resin composition comprises hardener(I) prepared by reaction between guanamine compd. dibasic acid and organic phosphate ester(II) ; where R1 = C1-3 alkyl or benzene ring; R2 = C4-12  saturated aliphatic hydrocarbon; and n = 1 - 5. Blending ratios of (I) and (II) per 100 parts epoxy resin are 5 - 30 parts and 0.05 - 0.5 parts, respectively. The product has high crack resistance, thermal resistance, and impact strength.
Patent KR-890004797-B1 (KR)
Inventor: SIRADO TAKEHITE
IPC: H01L21/8238
Filed: 1984-11-09
Granted: 1989-11-27
Abstract: 내용 없음.
Patent KR-910005562-B1 (KR)
Inventor: CREASEY JACK R
IPC: C08L25/00
Filed: 1984-11-24
Granted: 1991-07-31
Abstract: 내용 없음.
Patent KR-870001389-B1 (KR)
Title: Ribbon cartridge with endless tape for thermal printer
Inventor: AN CHANG-SHIK
IPC: B41J32/00
Filed: 1984-12-20
Granted: 1987-07-25
Abstract: Hubs (2,3), having rollers (4,5) are provided in the cartridge.  A thermal head (12) is provided on one side portion, and an endless ribon, which has a base layer and a ink layer, circulates the thermal head.  A magnetic ring (6) is assembled on one hub (2) and a toner container (8) is made to deliver the inkparticles.  A heating head (9) is provided between the hubs, and a pressing roller (10) is provided on the roller (5) of the other hub (3).
Patent KR-930009249-B1 (KR)
Inventor: GENEST BERNARD
IPC: C09K5/04
Filed: 1985-06-29
Granted: 1993-09-24
Abstract: 내용 없음.
Patent KR-870000492-B1 (KR)
Title: Space portion processing method and apparatus for slide fastener chain
Inventor: KUSE KAZUKI
IPC: A44B19/60
Filed: 1985-08-20
Granted: 1987-03-12
Abstract: A slide fastener chain (1) is gapped by cutting away a length of its plastic-coil coupling elements, for the gap region to receive parts of a separable end stop, such as pin-box(13,15) and separable pin (17), the coupling elements being stitched (11) to core cords(9). The chain is pre-processed to receive the end stop fitting by a single press, which simultaneously press-forms the core cords(9) and fuses (5) the coupling elements cut ends into the stringer tapes(7), the gap being detected as the chain is advanced, and specifically arrested by an overhead stopper which enters the gap under control of a gap detector.
Patent KR-890000712-B1 (KR)
Title: Irregulor weaving part's protecting apparatus
Inventor: I WON-SHIG
IPC: D03D51/08
Filed: 1986-02-13
Granted: 1989-03-27
Abstract: This invention relates to an interruption-traces preventing apparatus prepared for the case of an unexpected interruption of weaving process in weaving machine for 15 minutes or more.  In the weaving machine an L-shape press actuator is arranged on a tension controlling bar.  The corner of the press actuator is attached to a supporting pin by a hinge.  The actuator has a pipe-type balance wieght around the long part of the L-shape actuator, which has a scale.  A pulling bar links the lower end of an actuator bar and the upper end of the short part of the L-shape actuator.  A boomerang shape actuator contacts to the end actuator bar on a projection of it.
Patent KR-930009443-B1 (KR)
Inventor: MATSUMOTO KEIKO
IPC: C07D405/12
Filed: 1986-03-14
Granted: 1993-10-04
Abstract: 내용 없음.
Patent KR-890001087-B1 (KR)
Title: Feeds for alluring fishes in a weir
Inventor: LEE SUNG-HO
IPC: A01K69/06
Filed: 1986-07-11
Granted: 1989-04-24
Abstract: A method for preparing a durable fish bait is presented. Thus, crushed fish contg. M2O.nAl2O3 or M2O.nSiO2 in a fish trap attract fish for 20-72 hrs by releasing sustained fishy smell.
Patent KR-930009499-B1 (KR)
Title: Rotary vortex separator for a heterogeneous liquid
Inventor: LECOFRE YVES
IPC: B04B1/02
Filed: 1986-12-31
Granted: 1993-10-06
Abstract: A rotary vortex separator for heterogeneous liquids, e.g. water with a small oil content on an offshore oil platform, includes injection channels (30) which inject water to be de-oiled at an axial speed relative to the periphery of the separator at the upstream end (4) of a cylindrical separation chamber (2) rotating about its axis (8). Purified water leaves from the other end (6) of said chamber via an annular outlet opening (26) of smaller radius to constitute a free vortex type of flow. The oil is removed by an axial tube (28).
