baber/WOPTO huggingface dataset:
Patent JO-2374-B1 (JO)
Title: Stabilized hypobromous acid solution
Inventor: CILLIERS MARTHA SOPHIA
IPC: C02F1/50
Filed: 2002-03-03
Granted: 2006-12-12
Abstract: This invention relates to a method for preparing a stabilised stock hypobromous acid solution, and to a stabilised stock hypobromous acid solution. The stabilised stock solution has a hypobromous acid concentration of less than 30% (m/m) and contains an amount of cyanuric acid as a stabiliser not exceeding 1ppm. The solution may be used for treating any type of water, but has particular application in treating drinking water and irrigation water.
Patent KR-790001008-B1 (KR)
Title: Process for preventing solidification in refuse converter taphole
Inventor: JOHN ERLING ANDERSON
Filed: 1974-07-26
Granted: 1979-08-17
Abstract: A heating process for preventing blockage due to solidfication of melted metal or slag at the taphole(6) of a smelting furnace(1). The fuel in the heating taphole consisted of premixed oxygen and oil lower than chemical equivalentic combustion. Sufficient oxygen gas was used for chemical equivalentic combustion of at least 40%, so noncombustive fuel and carbon is completely combusted and the fluidity of melted metal and slag maintained. Multiplication the HHV and mass speed of the fuel is greater than 50,000Btu/hr. and caloric value of the fuel fed to the burner is less than 250,000Btu/hr/in2.
Patent KR-830000441-B1 (KR)
Title: 발진기(發振器)의 제어방식(製御方式)
Filed: 1975-04-29
Granted: 1983-03-08
Abstract: 내용 없음.
Patent KR-840000689-B1 (KR)
Title: Method of manufacturing a formed coil
Inventor: JAHODA JOHN
IPC: F28D1/04
Filed: 1979-02-14
Granted: 1984-05-18
Abstract: Method of manufacturing a formed coil having multiple single row coil cores of varying lengths.  Sheets of fins are out from plate fin stock such that the fins within each sheet are connected to each other by rupturable tabular portions.  The sheets of fins are then arranged in registration such that openings within the fins for the receipt of tubes are aligned and tubular members or hairpins may be inserted within the fins to form part of the coil.  Since the hairpins for adjacent coil rows are of different lengths, when the multiple row coil core is bent each coil row is formed about a separate radius curvature so that the formed coil will be in the desired configuration.
Patent KR-880000421-B1 (KR)
Title: Method and apparatus for controlling writing and reading of data in cassette memories
Inventor: NOZAWA RYOIJIRO
IPC: G11C19/08
Filed: 1981-09-10
Granted: 1988-03-22
Abstract: The magnetic bubble cassette memory is divided into a number of files, at the end of which a data end block (DEB) is provided. In use to store machining data for a numerically controlled machine, the data is stored in blocks of 1 bytes each.  A generating circuit provides, at the head of each data block, an eighth bit control byte (CB).  A logic one is written into the eighth bit (b8) of the control byte of a block if that block is at the head of a file.  If that block is the last one in the file, a logic one is written into the fifth bit of the control byte.
Patent KR-880001012-B1 (KR)
Title: A cathode ray tube
Inventor: SAKURAI YASUO
IPC: H01J31/20
Filed: 1981-11-19
Granted: 1988-06-13
Abstract: The device comprises a mask fixing section for affixing a shadow mask and an outer electron shield section formed on the panel skirt side w.r.t. an end portion of the mask fixing section on the panel seal surface side.  The mask fixing section and the outer electron shield section are formed integrally with each other.  The outer electron shield section comprises a fold-back portion folded back from an end portion of the mask fixing section on the panel seal surface side toward the panel fluorescent surface side, and a side wall portion extending from the fold back portion along an inner surface of a panel shirt.
Patent KR-870001803-B1 (KR)
Title: Apparatus and methods to provide shoring during the manufacturing of reefer container
Inventor: RAIDENBACH ROBERT B
IPC: F25D23/06
Filed: 1981-11-24
Granted: 1987-10-13
Abstract: An insulating foam material is introduced under high pressure into the hollow spaces in the container side walls and the ceiling.  A set of selectively movable plates are located in a fixed position for holding a container, with the movable plates forming the reinforcement of the containers outer surfaces.  A second set of selectively movable plates form the reinforcement of the interior surfaces and are attached to a movable system which is normally placed on a support platform at a second station.
