baber/WOPTO huggingface dataset:
Patent KR-890004463-B1 (KR)
Title: Semiconductor device having metal pole distribution line
Inventor: OKA MODO
IPC: H01L29/43
Filed: 1985-12-03
Granted: 1989-11-04
Abstract: The device relates to a LSI circuit with a metal electrode wiring film.  The metal electrode wiring film lowers resistance of the diffusion layer of Si substrate, sheet resistance of polysilicon film itself, and contact resistance between them.  And also the metal electrode wiring film has an excellent thermal and chemical resistivity.  The base area for contact of the electrode wiring is a metal silicide film which lowers the resistances.
Patent KR-940005380-B1 (KR)
Inventor: CHRISTOPHER TOD J
IPC: H03H17/00
Filed: 1985-12-18
Granted: 1994-06-17
Abstract: 내용 없음.
Patent KR-890001682-B1 (KR)
Title: Wobble plate type compressor
Inventor: OOTA MASAKI
IPC: F04B27/18
Filed: 1986-08-29
Granted: 1989-05-13
Abstract: The wobble plate type compressor is provided with a spring which is forced against a wobble device in such a way that it opposes a decrease of the inclination angle of the wobble plate. The force of the compression spring opposes a differential pressure force between a pressure in a crankcase interior and a pressure in a discharge chamber, which force causes a moment of the wobble plate in one direction.  The pressure in the suction chamber is equal to the constant pressure level in the crankcase interior in the region where an inclination angle of the wobble plate is controlled.  If the force of the spring is too weak, the temp. of the air exhausted through the evaporator is high, and thus the occupant of the vehicle feels uncomfortably hot.
Patent KR-900002344-B1 (KR)
Title: Method of producing toy vehicle
Inventor: KIM CHUNG-KYUNG
IPC: C08L23/04
Filed: 1986-11-15
Granted: 1990-04-12
Abstract: The method is for making a toy car body which is commonly used as a writing pencil or crayon.  The method comprises mixing low density polyethylene, wax, a colouring agent at the temperature of 120≰C, rolling the mixtures, cooling them, crushing, and injection molding. The composition ratio of the mixtures is 35-70% polystyrene, 2-25% colouring agent, and 15-50% wax.
Patent KR-900003983-B1 (KR)
Title: Tape guiding apparatus of video tape recorder
Inventor: LEE MOO-YOUNG
IPC: G11B15/43
Filed: 1986-11-28
Granted: 1990-06-07
Abstract: A tape guiding apparatus includes the first transistor (TR1) connected with a secondary output of the tranformer, a microprocessor connected with Vcc1 through a resistor, TR2, TR3, TR4 connected with output terminals (out1, out2, out3) of the microprocessor, TR5 connected with the emitter of TR2, and a reel brake apparatus (3) connected with the collector of TR5. The tape guiding apparatus controls the reel brake appts. and prevents the tape damage from interruption of electric power.
Patent KR-900006596-B1 (KR)
Title: Clutch control system and clutch assembly using same
Inventor: BROWN EUGENE R
IPC: B60W30/18
Filed: 1986-12-17
Granted: 1990-09-13
Abstract: The system includes a comparator (10) for receiving a signal (A) corresponding to actual engine speed from a sensor (6) and a signal (D) corresponding to desired engine speed from a sensor (8) to provide an output signal (A-D). The later (A-D) is provided to a summer (16) as well as differentiator (14) which operates upon the output signal (A-D) to provide the differential with respect to time d(A-D)/dt which is received by the summer (16) which provides the function signal (A-D)+d(A-D)/dt to an actuator (2) which utilises the functional signal to control a clutch (4). The functional signal may also include one or more weighting factors to control the magnitude of signals (A) and/or (D) and/or (A-d) and/or d(A-D)/dt in the manner desired.
Patent KR-900004590-B1 (KR)
Title: Output buffer circuit
Inventor: NAKAMURA KENECHI
IPC: H03K17/687
Filed: 1987-03-20
Granted: 1990-06-30
Abstract: The buffer circuit comprises a load transistor circuit having two states, for increasing the input current of the buffer circuit from a first predetermined voltage when the load transistor circuit is in one of the two states. A drive transistor circuit has two corresponding states, for increasing the input current of the buffer circuit from a second predetermined voltage when the load transistor circuit is in a state opposite to the one state. A circuit reduces the rate of increase in the input current of the buffer circuit for stabilising the power source voltage.
