baber/WOPTO huggingface dataset:
Patent KR-20000013281-A (KR)
Title: Man machine language embodiment method
Inventor: LEE YOON HUI
IPC: G06F9/00
Filed: 1998-08-06
Abstract: PURPOSE: A man machine language embodiment method is provided to remove process of preinstall and economize a memory. CONSTITUTION: The method comprises the steps of: defining and declaring a command and action function table, receiving a new instruction, analyzing a command list, and executing a function according to the defined command/action table. The command list is analyzed by analyzing an argument and the number of a command from the command list. The function is executed when the analyzed command is registered in the table.
Patent KR-20000013352-A (KR)
Title: File transmission method of line failure endurance type through system signalling no. 7 protocol transport layer interface
Inventor: KIM SEUNG HWAN
IPC: H04L29/06
Filed: 1998-08-07
Abstract: PURPOSE: A file transmission method of a line failure endurance type allows a file transmission application program to endure a line failure, makes a spare line have a data transmitting/receiving operation, and enhances a line utility. CONSTITUTION: A communication system constructs (S1) a system signalling No. 7 protocol stack for a connection with another system. A transport layer interface is made (S2) for connecting the system signalling No. 7 protocol stack with a file transmission application program. A first line and a second line which connect two points separated from each other is defined as one set (S3). The system signalling No. 7 protocol stack senses (S4) a failure of the first line. Additional system signalling No. 7 protocol stack management processor informs the failure (S5). A communication using the first line is stopped (S6). After the line is reconstructed, a data communication quantity is distributed (S7) to a first line and a second line. Thereby, a file transmission application program is released from a line failure, two lines are used in a normal state, a line utility is enhanced.
Patent KR-19990024004-A (KR)
Title: 회전 압축기
IPC: F04C29/00
Filed: 1998-08-28
Abstract: 본 발명은 내마모성이 뛰어나고, 가공성이 좋은 주물을 사형에 칠러를 병용하여 제작하고, 이를 회전 압축기의 실린더로서 사용하도록 한 것으로, 사형주물법으로 제작한 주물을 가공하여 형성된 실린더를 채용한 압축기에 있어서, 상기 실린더의 절삭가공을 필요로 하는 부분의 재질을 부분적으로 공정흑연 바탕재질(basis material)(페라이트 바탕재질)로 형성하여 블레이드 슬롯홈의 가공성을 향상시킴과 동시에, 블레이드 슬롯홈내에 배설되는 블레이드의 접동면의 마모량을 감소시킬 수 있는 회전 압축기를 제공한다.
Patent KR-19990036849-A (KR)
Title: 박막 트랜지스터 및 박막 트랜지스터의 제조 방법
IPC: H01L29/786
Filed: 1998-10-02
Abstract: 바텀(bottom) 게이트형 박막 트랜지스터의 스토퍼의 막 두께를 최적화한다. 
     게이트 전극(22)이 배치된 투명 기판(21)상에, 게이트 절연막이 될 질화 실리콘막(23) 및 산화 실리콘막(24)이 적층되고, 다시 활성 영역이 될 반도체막으로서의 다결정 실리콘막(25)이 적층된다.  게이트 전극(22)에 대응하는 다결정 실리콘막(25)위에 스토퍼(26)가 배치되며, 이 스토퍼(26)을 덮도록 층간 절연막이 될 산화 실리콘막(27) 및 질화 실리콘막(28)이 적층된다.  스토퍼(26)의 막 두께T0가 800Å 내지 1200Å의 범위로 설정된다.
Patent KR-20000025270-A (KR)
Title: Semiconductor wafer cassette
Inventor: AN SEUNG HOON
IPC: H01L21/68
Filed: 1998-10-09
Abstract: PURPOSE: A semiconductor wafer cassette is provided to perform transportation by a robot arm, to use space in a clean room effectively by stacking a number of wafers vertically and to work with standing a wafer loaded to a cassette. CONSTITUTION: A semiconductor wafer cassette includes: an open body(10) where a handling part is formed on an outer side, and whose front is opened so that a number of wafers are inserted into between a number of slots formed on an inner side; and a flange part(20) formed on a top surface of the body in the form corresponding to a robot arm in order for the robot arm to elevate the body by seizing flange parts at both sides.