Patent KR-860000656-B1 (KR)
Title: Disk reproducing apparatus
Inventor: KIGUCHI MAJIME
IPC: G11B17/049
Filed: 1982-07-07
Granted: 1986-05-28
Abstract: A clutch mechanism is disposed between a cam gear and a driving motor. The mechanism connects the gear with the motor which can transmit the driving force when the power is turned on and disconnect the motor with the gear. This causes the gear to shift the holding device from a position where the device holds a disk to a position where the disk is released from the hod. The gear then lowers a disk cradle which is connected with the gear in a position where the cradle is located above a turntable, to a position where the cradle is located below the turntable. The disc supported on the cradle is therefore laid on the turntable when the power is turned off.
Patent KR-830001442-B1 (KR)
Title: Covering material used in cultivation algae
Inventor: HARASAWA ISAMU
IPC: H03K17/56
Filed: 1982-10-25
Granted: 1983-07-29
Abstract: Ultraviolet light absorbing film to get high quality algae products and to improve the yield, is composed of a UV stabilizer≮I; R1= R2 = lower alkyl, aralkyl(optionally, R1 = side chain lower alkyl or phenyl); X = halogen, H; R3 = C8-10 alkyl≉ for PVC, polyvinylalcohol and cellulose acetate butyrate. When, the wave lengths of UV are <=240 nm, 550 nm and 240-550 nm, the light permabilities are 0-30%, >=50% and 0-95%, resp., and the thickness of film is 15-5000μ.
Patent KR-890004138-B1 (KR)
Title: Radiation-sensitive polymide precursor composition derived from a diaryl fluoronated diamine compound
Inventor: GOFF DAVID L
IPC: G03F7/037
Filed: 1983-01-04
Granted: 1989-10-21
Abstract: Title compn. comprising (a) a polymer of formula (I)[n is sufficient to provide a polymer with a number of ave. MW 1500-15000; in any partic. unit of the polymer, the arrows represent isomerism; R1 is divalent arom., alip. or cycloalip. radical contg. at least 2C; R2 and R3 are H or an org. radical (I) contg. a pholopolymerisable olefin bond, with the provision that at least one of R2 and R3 is (I) ; and R4 and R5 are C1-8 perfluoro- or perhalofluoro-alip. hydrocarbons , or alternatively a polymer of formula (II)[R6=org. group; and A and A' are chosen from H, Cl, Br and NO2 , (b) acrylate compd., and (c) initiator.
Patent KR-850001634-B1 (KR)
Title: Fluid control valve
Inventor: UENO TOYOAKI
IPC: B22D17/32
Filed: 1983-01-05
Granted: 1985-10-31
Abstract: A sliding valve had inlet and outlet for pressurized hydrautic oil, with flow bore, a sliding member plus connecting rod which moves in the bore to open/close the valve, a threaded arrangement at back of the valve to convert rotation into axial movement, and a motor to regulate rotation and hence axial movement of the sliding member. The valve is designed for an injection mould where one single such valve suffices to control the hydraulic system, controls flow acculately and rapidly and can be used for slow or high speed mould operation.
Patent KR-880001198-B1 (KR)
Title: Optical recording disc
Inventor: VRIENS LEENDERT
IPC: G11B7/243
Filed: 1983-01-12
Granted: 1988-07-02
Abstract: An optical recording disc for optically recording and reading information, comprises a substrate plate having on at least one side an ablative recording layer comprising Se, Te and an element that is not, or is only slightly, mixable with Se to Te.  The recording layer has the formula Te(x-r)Si(y+r) SzQq; where Q is Sb, Sn, Pb or Bi; x, y, z and q are at.% with x+y+z+q=100; x is 76-93; y is 6-13; z is 0- 7; q is 1-7; z+q=2-11; ris 0-3 and Q=Sb. The disc is esp. usful with infrared laser write/read.  The recording layer has a fine structure with well defined reproducible surface textrue; excellent long term physical stability high recording sensitivity.