Patent KR-960000378-B1 (KR)
Inventor: CHUAN-CHUNG CHANG
IPC: H01L21/318
Filed: 1985-11-13
Granted: 1996-01-05
Abstract: 내용 없음.
Patent KR-940004927-B1 (KR)
Title: Method of constructing and recording list of recorded data in postscript type optical disk
Inventor: INSHIWATA KOJI
IPC: G11B27/22
Filed: 1986-03-28
Granted: 1994-06-07
Abstract: PCT No. PCT/JP86/00152 Sec. 371 Date Jan. 21, 1987 Sec. 102(e) Date Jan. 21, 1987 PCT Filed Mar. 28, 1986 PCT Pub. No. WO86/05916 PCT Pub. Date Oct. 9, 1986.In constructing a list of recorded data recorded onto a disk (4), a point of starting the recording of finally recorded data is found from time record data of the final record, and the preceding data area is sought to find a point of starting the recording of the data. The seeking operation is repeated to construct the list within short periods of time on a time table under a system controller (1). The list thus prepared is then recorded onto a list-recording area of the disk (4).
Patent KR-950003498-B1 (KR)
Inventor: BRINDOEPKE GERHARD
IPC: C08G71/00
Filed: 1987-01-10
Granted: 1995-04-13
Abstract: 내용 없음.
Patent KR-920009992-B1 (KR)
Title: Corrosion resistant coating
Inventor: TUTTLE JR JAMES N
IPC: C23F11/18
Filed: 1987-05-08
Granted: 1992-11-10
Abstract: A process for improving the corrosion resistance of an iron or steel part having a phosphate conversion coating, said method comprising contact of said part with a solution containing ions selected from the group of cobalt ions and nickel ions. Preferably, the solution also contains stannous ions. Contact may be by immersion or spraying.
Patent KR-960014997-B1 (KR)
Title: Electrical transdermal drug applicator system
Inventor: SIBALIS DAN
IPC: A61N1/30
Filed: 1987-07-16
Granted: 1996-10-23
Abstract: A transdermal applicator system for passing at least one drug for delivery to the systemic circulation system of a patient through the skin (24), comprising a drug reservoir (12, 14) containing a colloidal suspension having at least one drug in a fluid medium for delivery to the body of the patient, voltage means for imposing electrostatic field lines (36) upon said medium so as to create a non-uniform electrostatic field in said medium when placed on the skin (24), the drug particles (34) migrating in accordance with the principle of dielectrophoresis through the skin (24).
Patent KR-890004510-B1 (KR)
Title: Hand-held vibractory massager
Inventor: IWAMOTO HIRONORI
IPC: A61H23/02
Filed: 1987-08-20
Granted: 1989-11-10
Abstract: A portable massage vibrator head (20) flxibly coupled to the end of the long handle (10) can move always relatively within limits off a motor (40) in the head whose drive shaft forms the head center axis and is fitted with a centrifugel weight (50) to vibrate the revolving head.  A counter-weight (60) in the head is so mounted that the center of gravity (Mc) of the head and that (Mf) of the centrifugal weight lie in one plane ar right angles to the head center axis.  The counterweight and the centrifugal weight are positioned to prevent countervibration in handle and so to reduce operator fatigue.
Patent KR-900004734-B1 (KR)
Inventor: YUN JU-YOUNG
IPC: H01L29/78
Filed: 1987-08-27
Granted: 1990-07-05
Abstract: 내용 없음.
Patent KR-930004839-B1 (KR)
Inventor: ETEMAD SHAHROKH
IPC: B23Q15/00
Filed: 1987-10-17
Granted: 1993-06-09
Abstract: 내용 없음.
Patent KR-960016901-B1 (KR)
Inventor: VOORMAN JOHANNES O
IPC: H03H11/04
Filed: 1987-11-13
Granted: 1996-12-26
Abstract: 내용없음
Patent KR-900003430-B1 (KR)
Inventor: IWASAKKI KACHUHITTO
IPC: H01J29/18
Filed: 1986-07-15
Granted: 1990-05-18
Abstract: 내용 없음.
Patent KR-900008835-B1 (KR)
Inventor: BORCHERT WERNER
IPC: B01D29/25
Filed: 1986-11-17
Granted: 1990-11-30
Abstract: 내용 없음.