baber/WOPTO huggingface dataset:
Patent KR-860000642-B1 (KR)
Title: Heatable winding drum
Inventor: HAWERKAMP MANFRED
IPC: B29C53/82
Filed: 1983-03-30
Granted: 1986-05-28
Abstract: A heatable winding drum is used to make a spiraly winding tube and vessel. It is made of winding strip material of heatplasticity. This heatable winding drum consists of a roundshaped drum wall, a supporter in the drum wall and a insulation layer between the supporter and the drum wall. The insulation ring is fixed between a round-shaped wall ring and drum wall. The supporter includes a spring having a coating layer on the circumference. The supporter consists of a supporting ring and a spacer.
Patent KR-910005411-B1 (KR)
Title: Process for preparing n-substituted urea
Inventor: MEYER WILLY
IPC: C07C309/87
Filed: 1983-09-01
Granted: 1991-07-29
Abstract: The invention relates to N-phenylsulfonyl-N'-pyrimidinylureas and N-phenylsulfonyl-N-triazinylureas of the general formula    <IMAGE> (I)  wherein R1 is hydrogen, halogen, nitro, amino, C1-C5alkyl, C1-C4haloalkyl or a -Q-R7, -CO-OR8 or -(CO)n-NR9R10 radical, R2 is hydrogen, C1-C4alkyl, C1-C4alkoxy, C1-C4alkylthio, C1-C4haloalkyl, C1-C4haloalkoxy, halogen or alkoxyalkyl containing not more than 4 carbon atoms, R3 is C2-C10alkenyl which is substituted by one or more fluorine or bromine atoms or by one or more hydroxyl, cyano, nitro, -(Y)m-CO-(Z)n-R8, -SO2-NR11R12, -S(O)p-C1-C3haloalkyl or -S(O)n-C1-C3alkyl groups and which may additionally be substituted by one or more chlorine atoms, R4 is C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy or C1-C3haloalkoxy, R5 is hydrogen, halogen, -NR13R14, C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy or C1-C2haloalkoxy, R6 is hydrogen, C1-C3alkyl or C1-C3alkoxy, X is oxygen or sulfur, and E is nitrogen or the methine group, and R7 is C1-C4alkyl which is substituted by halogen or C1-C3alkoxy or is C3-C5alkenyl, R8 is C1-C4alkyl, C1-C4haloalkyl or C2-C6alkoxyalkyl, R9, R10, R11, R12, R13 and R14, each independently of the other, are hydrogen or C1-C3alkyl, Q is oxygen, sulfur, the sulfinyl or sulfonyl bridge, Y is oxygen, sulfur or -NR16-, wherein R16 is hydrogen or C1-C3alkyl, Z is oxygen, sulfur or -NR17-, wherein R17 is hydrogen or C1-C3alkyl, m and n are each 0 to 1, and p is 0, 1 or 2, and to the salts of these compounds with amines, alkali metal bases or alkaline earth metal bases. These compounds have good pre- and postemergence selective herbicidal and growth regulating properties.
Patent KR-890005030-B1 (KR)
Title: Zoom lens
Inventor: OKUDAIRA SADAO
IPC: G02B15/16
Filed: 1983-12-31
Granted: 1989-12-06
Abstract: The zoom lens comprises in order from the object, one lens group with a positive refractive power, a second lens group with a negative refractive power, a third lens group with a positive refractive power and a fourth lens group with a positive refractive poewr.  All the lens groups are independently moved in an axial direction to vary the overall focal length.
Patent KR-920010002-B1 (KR)
Inventor: OTTO NEIL C
IPC: H01M4/66
Filed: 1984-02-04
Granted: 1992-11-10
Abstract: 내용 없음.
Patent KR-860001683-B1 (KR)
Title: Roller bearing unit for linear slide
Inventor: TERAMACHI HIROSHI
IPC: F16C29/06
Filed: 1984-05-25
Granted: 1986-10-17
Abstract: The machine tool machining center has a track shaft extending in the longitudinal direction of the linear slide roller bearing and having loaded roller rolling surfaces respectively formed on both side surfaces of each of the right and left ridges projecting in the direction of an imaginary oblique line intersecting the horizontal axis at an angle of about 45 degrees. The linear slide roller bearing has a movable table constituted by a long block which straddles the track shaft. The movable table has longitudinal recesses respectively formed on the opposing surfaces of skirt portions.