Patent KR-900000645-B1 (KR)
Title: Smokable coherent sheet and method for its manufacture
Inventor: EKRI LASTZLO
IPC: A24B3/14
Filed: 1983-06-29
Granted: 1990-02-02
Abstract: The foil is formed under pressure between moulding elements from a mixture of plant material, binder and water, and the proudct coated with a solution or suspension containing a watersoluble, modified pectin (I).  (I) is then treated with a diand/or tri-valent metal ion and the coated film dried.  The concentration of (I) on the surface is at least 0.5(1.2-1.5) wt.%. (I) is a pectin with esterification degree below 40% and also in amidification degree over 15%.  This product has good smoking quality, enhanced filling capacity and good resistance to moisture.
Patent KR-880002698-B1 (KR)
Title: Golf club
Inventor: MASGHATI MOHAMMAD
IPC: A63B53/04
Filed: 1984-07-07
Granted: 1988-12-26
Abstract: The golf club head has weight distributed on opposite sides of a non- vertical axis (80) which extends through the centre of gravity (81) of the club head in a plane which intersects the axis (78) of the shaft above the club head to provide more accurate off-centre hits. Wooden clubs are provided with bulges and rolls which curve, respectively, about the vertical axis and an axis (86) perpendicular to it.  The radius of the roll is increased to make the loft of the club uniform from top to bottom.
Patent KR-870001354-B1 (KR)
Title: A method for determining the mixing ratio of two or more compositions employed to prepare a polymer
Inventor: HILLSHAFER DOUGLAS K
IPC: G01N31/22
Filed: 1984-10-19
Granted: 1987-07-18
Abstract: A method for determining the mixing ratio of polymers comprises (A) adding separate tracer compds.  having different compsns. to the employed polymer, (B) mixing and vulcanizing, (C) treating vulcanized polymer samples under its particles producing condns., (D) extractine an analytical amts. of separate tracer compds. by solvent system in sufficient time, (E) separating solvent from polymer particles and (G) determing the mixing ratio of polymers from (F) data.
Patent KR-900006382-B1 (KR)
Title: Flexible membrane dam
Inventor: TSEUJIYOS SHIOMI
IPC: E02B7/20
Filed: 1985-05-29
Granted: 1990-08-30
Abstract: The arrangement includes a flexible membrane weir element positioned so that when it is inflated, it will block a flow of water. The control chamber for the weir is divided into upper and lower sections. The upper section has at least a portion above ground and contains the arrangement for inflating the dam and making the weir element self supporting. The lower control section includes at least a portion positioned underground and includes an arrangement for collapsing the dam. The inflating arrangement includes a blower providing a pressure to an interior of the weir. an excess pressure prevention arrangement includes a water seal pipe limiting pressure within the weir to a predetermined amount.
Patent KR-890001451-B1 (KR)
Title: Impeller
Inventor: SUKIURA EIICHI
IPC: F04D29/24
Filed: 1986-03-25
Granted: 1989-05-03
Abstract: This invention is about a structure of an impeller for fluid machine.  The impeller is formed with a boss fit for a driving shaft and a disc having many vanes on one side.  The vanes are in the direction of the shaft and are equally spaced.  A fluid passway is formed between a rear face of a vane and a front face of a adjacent vane and from the periphery of the boss to the periphery of the disc.  The circular arcs of the rear and front faces of a vane has the same center which locates on a circle having the same center with the disc.
Patent KR-920000931-B1 (KR)
Inventor: TSUTCHIYA YASUYUKKI
IPC: C09D17/00
Filed: 1986-03-28
Granted: 1992-01-31
Abstract: 내용 없음.
Patent KR-890002703-B1 (KR)
Title: Internal combustion engine
Inventor: PARK YONG-KUN
IPC: F02B53/02
Filed: 1986-05-15
Granted: 1989-07-24
Abstract: Combustion chambers (5a,5b) consists of an intake valves (6) and outtake valves (7).  A device consists of a casing (1) having piston chamber (5) which is devided by piston (4) and power transferring means.  Four-strokes are independently performed by reciprocating motion of a piston (4) in each combustion chambers (5a,5b).
Patent KR-950000822-B1 (KR)
Inventor: VRIENS LEENDERT
IPC: H01J31/10
Filed: 1986-05-27
Granted: 1995-02-02
Abstract: 내용 없음.
Patent KR-940007932-B1 (KR)
Inventor: MONROE JAMES C
IPC: G06F17/22
Filed: 1986-06-03
Granted: 1994-08-29
Abstract: 내용 없음.