Patent KR-900003996-B1 (KR)
Title: Tail lock structure of band
Inventor: TAKEUCHI HUMIO
IPC: A44C5/20
Filed: 1987-03-24
Granted: 1990-06-07
Abstract: The strap structure comprises a buckle body (1) consisting of a synthetic resin material and having two leg portions, a mounting hole and a mounting pin. The mounting hole is provided at the end portion of one of the leg portions. The mounting pin is provided on the other one of the leg portions and has a small-diameter portion. The large- diameter portion is press fitted into the mounting hole which is formd with its diameter larger than the small diameter portion and smaller than the large diameter portion.
Patent KR-890001219-B1 (KR)
Title: Shedding apparatus
Inventor: MURAYAMA YOSIZI
IPC: D03D41/00
Filed: 1987-04-21
Granted: 1989-04-27
Abstract: Warps shedding appts. for looms, comprises two parallel guides each supporting a rotatable shaft, with each shaft having secured to it many block units having portions projecting radially oppositely from the shaft.  Each block comprises two plates with a spacer between, and each plate has an outwardly bent tip portion. The blocks shed warps as they revolve, and the bent tips pass a warp crosswise to an adjacent block.
Patent KR-920000771-B1 (KR)
Inventor: SCHMIDT GUDRUN
IPC: B60N2/90
Filed: 1987-10-28
Granted: 1992-01-23
Abstract: 내용 없음.
Patent KR-900009133-B1 (KR)
Inventor: SHIBATE NOBUO
IPC: B60G21/055
Filed: 1987-11-28
Granted: 1990-12-22
Abstract: 내용 없음.
Patent KR-900004355-B1 (KR)
Title: Balancing device of automobile fuel tank
Inventor: BAE YEON-RO
IPC: B60K15/03
Filed: 1987-12-18
Granted: 1990-06-23
Abstract: An auxiliary tank the upper of which is opened is provided in fuel tank (5), and a fuel pump is installed in the auxiliary tank. The lower of the auxiliary tank is partially curved so that a valve hole can be formed. A check valve (3) positioned at the valve hole forms oil way from the outer to the inner of the auxiliary tank.
Patent KR-910004488-B1 (KR)
Inventor: GIOKA MAMORU
IPC: C08G79/00
Filed: 1988-02-13
Granted: 1991-06-29
Abstract: 내용 없음.
Patent KR-910009383-B1 (KR)
Title: New microorganism bacillus sp kctc 83309
Inventor: CHIO YONG-CHUL
IPC: C12N1/20
Filed: 1988-02-13
Granted: 1991-11-14
Abstract: New microorganism bacillus strain AC-1,  KCTC  833OP  (I)  is screened from soil. The (I) having antagonism is  useful  for  the treatment of pestilence of red pepper. The (I) as biotic pesticide has  a  bacteriocidal  activity  against   phytophotora   capsici, valsamali, rhizactonia sp. etc. The (I) is produced by  fermenting in the medium contg. 15g sucrose, 300g boiled potato,  8  ml  corn steep liquor, 0.5g Ca(NO3)24H2O, 2g Na2HPO412H2O and 1 l distilled water (PH 7.3).
Patent KR-900004573-B1 (KR)
Title: Process for making instant rice cake
Inventor: LEE SANG-HYO
IPC: A23L7/10
Filed: 1988-02-15
Granted: 1990-06-30
Abstract: A rice cake with 30-50% water content having long term preservation is made by mixing 40-80% nonglutinous rice with glutinous rice, wheat flour and starch, doughing them until the water content become 30- 50%. The improved process is carried out by extruding the cake in the extruder with a screw having several cutters, passing it into a barrel and cutlet at 50-80 C, gelatizing and swelling it, and fixing the swelled structure by cooling and drying.
Patent KR-970001613-B1 (KR)
Inventor: MARKWART TERRANCE L
IPC: H01R13/28
Filed: 1988-02-15
Granted: 1997-02-11
Abstract: 내용 없음.
Patent KR-900000523-B1 (KR)
Title: Process for preparing l-glutamic acid of zymotechnics
Inventor: LEE BONG-HAK
IPC: C12P13/14
Filed: 1988-03-31
Granted: 1990-01-31
Abstract: A L-glutamic acid is prepd. by culturing L-glutamic acidproduce- bacteria i.e. ATCC 14067, ATCC 14020, ATCC 13032, ATCC 13807 in saccharine medium [cane molasses (CM) and high test molasses (HTM) are admixed by 3:7-5:5 ratio as carbon sources . CM:HTM is controlled to 8:2-6:4 and 4:6-2:8 ratio in multiplication and L-glutamic acid producing period, respectively.