Patent KR-20000028148-A (KR)
Title: Multi channel sound system on tv
Inventor: KIM YEONG UN
IPC: H04N5/60
Filed: 1998-10-30
Abstract: PURPOSE: A multi channel sound system on TV is provided to give convenience to a user who studies foreign languages, by using multiplex transmission broadcasting, and by differentiating delay time of a sub voice according to a language of the sub voice, after outputting the sub voice by delaying the sub voice for regular time in a multiplex mode of the multiplex transmission broadcasting. CONSTITUTION: A multi channel sound system on TV comprises a main voice processor(90)/a sub voice processor(100), a voice amplifier(110), a KBPS(Korea Broadcasting Program System) decoder(170), an A/D(Analog/Digital) converter(181), a memory(182), and a D/A(Digital/Analog) converter(183). The main voice/sub voice processors output a main voice signal and a sub voice signal of multiplex transmission broadcasting by demodulating the signals, respectively. The voice amplifier selectively amplifies the main voice/the sub voice/the main voice + the sub voice by a control signal, and presents the amplified voices to outside through speakers(120a,120b). The KBPS decoder decodes a KBPS signal which is one of a broadcasting system supplying an extended data service. The A/D converter converts a sub voice signal outputted in the sub voice processor into a digital signal by a sub voice delayer(180). The memory stores the converted sub voice signal. The D/A converter converts the digital signal outputted from the memory into an analog signal, and outputs the analog signal to the voice amplifier.
Patent KR-20000032259-A (KR)
Title: Exposure mask for exposing edge part of wafer
Inventor: JEONG SOON HO
IPC: H01L21/027
Filed: 1998-11-13
Abstract: PURPOSE: An exposure mask for exposing an edge part of a wafer is provided to prevent efficiency of a manufacturing process of a semiconductor device from being reduced due to an increase of a process time by a sequential exposure of the edge part of the wafer. CONSTITUTION: A basic form of an exposure mask is a wafer form. The exposure mask exposes a contact part of a clamp and has the same a flat zone form as the flat zone of a wafer(130) above the flat zone of the wafer.
Patent KR-20000032716-A (KR)
Title: Method for controlling rotational frequency of exhaust fan and supply amount of gas of gas boiler
Inventor: PARK JAE KYEONG
IPC: F23N1/00
Filed: 1998-11-17
Abstract: PURPOSE: A controlling method of the rotational frequency of an exhaust fan and the supply amount of gas of a gas boiler is provided to drive an exhaust fan and to supply gas in optimum state by controlling the supply amount of gas to supply gas proper to the rotational frequency of an exhaust fan and to be adapted to the change of aging of a wind pressure switch. CONSTITUTION: A fan driving voltage supplied to an exhaust fan is lowered gradually from the maximum value, and the fan driving voltage at the moment of which a wind pressure switch is turned off is sensed. If the wind pressure switch is on, the fan driving voltage is gradually lowered and supplied. A lowest driving voltage of an exhaust fan is set up by the fan driving voltage supplied to the exhaust fan at the step right before the off of the wind pressure switch by sensing the exhaust fan driving voltage at the moment of which the wind pressure is off. The amount of gas supplied in the driving of the exhaust fan by the supply of lowest driving voltage is set up to the lowest supply amount of gas. When the wind pressure switch is on, the exhaust fan is driven by the fan driving voltage by a predetermined supply amount of gas to be proportional to the sensed fan driving voltage and then the gas is continuously supplied by the predetermined supply amount of gas.