Patent KR-910003444-B1 (KR)
Inventor: HOSHINO KAZUO
IPC: C22C38/42
Filed: 1986-06-24
Granted: 1991-05-31
Abstract: 내용 없음.
Patent KR-900004752-B1 (KR)
Title: Magnetic recording carrier
Inventor: KUMIKO OJIMA
IPC: C09D127/04
Filed: 1986-10-11
Granted: 1990-07-05
Abstract: A magnetic recording medium comprises a magnetic recording layer obtd. by coating a magnetic material on a non-magnetic carrier such as  polyester film. The magnetic material contains 300 wt.% Co-contg. gamma-Fe2O3, 70 wt.% vinyl alcohol (6 wt.%)vinyl chloride copolymer, 6 wt.% Al2O3 powder, 3 wt.% fatty acid, 20 wt.% carbon black and 700 wt.% mixtd. solvent of methylethyl ketone and toluene. The medium has an excellent electron transformation property.
Patent KR-900003526-B1 (KR)
Title: Manufacture of coffin
Inventor: CHO SUNG-WOONG
IPC: B27M1/00
Filed: 1986-11-10
Granted: 1990-05-21
Abstract: The side and bottom plates of coffin are formed of waste wood scraps in a processing which has crushing, drying, mixing with adhesives, and compressed-froming. The apparatus includes deck plate (3) which has connection rod (2) of big cylinder (1), connected  to connection rods (5)(5')(5")(5'") with side compressing plates (6') (6"), bottom compressing plate (9) supported by supporting rod (8) of sliding grooves (7)(7") formed in deckplate (3), concaves (11) (11') formed in outer frames (12)(12'), inner frame (15), forming lower plate (13) , and support rail (14).
Patent KR-900008382-B1 (KR)
Inventor: SESAKI KOHOZI
IPC: C08K3/22
Filed: 1986-04-16
Granted: 1990-11-17
Abstract: 내용 없음.
Patent KR-930010890-B1 (KR)
Inventor: UJIIE KATSUMI
IPC: B65G1/04
Filed: 1987-10-30
Granted: 1993-11-17
Abstract: 내용 없음.
Patent KR-960002400-B1 (KR)
Title: Strip casting unit with down-stream multi-stand continuous rolling mill
Inventor: ROHDE WOLFGANG
IPC: B21B1/46
Filed: 1987-11-02
Granted: 1996-02-17
Abstract: A process and apparatus for making hot-rolled steel strip from a striplike continuously cast starting material uses successive processing steps in which the striplike cast starting material after solidification is brought to the hot rolling temperature and fed to a multi-stand rolling mill for rolling to the finished rolled product. A continuous casting unit supplies the multi-stand rolling mill. The rolling to the finished rolled product occurs continuously in three or four roll stands to achieve the largest possible reduction per pass. The first two roll stands operate with an approximately maximum rolling moment and a large working roll diameter.
Patent KR-960006413-B1 (KR)
Inventor: MCCREADY RUSSELL JAMES
IPC: C08G73/16
Filed: 1987-12-01
Granted: 1996-05-15
Abstract: 내용 없음.
Patent KR-900008130-B1 (KR)
Title: Process for the preparation of esters
Inventor: CHO YOUNG-MOG
IPC: C07C67/08
Filed: 1987-12-19
Granted: 1990-10-31
Abstract: A prepn. of high quality esters by reaction of alcohol and acid (anhydride) in the presece of a non acidic estest catalyst comprises vacuum-evaporating the esterificated reaction mixt. to obtain a crude ester, hydrolyzing the catalyst by adding a small quantity of water to the crude ester, neutralizing the ester with a basic cpd., and vacuum-evaporating it at 140 deg.C or less.
Patent KR-940010618-B1 (KR)
Inventor: KUWAHARA TORU
IPC: B60B35/18
Filed: 1987-12-23
Granted: 1994-10-24
Abstract: 내용 없음.
Patent KR-900003326-B1 (KR)
Title: A spinning for skin-core type conjugated spinning
Inventor: KIM KYUK-HYUN
IPC: D01D5/30
Filed: 1987-12-28
Granted: 1990-05-14
Abstract: The improved composite yarn extruding spinneret is used for especially spinning sheath-core type two components composite yarn. The spinneret is designed that the single (sheath) component from extrusion hole in internal body is extruded out and the island (core) -sea (sheath) doubled components from extrusion hole in outer body is extruded out. The multi-composite filament yarn is composed of the sheath type mono component filament in the core part and the sheath- core bicomponent filament on the outer part.