Patent KR-860000426-B1 (KR)
Title: Manufacturing of soap of floating in water and apparatus therefor
Inventor: SONG CHANG-MUK
IPC: C11D13/14
Filed: 1984-06-21
Granted: 1986-04-19
Abstract: Soap floating in water was manufd. from sodium salt of fatty acid(I) or mixt. of (I) and potassium salt of fatty acid in melt state contg. 17% moisture by introducing air, by cooling to 55≰C to maintain in semi-melting state, by agitating mechanically the semi-melted soap at 200 - 420 rpm under the controlled temp. of 20≰C, and by extruding at 75≰C. The appts. comprises heat exchange (1) for cooling and agitating the mixt. of melted soap and air and soap crystal converter(3) for heating and extruding at proper temp.
Patent KR-860000775-B1 (KR)
Title: Gear apparatus of timber or thin steel material
Inventor: YANG DONG-RYOL
IPC: G01L25/00
Filed: 1984-06-28
Granted: 1986-06-23
Abstract: The upper and lower friction drums(1)(2) are fixed by pins(6)(7) at the fixed plate(3). These drums(1)(2) are combined by a pair of bolts(13)(14) through holes(12) formed at the center of the fixed plate(3). The bolts(13)(14) are connected by a spring(15). The friction drums(1)(2) take the free rotation around the circumference of the fixed pins(6)(7). The back sides of friction drums(1)(2) have screw connection openings(10)(11) with a constant length. This apparatus has a perfect grip effect and no fracture of grip under a tensile test.
Patent KR-920007521-B1 (KR)
Inventor: BATHGATE RAYMOND J
IPC: C08L21/00
Filed: 1984-06-30
Granted: 1992-09-05
Abstract: 내용 없음.
Patent KR-880000119-B1 (KR)
Title: Circuit of time signal by a digital clock
Inventor: SHIN SUK KYUN
IPC: G04C21/00
Filed: 1985-03-26
Granted: 1988-03-12
Abstract: In the invention, a digital clock for giving time signals is provided with a detector (1) and a pulse generator (2) responding to the detector output and is connected with selector (4) for time setting and a logic section (5) and a counter (3) for automatic resetting function by a delay (31) via the time signal output K, whose speaker (7) is open at one end for giving an arbitrary function but connects via a means with a switching section (6) for actuation by the output of the logic sect..
Patent KR-930010030-B1 (KR)
Inventor: JOBLING DAVID T
IPC: H04N5/14
Filed: 1985-06-04
Granted: 1993-10-14
Abstract: 내용 없음.
Patent KR-900000767-B1 (KR)
Title: Overheat preventing system of a.c. motor
Inventor: DAKATA NOBUHARU
Filed: 1985-07-22
Granted: 1990-02-15
Abstract: When the opening signal to the inlet vane of a controller exceeds the threshold set to the first detector at the low speed operation time, the first detector delivers a signal for a predetermined period, the contact is closed and another contact is opened.  A coil receives no voltage to open a switch and close the contact.  The signal thus performs the same effect when the pushbuttom automatically switches to high speed operation.  When the second detector delivers a signal for a predetermined period, one contact is closed and another opened.
Patent KR-900007516-B1 (KR)
Title: Rolled plate sectional profile control rolling method and rolling mill
Inventor: YARITA IKUO
IPC: B21B37/34
Filed: 1985-12-19
Granted: 1990-10-11
Abstract: Sectional profiles of rolled steel plates are controlled by rolling between work rolls having conical tapering ends, mounted one above the other. Each roll has a steeply tapered end and a shallow tapered end, mounted such that a steep end and a shallow end are coincident. The ratio of tapers is larger than 1 and less than (10). Plates are rolled by one tapered end and one flat drum, and the taper of both rolls. Work rolls move axially relative to each other such that plate edges are rolled by at least one tapered roll. Appts. comprises a rolling mill having a pair of tapered work rolls axially movable, backup rolls and mill housing.