Patent KR-900003954-B1 (KR)
Title: Stannic acid anhydride
Inventor: GOBASHI DOSHIYUKGI
IPC: G02F1/1335
Filed: 1988-05-18
Granted: 1990-06-05
Abstract: Stannic anhydride derivs. of formula HO-Sn( =O)-O-X (I) are new where X =HO-CO-CO-, HOO-CO-CO- or HCOO-. Tin cpds. have good workability and are capable of giving tin oxide powders, films and fibres with excellent transparency and electrical conductivity industrially advantageously without using complicated equipment. By using the stannic anhydrides or water-soluble reaction products of carboxylic acid tin salts and peroxides, uniform tin oxide covering film can be formed on powder, film and fibre substrates to give products with excellent electrical conductivity useful as transparent electrodes.
Patent KR-880001761-B1 (KR)
Title: Process for preparing intermediate products for the preparation of cepharosporins
Inventor: KINAST GUENTER
IPC: C07D277/28
Filed: 1988-06-21
Granted: 1988-09-12
Abstract: Intermediates (I) for prepg. cephalosporins are new. R1=lower alkyl or (un)substd. Ph, R2=alkoxycarbonyl, R5=lower alkyl or (un)substd. allyl.  Stir a mixt. of ethyl 2-aminothi azole-4-ylacetate 186g (1mol), DMS 300mL and 98% di-tertiarybutylpyrrocarbonate 500g (2.3 mol) for 1 week at room temp., and ice water 3.5L, suck filter and wash cake with water 2L, pour in CH2Cl2  2L, dry CH2Cl2 phase with Na2SO4 after separating water, conc. by rotatory evaporator and immediately crystallize in petroleum ether 2L to give ethyl 2- tertiary-butoxycarbonylimino-3tertiary-butoxy-4-thiazolin-4-ylacetate (yield=78%, m.p=90 deg.C).
Patent KR-920000112-B1 (KR)
Inventor: MACHIN DAVID
IPC: C11D17/00
Filed: 1988-07-29
Granted: 1992-01-09
Abstract: 내용 없음.
Patent KR-960016590-B1 (KR)
Inventor: CAMPBELL COLIN D
IPC: C07C67/00
Filed: 1988-08-06
Granted: 1996-12-16
Abstract: 요약없음
Patent KR-940002140-B1 (KR)
Inventor: KIM TAE-JO
IPC: F27D17/00
Filed: 1988-09-05
Granted: 1994-03-18
Abstract: 내용 없음.
Patent KR-910002847-B1 (KR)
Title: Method to the grass cut in a waterway
Inventor: MIN YOB
IPC: A01M21/00
Filed: 1988-09-16
Granted: 1991-05-06
Abstract: A  method  for  removing  waterweeds  is  characterized   by installing a pressurized weeder on the waterweeds and  continously moving the weeder to the downstream according to  growth  rate  of waterweed. After that, the waterweeds are removed by weight of the weeder. The weeder  (1)  comprises  a  longwise  supportor  (2,2') having a crosswise suppoty member (3).
Patent KR-960007094-B1 (KR)
Title: Process for hydrolyzing a partially extracted roasted and ground coffee
Inventor: STAHL HOWARD DAVE
IPC: A23F5/40
Filed: 1988-11-23
Granted: 1996-05-27
Abstract: The invention involves solubilizing a partially extracted roasted and ground coffee, such as the spent grounds from a commercial coffee percolation system, in a reactor, preferably a plug flow reactor, by a high temperature short time process without the introduction of any added acid catalyst. The hydrolysate, thus obtained, is useful for increasing the soluble coffee solids content in combination with an aqueous extract of roasted coffee.
Patent KR-910001662-B1 (KR)
Title: Safety belt
Inventor: PARK SA-RYONG
IPC: B60R22/44
Filed: 1988-12-08
Granted: 1991-03-18
Abstract: The safety belt improves a belt retractor by having a winding power braking means. The safety belt includes;  emergency  braking means with a dog device, having ratchet gear operated  by  braking lever; winding power controlling means by actuation of  snatching; ratchet gears (32,32') formed at winding shaft (5);  ratchet  gear (11) having ratchet formed opposite to the  gearing  direction  of ratchet gears (32,32').