Patent KR-930008718-B1 (KR)
Title: Tv multi-voice sound delay circuit
Inventor: LEE CHANG-JUN
IPC: H04N5/60
Filed: 1987-12-30
Granted: 1993-09-13
Abstract: The circuit includes; a logic  control  section  providing  a second control signal to respond to the selected  bilingual  mode; the 3th and 4th switches switching and charging the paths, through which the outputs of the first and second magnifiers are delivered by the second control signal; and the main  and  sub  voice  delay circuits delaying the outputs of the first and  second  magnifiers in turn for the predetermined time.
Patent KR-950001096-B1 (KR)
Inventor: THOMAS BRUCE A
IPC: B23K26/10
Filed: 1987-03-25
Granted: 1995-02-11
Abstract: 내용 없음
Patent KR-960005399-B1 (KR)
Title: Video recorder providing for slant track recording
Inventor: SCHUTZE HERBERT
IPC: H04N5/782
Filed: 1988-01-15
Granted: 1996-04-24
Abstract: Video recorder with helical-track recording in which several segments of a frame are divided over several helical tracks. The segments of several successive frames are recorded in a modified order. The result is that with an increased longitudinal speed of the magnetic tape, all segments of a frame can be scanned in each case.
Patent KR-910008305-B1 (KR)
Inventor: AUERBACH ROBERT A
IPC: C09J123/16
Filed: 1988-01-22
Granted: 1991-10-12
Abstract: 내용 없음.
Patent KR-900004138-B1 (KR)
Title: Measuring apparatus for blood pressure
Inventor: DAKAHASHI MASAKAZU
IPC: A61B5/022
Filed: 1988-04-20
Granted: 1990-06-16
Abstract: The measuring device (1) for blood pressure comprises a blood pressure measuring portion (2) and a holder pipe (3). The blood pressure measuring portion allows searching for a location of an artery appropriate for a blood pressure measurement and detecting a pulse by being pressed on a skin surface above or near the artery. A plastics part blocks a blood stream, with detector for blood pressure and an indicator (5) for a measured value of blood pressure. A detected pulse of the artery is detected appropriate for measurement. The blood pressure measuring portion (2) is mounted slidably on the holder pipe and the holder pipe (3) equipped removably with a strap (4) for fixing the holder pipe.
Patent KR-910007530-B1 (KR)
Inventor: NITA TZNEO
Filed: 1988-10-06
Granted: 1991-09-27
Abstract: 내용 없음.
Patent KR-910004763-B1 (KR)
Title: Linear motor using automatic feeding system
Inventor: LIM DAL-HO
IPC: B65G47/46
Filed: 1988-10-18
Granted: 1991-07-13
Abstract: The system for  conveying  cargo  materials  in  an  optional direction, includes a cargo handling pallet  driven  by  a  linear motor and an endless track for circulating  cargo  materials.  The system comprises pallets (5), for  loading  cargo  objects,  which have  lower  or  upper  electro-conductive   materials   (51)(52); carriage device (1) having rails (31a,31b) for supporting  pallets a linear motor unit and a stopping/ positioning unit at the  lower wall between rails,  detecting  sensors  at  the  rail  or  cargo; operation circuits for  controlling  moving  or  stopping  of  the linear motor unit; a lifter device for positioning the  pallet  at upper rail (31a) and moving it up or down, which is operated by  a detecting sensor.
Patent KR-950002313-B1 (KR)
Title: Receiving mode automatic changing method for fax
Inventor: CHA BONG-HUN
IPC: H04N1/32
Filed: 1988-10-21
Granted: 1995-03-16
Abstract: inputting auto receiving start and completion time so as to convert to operation mode requested by a user; setting the auto receiving mode by enabling a ring detector when the facsimile is between the auto receiving start time and the completion time, and setting the manual receiving mode by disabling a ring detector when the facsimile is not between the auto receiving start time and the completion time, thereby automatically receiving information in the absence of the user.