Patent KR-900005234-B1 (KR)
Title: Semiconductor integrated circuitry
Inventor: UMEDA YASCHI
IPC: G06F15/78
Filed: 1986-02-01
Granted: 1990-07-21
Abstract: A semiconductor integrated circuit device, other than a microprocessor in the form of an integrated circuit, which comprises a circuit means for receiving an external clock signal and normally transmitting it as an internal clock signal, the circuit means also receiving an externally applied signal and a signal internal to the device, and responding to a predetermined state of the externally applied signal to interrupt the transmission of the clock signal, so as to reduce the power consumption of the device by removing the internal clock signal, when the signal internal of the device is in a first state and not when the internal signal is in a second state.
Patent KR-900005669-B1 (KR)
Title: Motor drive device
Inventor: SUKANUMA ATZUSI
IPC: G11B15/467
Filed: 1986-03-10
Granted: 1990-08-03
Abstract: A brushless motor is used for the drive to the head drum of a video recorder. The motor has a stator plate (6) to which a Hall effect device (12) is fitted. This device interacts with a rotor plate (11) fixed to a cup-shaped housing (9) supported on bearings on a spindle. The rotor plate is produced from magnetic segments of alternating polarity and interacts with the Hall effect device to provide a commutation system for the motor.
Patent KR-890004025-B1 (KR)
Title: Method for cultivation of protoplast
Inventor: HUJIMURA DASHUHITO
IPC: A01H4/00
Filed: 1986-05-20
Granted: 1989-10-16
Abstract: The method of incubating protoplast to induce callus or cell cluster comprises: (a) putting oryza sativa cultivar, Nihonbare in 70% ethanol solution for 1 min and in sodium hypochlorite solution for 15 mins; (b) washing Nihonbare with sterilized distilled water; (c) inoculating the washed Nihonbare in agar medium containing 0.3% of casein hydrosate, 2 ppm of 2,4-D and 1 ppm of benzyladenine; (d) incubating Nihonbare at 26≰C for 3 weeks; (e) suspending the obtained callus in liquid medium containing 0.3% of casein hydrosate and 1 ppm of 2,4-D; (f) putting the callus in the solution containing mannitol at 27≰C for 6 hrs.
Patent KR-900002898-B1 (KR)
Title: Color cathode ray tube
Inventor: SONE DOSINAO
IPC: H01J29/02
Filed: 1986-06-20
Granted: 1990-05-03
Abstract: an envelope having a generally rectangular-shaped panel carrying a phosphor screen on its inner surface; an electron gun assembly and an apertured shadow mask within the envelope; the shadow mask being positioned close to the screen and between the screen and the gun assembly; and the mask being held around its periphery by a mask frame which has a plurality of spring supports by which the frame is secured to stud pins projecting inwardly from the wall of the envelope.
Patent KR-940000534-B1 (KR)
Inventor: TANABE HISAKI
IPC: C09D167/00
Filed: 1986-07-31
Granted: 1994-01-24
Abstract: 내용 없음.
Patent KR-930012029-B1 (KR)
Inventor: FORD DOUGLAS R
IPC: B01D29/00
Filed: 1986-08-13
Granted: 1993-12-23
Abstract: 내용 없음.
Patent KR-910001757-B1 (KR)
Inventor: OKATA NORIO
IPC: C08G75/02
Filed: 1986-08-19
Granted: 1991-03-23
Abstract: 내용 없음.
Patent KR-910000400-B1 (KR)
Title: Induction apparatus and method for sealing of thermoplastic coated packing material
Inventor: HILMERSSON ANDERS
IPC: B65B51/22
Filed: 1986-08-22
Granted: 1991-01-25
Abstract: The invention relates to an arrangement for the sealing of thermoplastic-coated packing material of the type which comprises at least one layer of an aluminium foil. The arrangement comprises an inductor (13) connectable to a high-frequency source of current which is constituted of a U-shaped loop of electrically conducting material. The legs of the U-shaped loop are parallel and are situated close to each other, and the inductor (3) comprises between its legs a core (10) of ferrite material. The said core of ferrite material has local inserts (11) of ferrite material of substantially higher permeability than the surrounding portions of the core (10) and the local inserts (11) are installed in regions of the sealing arrangement where strong local heating is required in the sealing joint or where the sealing pattern needs to be influenced.