Patent KR-20000038390-A (KR)
Title: Apparatus for transferring data at high speed using dma
Inventor: LIM HYONG JOON
IPC: H04L12/58
Filed: 1998-12-07
Abstract: PURPOSE: An apparatus for transferring a data at a high speed using a DMA is provided to improve a data processing efficiency of a system by removing a standby time of a data inputted to and output from an FIFO to thereby speeding data transmission to an interface card according to a DMA request signal. CONSTITUTION: A DMA controller(12) inputs and outputs an information data of a memory. An FIFO 1(16) and an FIFO 2(18) temporarily store data to transfer the input and output data of the DMA controller(12) to an interface card(24). A demultiplexer(20) and multiplexer(22) selectively flow in and out the information data to the FIFO 1(16) and FIFO 2(18). An FIFO control logic(14) controls the demultiplexer(20) and the multiplexer(22) and transfers a state signal to the DMA controller(12) and to the interface card(24).
Patent KR-20000038775-A (KR)
Title: Color liquid crystal display device having 3 color back light and method for driving the same
Inventor: YOO HAN JIN
IPC: G02F1/1335
Filed: 1998-12-09
Abstract: PURPOSE: A color liquid crystal display device having 3 color back light and a method for driving the same are provided to output data at same frequency to the frequency of data transmitted from a graphic controller. CONSTITUTION: A color liquid crystal display device having 3 color back light includes a gate driver(300), a data driver(200), a serial/parallel data converter(700), and a timing controller(400). The gate driver(300) implies gate on voltages on plurality of gate lines sequentially. The data driver(200) implies an analog data voltage representing an image signal to the data lines. The serial/parallel data converter(700) receives R,G,B data signals from the graphic controller and outputs a parallel data comprised of 3n signal units. The timing controller(400) receives the output of the serial/parallel data converter and transmits to the data driver.
Patent KR-20000039422-A (KR)
Title: Test apparatus of radio communication system
Inventor: KANG CHOONG KOO
IPC: H04B17/00
Filed: 1998-12-12
Abstract: PURPOSE: A test apparatus of the radio communication system is provided to remarkably reduce the cost required for the test by testing the vocoding of a terminal and the function of radio section connection without the equipment of the satellite station and earth station. CONSTITUTION: A connection part(110) connects test request and the associated signal to the radio communication system, according to a preset protocol. A vocoding and devocoding part(120) vocodes the signal connected through the connection part(110) and devocodes a test request associated signal transferred through an interface(160). A call processing control part(130) transfers the frame of the test request associated signal transferred through an interface(160). A coupling and distributing part(140) couples the signal vocoded by the vocoding and devocoding part(120) and the frame transferred from the call processing control part(130) and transfers coupled test request and the associated signal to the connection part(110). A computer(150) provides test request and the associated signal to test the radio communication system. The interface(160) connects the signal between the computer(150) and the vocoding and devocoding part(120) and connects the signal between the computer(150) and the call processing control part(130).
Patent KR-20000039632-A (KR)
Title: Apparatus and method for manufacturing plasma display device
Inventor: PARK DEUK IL
IPC: H01J11/50
Filed: 1998-12-15
Abstract: PURPOSE: A method for manufacturing a plasma display device is provided to shorten the manufacturing process and improve the productivity by easily injecting and discharging a discharging gas. CONSTITUTION: An assembly of a plasma display device is installed in a positioning chamber. The assembly of a plasma display device and the positioning chamber is discharged, and the positioning chamber is heated. Then, the positioning chamber is cooled. When the temperature of the positioning chamber reaches a predetermined value, a discharging gas is injected into the positioning chamber. Then, the discharging gas is injected into the plasma display device, and the plasma display device is sealed.
Patent KR-20000039919-A (KR)
Title: Method for checking movement path of cellular phone
Inventor: KIM JONG KWANG
IPC: H04B1/38
Filed: 1998-12-16
Abstract: PURPOSE: A method for checking movement path of a cellular phone is provided to track previous movement path thereof according to a user's request by storing data on the movement path which comprises data on every locations to which the cellular phone has moved and time data on the movement of the cellular phone. CONSTITUTION: A controller(100) initializes(200) a parameter variable(n) for storing the data on the movement path to set it as "1". The controller(100) searches(210) data received from a base station in order to check if location message data is received. The controller(100) stores(220) the location message data and movement path data at the nth address of a memory(140) and displays the stored the movement path data. A hand-off detector(110) checks(230) whether a hand-off occurs. The parameter variable(n) is incremented by "1"(240) if the hand-off has occurred. The controller(100) determines if the parameter variable(n) is less than "N"(250).