Patent KR-910004108-B1 (KR)
Title: Wire bonding recognition method
Inventor: OH SUN-JOO
IPC: G01N21/00
Filed: 1988-12-28
Granted: 1991-06-22
Abstract: The method for recognizing the wire bonding is  performed  by disting ushing between the aluminium  metal  and  oxide  by  using brightness  and  darkness.  The  distinction  of  colour  in   two materials, thatis white colour in the case of aluminium metal  and black colour in the case of oxide, is obtained  by  selecting  the optimum aluminium grain size. The optimum aluminium grain size for recognizing the aluminium metal as the white colour is 2μm-4.5μ.
Patent KR-950008330-B1 (KR)
Inventor: OESTMANN CARSTEN
IPC: F16C13/00
Filed: 1987-12-09
Granted: 1995-07-27
Abstract: 내용 없음.
Patent KR-920000153-B1 (KR)
Title: Concrete having high-strength and preparation method thereof
Inventor: EUM TAE-SUN
IPC: C04B28/02
Filed: 1989-03-24
Granted: 1992-01-09
Abstract: The high-strength concrete is produced by mixing  the  cement compsn. of 100 wt.% fortland cement, 5-20  wt.%  gypsum  anhydride and 2-40 wt.% silica fume with 0.5-3 wt.% superplastisizer, 0.01-3 wt.% surface-gloss  and  effloresce-resistant  agent   agent   of polyvinylalcol,  alkylcellulose,  carboxyl  cellulose  and  methyl cellulose,  and  5-20  wt.%  initial   hardening   and   hydrating accelerator to the silicafume, moulding in a centrifugal  moulder, and steam-curing at 50-95 deg.C for 3-5 hours. The  produced  body has at least 800-950 kg/cm2 compressive strength.
Patent KR-0131764-B1 (KR)
Inventor: OSBORN N THOMAS WARD
IPC: A61F13/15
Filed: 1989-03-30
Granted: 1998-04-13
Abstract: 내용없음
Patent KR-920008205-B1 (KR)
Inventor: HUSS RONALD E
IPC: G06T15/20
Filed: 1989-04-10
Granted: 1992-09-25
Abstract: 내용 없음.
Patent KR-910010241-B1 (KR)
Title: Filter material making method
Inventor: PARK JUNG-WOO
IPC: D01D1/10
Filed: 1989-04-15
Granted: 1991-12-24
Abstract: A filter  element  is  produced  by  maintaining  a  constant tension of a non-wooven fabric by the tension roller and the guide roller, heat-pressing the fabric by the pressing  roller  and  the infrared heater and then winding it by the bar roller coated  with a teflon, cooling it, cutting it to the fixed length, and  coating the  section  with  a  polyvinyl  chloride  molten  solution.  The non-wooven fabric is obtained from the conjugated  fiber  composed of polyethylene as a low m.p. thermoplastic  resin  component  (A) and polypropylene as a high m.p. thermoplastic resin component (B) [The cross area ratio of (A) and (B) = 60:40 - 80:20 .
Patent KR-890003595-B1 (KR)
Title: Regeneration system for diesel particulte oxidizer
Inventor: KUME SATORU
IPC: F02B3/06
Filed: 1989-04-18
Granted: 1989-09-25
Abstract: A system comprises a diesel particulate oxidizer having a trap carrier of a ceramic foam with catalyst, regenerating means, regeneration timing control means, engine state sensor, inhibiting means of retard control signal, temperature detecting means, and particle burning control means.  The regenerating means are comprised of fuel injection timing control means for controlling the fuel supply timing to the fuel injection device in the diesel engine.  The regeneration timing control means produces the retard control signal for controlling the injection timing of the fuel injection timing control means at promotion of regeneration based on the regeneration timing detecting signal thereof.
Patent KR-930000998-B1 (KR)
Inventor: KATSURA KOYO
IPC: G06T11/00
Filed: 1989-05-24
Granted: 1993-02-12
Abstract: 내용 없음.
Patent KR-910005423-B1 (KR)
Title: Mount for jewel
Inventor: POELL MARTIN
IPC: A44C17/02
Filed: 1989-06-14
Granted: 1991-07-29
Abstract: A secure mounting for jewellery stones, which is easy to manufacture, has a strip (21, 22), which has a slot (15), surrounding the circumference of the setting side of the jewellery stone (18). Arranged at the upper edge of the strip (21, 22) are holding elements (19, 20) for the stone (18). Holding tongues (12, 13), arranged on the strip (21, 22), which are inclined outwards and upwards, serve for fixing the mounting in a support opening. 