Patent KR-920000633-B1 (KR)
Title: Manufacturing methods of pnp transistor
Inventor: LEE CHANG-HYEN
IPC: H01L29/70
Filed: 1988-12-20
Granted: 1992-01-17
Abstract: The method for manufacturing  PNP  transistor  comprises  (a) forming a open base by diffusing P type inpurity (14C) between the base (15) and the collector of  PNP  transistor,  (6)  forming  an emitter by diffusing n+  inpurity  (16)  into  the  above  P  type inpurity, and (C) earthing the emitter onto the P type  substrate. This  newly invented  method   can   improve   positive   current characteristics of input terminal on  the  circuit  for  designing very high input voltage circuit.
Patent KR-0141698-B1 (KR)
Inventor: RUCAS HOISFLRER
IPC: G11C16/30
Filed: 1989-02-08
Granted: 1998-07-15
Abstract: 내용없음
Patent KR-970011698-B1 (KR)
Title: Rapid access teletext decoder arrangement
Inventor: WILLEN DEN HOLLANDER
IPC: H04N7/035
Filed: 1989-03-17
Granted: 1997-07-14
Abstract: A teletext decoder includes a background or buffer memory (45) operating as a first-in, first-out (FIFO) memory. The buffer memory (45) is used for storing a large number of teletext pages. A given video line that contains teletext information is identified as such by the detection of part of a clock run-in sequence followed by the framing code. The video line is then stored in the background memory (45). After a user page request occurs, the background memory (45) is read-out by a data processor (30) operating in a full channel mode of operation for obtaining the information of the requested page. As long as the read-out operation has not been terminated, incoming teletext data is stored in the background memory (45). This enables teletext data received prior to termination of the read-out operation to be read out and processed by the data processor.
Patent KR-0177796-B1 (KR)
Inventor: SHUSTER JERRY PAUL
IPC: B29K77/00
Filed: 1989-04-14
Granted: 1999-04-15
Abstract: 내용 없음.
Patent KR-920009234-B1 (KR)
Title: Duplicating method of time switch
Inventor: LEE BYONG-MU
IPC: H04Q11/04
Filed: 1989-04-29
Granted: 1992-10-15
Abstract: The method is to operate time  switches  of  a  NAS  to  CEPT signal converter so that channel is re-assigned regardless to  the kind of trunk. The method comprises: (A) reassigning channels of a main and an auxiliary time switch for  converting  digital  signal transmitted through a NAS trunk or a CEPT trunk; (B)  initializing fault flag, operating the time switches and sending diagnosis data through a special stream output terminal; (C) inspecting the fault flags and input diagnosis  data  and  for  the  normal  condition, enabling the main time switches to convert input digital  signals; (D) setting the  fault  flags  and  switching  on  the  auxiliary switches for the abnormal condition of the main time switches; and (E) operating the auxiliary time switches and checking  the  fault of the switches.
Patent KR-930005464-B1 (KR)
Inventor: KAKIMODO MASAGAZU
IPC: B23B47/02
Filed: 1989-06-14
Granted: 1993-06-22
Abstract: 내용 없음.
Patent KR-940002213-B1 (KR)
Inventor: SASAKI SHOJI
IPC: G01F15/02
Filed: 1989-07-26
Granted: 1994-03-19
Abstract: 내용 없음.
Patent KR-0134965-B1 (KR)
Inventor: FLETCHER-JONES DAVID FRANCIS
IPC: F02F3/00
Filed: 1989-10-13
Granted: 1998-04-21
Abstract: 피스톤링 홈 및 링벨트가 형성된 크라운을 포함하고 있는 내연기관용  피스톤에 있어서, 크라운은 피스톤축에 대해 횡방향으로 배열되며 축방향으로 뻗은 2개의 웨브에 의해서 연결된 피스톤핀보스에 의해 지지되며 각각의 평평한 웨브 및 핀보스와 연결된지지 리브에 의해서 또한 지지되되 지지 리브는 크라운 하면으로부터 축방향으로 뻗어있고 평면의 웨브에 대해서 횡방향으로 뻗어있는 피스톤이 개시되어 있다. 피스톤은 관절연결 또는 단일금속 구성일 수 있다.
Patent KR-0140892-B1 (KR)
Title: 수평 증기 분리기-과열기용 과열기 다발
IPC: F22G1/00
Filed: 1989-12-14
Granted: 1998-07-01
Abstract: 본문 내용 없음