Patent KR-880000204-B1 (KR)
Title: Sulphonyl urea derivative
Inventor: J J HOWBERT
IPC: C07D319/18
Filed: 1986-09-22
Granted: 1988-03-12
Abstract: Sulfonyl urea derivs. (I) are new.  A= -O-, -NCH3, -CH2-, or -CH2O-; D= -CH2- or -O-; R1=H or halo; R2=halo.  Add 1N NaOH 490 ml to acetone 300ml contg. 2,3-dihydro-5-indenyl sulfonamide 93.2g, add acetone 250ml contg. 4-chlorophenylisocyanate 79.36g to the rxn. mixt. with stirring, stir for 18hr at room temp. and filter, add 1N HCl 490ml to the filtrate for obtg. fine-white ppte. and filter to give 144.86g of N-⇔(4-chlorophenyl) amino! carbonyl!-2,3-dihydro-1H- indene-5-sulfonamide(m.p.=169-172 deg.C). (I) are useful for treating tumours.
Patent KR-900002583-B1 (KR)
Title: Magnetic recording carrier
Inventor: PYO MUN-SUNG
IPC: G11B5/708
Filed: 1986-09-29
Granted: 1990-04-20
Abstract: Org. polysiloxane cpds. [(I), 0.1-10 wt.%  are contd. in magnetic recording carrier to improve lubrication and durability of the magnetic carrier.  In (I), Z= R1CO R2-(O-CH2-CHR3-)n; R1= C7-17 (un) satd. monovalent hydrocarbon; R2= C6-18 (unsatd. monovalent hydrocarbon; R3= H or Me; Rf= C1-8 perfluoroalkyl; l= 1-100; m= 1-50; n= 1-20.
Patent KR-900006772-B1 (KR)
Title: Method for making semiconductor device free from electrical short circuits through a semiconductor layer
Inventor: SUNBEY YAMAJAKI
IPC: H01L31/20
Filed: 1986-11-05
Granted: 1990-09-21
Abstract: In mfr. of a semiconductor device, partic. photovoltaic device, a tramsparent electrode (2) is formed and patterned on a substrate and semiconductor layer (3) is formed on the electrode, a number of gaps and pinholes (6,6') being unintentionally produced. The layer is coated with a photocurable resin to holes (7,7'). The semiconductor layer is irradiated from the glass substrate side, selectively curing the resin in the holes. Uncured resin is then removed, and mfr. of the device is continued.
Patent KR-950000922-B1 (KR)
Inventor: HENNON ERIN D
IPC: F16C35/067
Filed: 1986-12-01
Granted: 1995-02-03
Abstract: 내용 없음.
Patent KR-940005316-B1 (KR)
Inventor: WIJMA WILLEM S
IPC: B26B19/16
Filed: 1986-12-20
Granted: 1994-06-16
Abstract: 내용 없음.
Patent KR-940008825-B1 (KR)
Inventor: GEMIGNANI ANDRE
IPC: F15B13/042
Filed: 1987-03-13
Granted: 1994-09-26
Abstract: 내용 없음.
Patent KR-900001467-B1 (KR)
Title: Portable electro-circuit testing apparatus
Inventor: PARK CHONG-GUK
IPC: G01R31/28
Filed: 1987-08-22
Granted: 1990-03-12
Abstract: The tester tests the connection or logical operation states of the electronic parts with a display as well as an audio sound. The tester includes a logic level discriminator (1) for classfying the testing logic device to TTL or CMOS one, a resistance discriminator (2) for measuring the resistance of the testing device, a test mode selection switch (SWA) for selecting the test mode from the resistance or logical device mode, a lamp circuit (5) for turning on or off the lamp according to the pulse provided from a pulse input detection circuit (4), and a oscillation control circuit (6) for providing the audio sound when the testing device is faulty.
Patent KR-910009645-B1 (KR)
Inventor: MURATA TSUNEO
IPC: H04N1/00
Filed: 1987-12-19
Granted: 1991-11-23
Abstract: 내용 없음.
Patent KR-900005356-B1 (KR)
Title: Burid source type dynamic semiconductor memory device
Inventor: RYU HUN-KYU
IPC: H01L27/108
Filed: 1987-12-24
Granted: 1990-07-27
Abstract: The memory device has cells in which the source electrode is buried inside a trench capacitor. The device is prepared by sputterig a BPSG (borophospor silicate glass) thin film (41), etching it to form a first trench (27), forming a predetermined patterm filling a first polysilicon (40) on the inside of the first trench (27), sputtering a second polysilicon (37), forming a pattern of the second trench; sputering a third polysilicon; and implanting As ions of 5 x 1015 cm-2 to form a drain (35) and buried source (33).