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Patent KR-920000864-B1 (KR)
Title: Method of producing plate making roll
Inventor: KIM CHOL-HWAN
IPC: B41C1/00
Filed: 1989-08-23
Granted: 1992-01-30
Abstract: The process roll facilitates to transfer ink  or  chip  on  a fabric smoothly, and prevents spreading  of  printing  pattern  in rotary screen printing. The method comprises a passivation process for forming sulfidized or oxydized film layers on the  pattern  of stainless steel  tube;  a  partition-wall  forming  process  using photosensitive resin for preventing speading of the coted surface; nickel electrocast plating for giving sufficent  hardness  to  the process roll.
Patent KR-0138267-B1 (KR)
Inventor: HOUCK KENNETH A
IPC: H04M1/00
Filed: 1989-12-13
Granted: 1998-06-15
Abstract: 내용없음
Patent KR-930003334-B1 (KR)
Inventor: NOGAWA ATSUHIKO
IPC: B01D65/00
Filed: 1988-09-16
Granted: 1993-04-26
Abstract: 내용 없음.
Patent KR-960010624-B1 (KR)
Inventor: GAWASE SINJI
IPC: D04B15/06
Filed: 1990-02-12
Granted: 1996-08-06
Abstract: 내용 없음.
Patent KR-960005784-B1 (KR)
Inventor: SO ALLEN K
IPC: F28F3/04
Filed: 1990-02-24
Granted: 1996-05-01
Abstract: 내용 없음.
Patent KR-930005021-B1 (KR)
Inventor: WADARI TADAYOSHI
IPC: B62D25/08
Filed: 1990-03-31
Granted: 1993-06-12
Abstract: 내용 없음.
Patent KR-930001498-B1 (KR)
Title: Interconnecting method of multilevel metallayer
Inventor: LEE JUN-SHIK
Filed: 1990-05-11
Granted: 1993-03-02
Abstract: The interconnection method between  the  multilevel  metallic layers comprises (a) depositing the LTO layer (1) and  BPSG  layer (2) on transistors and capacitors,  respectively,  (b)  depositing the first layer (3) having a thickness of  50-100  angstroms  with MOSi2/Al-Si-Cu/MOSi2 on the above layer,  (c)  forming  the  first plasma oxide layer (4)/SOG layer (5) on the polymeric  layer  (7a) treated by photosensitive solution, NMD-3,  for  2-100  sec.,  (d) forming the second MOSi2/Al-Si-Cu-MOSi2 layer (8) having the  same thickness as the first layer on the second plasma oxide layer (6).
Patent KR-930003201-B1 (KR)
Title: Bit image data compressing method and apparatus
Inventor: SHIN JAE-SOP
IPC: H04N7/12
Filed: 1990-06-14
Granted: 1993-04-23
Abstract: The apparatus and method  maintains  data  compressing  ratio regardless of the type of bit image data by replacing  8x8  window by a code which is determined by a frequency  of  1's  in  an  8x8 window. The method comprises the steps: (A) reading data in a  bit image memory (100) by block units and storing the data on a  block memory; (B) outputting the block data in series using  a  parallel to series converter (300); (C) transmitting the serial data  to  a counter; (D) counting the number of 1's in the  serial  data;  (E) checking that a certain number of data is received by  a  counter; (F) storing a code transmitted from a  counter  according  to  the number of 1's on a compressed data memory (500); and (G)  checking that all data is read from a bit image memory (100).
Patent KR-930010234-B1 (KR)
Title: Epoxy molding composition
Inventor: KIM TAEK-KON
IPC: C08L63/00
Filed: 1990-07-04
Granted: 1993-10-15
Abstract: preparing  the molding compsn. by adding 1-100 wt.pts. of the curing accelerating agent, w.r.t. 100 wt.pts of polyoxyalkylene polyamine,  comprising in the ratio of 1:8 - 1:1 piperazine  and  alkanol  amine  in  the mixt., to be mixed by shoichiometically,  comprising  polyglycidyl ether  of multi-nalent  hydrogen   phenol   and   polyoxyalkylene polyamine of R((OA)xNH2)y, where R=  hydrocarbon  radical,  A=C2-4 alkylene radical, x = 1-10, y = 2-4 the  same  of  valence  of  R; mixing in the 3-7 mixing ratio aggregates with the  obtd.  molding compsn.; curing at room temp.; cutting to a size; and coating  the surface of the resultant piece with a ceramic coating agent.