Patent KR-20000041776-A (KR)
Title: Structure for mounting lifting jack of vehicle
Inventor: GWAK JEONG YOON
IPC: B60R11/06
Filed: 1998-12-23
Abstract: PURPOSE: A structure for mounting lifting jack of vehicle is provided to prevent occurrence of noise due to vibration of a vehicle when a lifting jack is fixed on the vehicle. CONSTITUTION: A structure for mounting lifting jack of vehicle, which is for mounting a hydraulic jack(20) to the side of a rear floor(5) of the vehicle, comprises a jack mounting bracket(100) which includes side wall portions for mounting to two opposing side walls(5a, 5b) of the corner portions of the rear floor(5), respectively; an arc shaped jack accommodating wall for enclosing the hydraulic jack(20) circumferentially, the wall being extended from the side wall portions; and projections for hooking band, which are formed to be bent on the opposite sides of the jack accommodating wall, wherein the side wall portions of the jack mounting bracket(100) is attached and mounted on the opposing side walls(5a, 5b) of the corner portions of the rear floor(5), the structure further comprises a rubber band(110) for fixing the hydraulic jack(20) positioned on the jack accommodating wall by being hooked on the projections for hooking band of the jack mounting bracket(100).
Patent KR-20000043135-A (KR)
Title: Body structure of front post lower end of side door body in vehicle
Inventor: LEE KWANG YEON
IPC: B62D25/02
Filed: 1998-12-28
Abstract: PURPOSE: A front post lower end body structure of a side door body in a vehicle is provided to prevent the damage of passengers by improving the reinforcing structure of the front post lower end and minimizing the body deformation upon side-on collision. CONSTITUTION: A locker reinforcing member(140) is connected to a lower end inner side of a side outer panel(10) and is extended up to a front face of a lower reinforcing member(12) of a front pillar. A third side outer panel reinforcing wall part(140A) is made up for corresponding to an outer shock. Since the force corresponding to a front shock is increased with the side outer panel and the front pillar lower reinforcing member(12) on a front-on collision, the absorption of front energy shock is increased so that the deformation of the side door body is reduced. Further, a second front pillar lower reinforcing member resists against a first side outer panel and is deformed by absorbing the shock energy with a third reinforcing wall upon the generation of excessive shock.
Patent KR-20000044107-A (KR)
Title: Spindle motor
Inventor: PARK SEONG JU
IPC: H02K29/00
Filed: 1998-12-30
Abstract: PURPOSE: A spindle motor is provided to enhance the productivity as well as facilitate the measurement management of a motor by avoiding a height variation of the motor. CONSTITUTION: A rotor(200) is extended from the center of a case(220) and has a boss(230) into which a rotation shaft(100) is inserted. A hub(300) is located on the upper side of the case(220) for a disc to be seated. A stator(400) is located on the lower side of the rotor(200), has a stator core(410) in which a screw hole(411) is formed, and has a coil(420) for generating an electromagnetic force together with a magnet(210) of the rotor(200). A plate(500) is provided on the lower side of the stator(400) and has a through hole(510) at a position corresponding to the screw hole(411).
Patent KR-20000044732-A (KR)
Title: Apparatus for processing caption text in atv system
Inventor: SHIN GWANG SEONG
IPC: H04N7/087
Filed: 1998-12-30
Abstract: PURPOSE: An apparatus for processing a caption text in an ATV(Advanced Television) system is provided to process a caption text by considering arrangement, a writing direction, a scroll direction, and a pen characteristic of the caption text. CONSTITUTION: An apparatus for processing a caption text in an ATV system comprises an MPEG decoder(202), a caption text detection and processing portion(204), a control portion(205), a memory(206), a mixing portion(207), and a video processing portion(208). The MPEG decoder decodes MPEG information included in video information. The caption text detection and processing portion detects a caption text and a caption command to provide a caption text detection signal and a caption command and the caption text according to the caption text processing control signal. The control portion controls storing character line information for processing caption and provides the caption text processing control signal to the caption text detection and processing portion. The memory stores the character line information. The mixing portion mixes the caption text and the video information. The video processing portion performs a process for displaying the video information on a screen.