Patent KR-950000980-B1 (KR)
Title: Bismaleimide siloxanes and process for their preparation
Inventor: BARTHELEMY PASCAL
IPC: C08G73/12
Filed: 1988-02-24
Granted: 1995-02-06
Abstract: Novel diorganopolysiloxylated bis(maleimides) which are readily converted into improved heat-stable polymers have the following general formula (I):    <IMAGE>  (I)
Patent KR-970011057-B1 (KR)
Title: Dram trench cell and method of manufacturing thereof
Inventor: PARK YOUNG-JOON
IPC: H01L29/10
Filed: 1988-03-31
Granted: 1997-07-05
Abstract: The present invention relates to a method of making a microscopic pattern by using a scanning tunneling microscope (STM). This method includes the steps of stabilizing a GaAs surface for preventing formation of oxide layer; applying a given pulse voltage to a scanning tunneling microscope (STM)'s metal tip (10) approaching the GaAs surface, and forming the GaAs surface with sulfur atoms in a desired pattern (20); reacting the GaAs surface with oxygen in the air to form an oxide layer (30) in a given pattern; forming a microscopic pattern with the oxide layer (30) only by removing the sulfur atoms with heat in vacuous state.
Patent KR-970011005-B1 (KR)
Title: Fuctionalized polyamine chelants and rhodium complexes thereof and process for their preparation
Inventor: KRUPER JR WILLIAM J
IPC: A61K47/48
Filed: 1988-06-24
Granted: 1997-07-05
Abstract: A group of functionalized polyamine chelants that form complexes with rhodium are disclosed. The rhodium complexes can be attached to an antibody or antibody fragment and used for therapeutic or diagnostic purposes.
Patent KR-950005761-B1 (KR)
Inventor: HASHIMOTO NOBORU
IPC: C01B21/072
Filed: 1988-08-23
Granted: 1995-05-30
Abstract: 내용 없음.
Patent KR-950001241-B1 (KR)
Title: Circuit for automatically selecting music in tape recorder
Inventor: LEE KYU-AN
IPC: G11B27/10
Filed: 1988-12-20
Granted: 1995-02-15
Abstract: The device provides an efficient method of listening music by playing a prelude of every songs which are contained in the tape. The device includes (A) a timer to reproduce a prelude of the music during a fixed time; (B) the first switching block to provide the selected signal to the automatic selection circuit after a set time; (C) the second switching block to operate the timer after the automatic prelude selection. The timer includes (i) a clock generator; (ii) a divider which generates the select signal for every fixed time; (iii) and a flipflop which provides the divider output signal to the first switching block.
Patent KR-910004921-B1 (KR)
Title: Black resin composite for communication cable cover
Inventor: LEE SUNG-HYUNG
IPC: H01B3/30
Filed: 1989-03-31
Granted: 1991-07-18
Abstract: The black resin compsn. for coating  telecommunication  cable comprises: polyolefinic resin as base resin; carbonblack; one  the cpd.,    as    antioxidant,    of      3.5-di-tert-butly-4-hydroxy hydrocinnamate,     pentaery     thrityl-tetrakis      (3-(3,5- ditert-butyl-4-hydroxy        phenyl)-propinate),        thiodiethyl bis-(3,5-di-tert-butyl-4-hydroxy)-                 hydrocinnamate, di-betanaphathyl-p-phenylene-diamine;   ethylene   vinyl   acetate copolymer as the  weather  resistant  shear  crack  modifier;  and neoalkoxy cpd. of formula (I) as the surface  treating  agent.  In formula, M= Ti, Zr; R, R1 and R3 are each  of  one  selected  from C1-20 alkyl, alkenyl, alkynyl, aryl or alkaryl or halogen or ether substd. thereof; a+b+c=3.
Patent KR-910003089-B1 (KR)
Title: Method and apparatus for making glass particles
Inventor: LEE HUN-SHIK
IPC: C03B37/022
Filed: 1989-05-29
Granted: 1991-05-18
Abstract: The  apparatus  for  making  glass  particles  comprises   a glass- melting furnace (1) containing the melting glass (2) of  103 poise to make 1-10 mm particle size, a shute (4) at  an  angle  of 25-45 degrees catching the melting-glass dropping through  orifice ring (3) and having vibrator  (7)  and  water-spraying  valve  (8) applyed water by cooling tower (13), a vibrating conveyer (9) with mesh belt (5) of 200 mesh at the below, a hopper (6) storing glass particles on the conveyer, a water tank (11) with a pump (12)  and a cooling twer (13) locating at the below of mesh belt.