Patent KR-920004411-B1 (KR)
Title: Program down method using e2prom
Inventor: HWANG MYUNG-KOO
IPC: G06F12/16
Filed: 1990-07-07
Granted: 1992-06-04
Abstract: A checking finds to whether programs are loaded in an  EEPROM (43), and then, a disc (42) is checked to decide whether a program is stored in it. If no program is stored, a disc request alarm  is outputted to inform of the lack of program. If there is  stored  a program, the program is read from the disc (42) to transmit it  to the EEPROM (43). The program of the EEPROM (43) is transferred  to a RAM (45), and the system is initialized.  Then  the  program  is executed to find any serious error  or  a  system-down.  With  the method, program changes can be made without disabling  the  system by using an EEPROM.
Patent KR-930006438-B1 (KR)
Title: Sheet of polyvinylbutylal and polyurethane
Inventor: DAVID DONALD J
IPC: C08L75/04
Filed: 1990-09-17
Granted: 1993-07-16
Abstract: A sheet formed of a polyblend comprising, on a weight basis, a) 30 to 90% polyvinyl butyral containing about 11 to 30 % hydroxyl groups and b) 70 to 10% thermoplastic polyurethane which is the reaction product of: i) polyether polyol or a mixture of polyether polyol and polyester polyol; and ii) aliphatic diisocyanate, aromatic diisocyanate or a mixture of aliphatic and aromatic diisocyanates; the combined percentages of a) plus b) in the polyblend always equaling 100%; such sheet at 0.76mm thickness having no greater than 2% haze.
Patent KR-930000336-B1 (KR)
Inventor: KAISER JOHN J
IPC: B23K9/04
Filed: 1990-09-15
Granted: 1993-01-16
Abstract: 내용 없음.
Patent KR-940010520-B1 (KR)
Inventor: NAKASAKI YASUSHI
IPC: H01L21/3205
Filed: 1990-09-28
Granted: 1994-10-24
Abstract: 내용 없음.
Patent KR-930004920-B1 (KR)
Title: Dual tone multi-frequency signal generator for telecommunications
Inventor: LEE SUNG-CHAN
IPC: H04M1/00
Filed: 1990-09-28
Granted: 1993-06-10
Abstract: The dual tone multi-frequency signal generator for  executing the tele-control function for the mechanical telephone  comprises: a key matrix section (19) selecting the  set  for  remote  control through the telephone line; a micom (20)  generating  the  control signal for outputting the message  corresponding  to  the  control function selected by (19); a DTMF generator  (21)  outputting  the DTMF tone pulse signal and converting the dial key signal into the DTMF signal; a liquid crystal display (26) displaying the selected function; an LCD driver (25) driving the LCD.
Patent KR-930002669-B1 (KR)
Inventor: CHENG JUNG-JEN A
IPC: B22D11/10
Filed: 1990-10-22
Granted: 1993-04-07
Abstract: 내용 없음.
Patent KR-930006357-B1 (KR)
Title: Traffic-data measuring method
Inventor: NAM YONG-U
IPC: H04M3/36
Filed: 1990-12-31
Granted: 1993-07-14
Abstract: The traffic data of a full electronic exchange  is  collected and analyzed by a statistical research function which is  operated exclusive  to  a  call  process  function  when  a  traffic   data acqusition request is received. The method  comprises  the  steps: (A)  executing  a  subscriber's  call   processing   routine   and signalling equipment operating routine  when  a  call  request  is received from a subscriber; (B) executing call failure  processing routine when a call is not connected  successfully  and  otherwise executing a first  digit  dialing  routine;  (C)  translating  the station number after  executing  signalling  equipment  processing routine; and (D) collecting traffic data.
Patent KR-970005271-B1 (KR)
Title: Group line control
Inventor: PARK KI-JIN
IPC: H04M3/58
Filed: 1991-01-12
Granted: 1997-04-14
Abstract: Interface control circuit between three people in the two line telephone, consists of a voltage detecting means, an impedance interface means, the second and third bridge rectifier, the first and second amplifier and a microprocessor. The microprocessor detects the line voltage through the voltage detecting means, and controls the  voltage detecting means and the impedance interface means according to the line voltage. The line A interfaces with the first bridge rectifier and the line B interfaces with the fourth bridge rectifier, or the line A interfaces with the second bridge rectifier and the line B interfaces with the third bridge rectifier.