Patent KR-920000358-B1 (KR)
Title: Laser diode manufacture method of high confidence burried type
Inventor: KIM SANG-BAE
IPC: H01S5/00
Filed: 1989-09-02
Granted: 1992-01-11
Abstract: The method for manufacturing  a  laser  diode  comprises  the steps of forming an intermediate layer (7), an active layer (6) nd a clad layer (5) sequentially by using a first LPE method to  form a double hetrostructure; forming an etching mask (9)  thereon  and etching the  double  heterostructure  to  form  a  vertical  mesa structure; selectively etching the clad  and  intermediate  layers (5)(7)  such tht  the  active  layer  (6)  forms  a  convex  mesa structure; nd remelting the convex layer (6) by using the balanced or oversaturatd solution, in the second LPE  growing  for  forming current   blocking   layers   (3)(4).   The   method    simplifies manufacturing processes and raises the yield.
Patent KR-930006231-B1 (KR)
Inventor: MACHIDA SATOSHI
IPC: H03K19/00
Filed: 1989-09-29
Granted: 1993-07-09
Abstract: 내용 없음.
Patent KR-0143236-B1 (KR)
Title: Injection molding machine
Inventor: KAMADA KOICHI
IPC: B29C45/38
Filed: 1989-09-30
Granted: 1998-07-15
Abstract: An injection molding machine employing a mold for molding, e.g., disk-shaped recording medium carriers. A mold-mounting plate (1) has a front surface allowing the mold to be the mounted thereon. A gate-cutting punch (4) is slidably inserted in a hole extending through the plate (1) and opening in the front and rear surfaces of the plate (1). A bore extends longitudinally in the center of the punch (4), and an ejector pin (5) is slidably inserted in the bore. A gate-cutting drive cylinder (6) is mounted on the rear surface of the mold-mounting plate (1), and has a piston (8) capable of abutting against the rear end of the gate-cutting punch (4). The piston(8) is formed with a stepped bore having a large-diameter front portion and a small-diameter rear portion (12) which are aligned on the same axial line. An ejector rod (13) extends through the stepped bore, and has a large-diameter portion (14) slidable within the large-diameter portion of the stepped bore, the front end of the ejector rod (13) being capable of abutting against the rear end of the ejector pin (5). A sprue-ejecting drive cylinder (18) is provided behind the gate-cutting drive cylinder (6) on the same axial line, and has a piston rod (23) connected to the rear end of the ejector rod (13). Thus, the machine includes no hydraulic cylinders incorporated in the mold, thereby eliminating various drawbacks conventionally encountered.
Patent KR-920001554-B1 (KR)
Inventor: MORI GEI
IPC: A01K61/00
Filed: 1989-12-30
Granted: 1992-02-18
Abstract: 내용 없음.
Patent KR-920006143-B1 (KR)
Title: A trunk signals detection circuit and voice communication circuit of p.a.b.x.
Inventor: MIN KYONG-HWA
IPC: H04M9/00
Filed: 1990-02-21
Granted: 1992-07-31
Abstract: The trunk and audio signal detection  circuit  detects  audio and trunk interface signals and bypasses DC  communication  signal of - 48V to reduce the size of a matching transformer. The  circuit comprises a DC coupling circuit (1) for profecting the system from over current and overvoltage and for bypassing DC current  (-48V), a ring signal detector (2) for detecting  ring  signal,  a  ground signal detector (3) for detecting ground signal transmitted from a stationary line interfacing unit according to relay on  signal  of the DC  coupling  circuit  (1),  a  polarity  reversing  detection circuit (4) drived by voltage of tip and  ring  terminalto  detect polarity reverse and hook on/off state, and a busy  tone  detector (5) for detecting busy tone.
Patent KR-930005670-B1 (KR)
Inventor: SEKIGUCHI YASUYUKI
IPC: F04B49/06
Filed: 1990-02-28
Granted: 1993-06-24
Abstract: 내용 없음.