Patent KR-20000045404-A (KR)
Title: High speed dram
Inventor: YUN HA RYONG
IPC: G11C7/10
Filed: 1998-12-30
Abstract: PURPOSE: A high speed DRAM is provided to improve each row and column operation during a continuous reading by changing the structure of a bit line and to embody the high speed by reducing the access time of data. CONSTITUTION: A bit line separating signal is enabled by inputting a bank selecting signal from a RAS signal of a generating device(100) for a bit line separating signal. The separating signal is disabled by inputting a sensing generating signal for generating a control signal of a sense amplifier after delaying for a certain time, passing through a rear delay unit. A bit line in a cell area and an area of a sense amplifier are completely separated by fully swing the separating signal from grounding potential up to high voltage. The time to generate the RAS signal again after generating the RAS signal is reduced. And the time to generate a CAS signal again after generating the CAS signal is also reduced because the CAS signal is generated again in the RAS to CAS time after generating the second RAS signal.
Patent KR-20000047327-A (KR)
Title: Method for manufacturing toothbrush having bristle tufts moving up and down
Inventor: KANG TAEK KYUN
IPC: A46D1/04
Filed: 1998-12-31
Abstract: PURPOSE: A method is provided to easily manufacture a toothbrush for the user, which makes bristle tufts flexible to adjust their length to the shape of teeth for use. CONSTITUTION: A toothbrush having bristle tufts moving up and down, comprises: a pad(3) which is passage capable of moving bristle; an elastic body(6) having elasticity for bristle; an injection mold(12) which blocks the inner part from the outside.
Patent KR-19990036009-A (KR)
Title: 음향 교정 장치
IPC: H04R5/02
Filed: 1996-07-25
Abstract: 음향 교정 장치(20)은 한 쌍의 좌우 입력 신호들을 처리하여 상기 입력 신호들이 사운드 시스템 내의 스피커를 통해 재생될 때 주파수의 함수로서 공간 왜곡을 보상한다.   좌우 입력 신호(26 및 28)들의 사운드-에너지는 제1 저주파 범위 및 제2 고주파 범위로 분리되어 교정된다.   최종 신호는 재결합되어, 사운드 시스템 내의 스피커에 의해 재생될 때 바람직한 음압 응답을 갖는 이미지-교정된 오디오 신호(27 및 29)들을 생성한다.   바람직한 음압 응답은 청취자에 대해 겉보기 사운드 이미지 위치를 생성한다.   그 다음, 이미지-교정된 오디오 신호(27 및 29)들은 공간적으로 강화되어 겉보기 사운드 이미지를 확장시킨다.
Patent KR-19990063833-A (KR)
Title: 헬리코박터 파이로리 단백질
IPC: A61K39/00
Filed: 1996-09-27
Abstract: 본 발명은 구균형 헬리코박터 파이로리(Helicobacter pylori)로부터 수득할 수 있는 신규한 항원성 단백질에 관한 것이다. 상기 항원성 단백질은 헬리코박터 파이로리의 검출 방법 및 백신의 제조에 사용할 수 있다. 또한, 본 발명은 구균형 헬리코박터 파이로리의 배양 방법을 제공한다.
Patent KR-19990067651-A (KR)
Inventor: HALIMI EDWARD M
IPC: F02B37/16
Filed: 1996-10-28
Abstract: 본 발명은 배기가스 구동 터보차저(56,156,76,96,196)가 엔진(54,66,74,90)의 배기구 및 흡기구에 연결되는 4 사이클 내연기관용 과급기 시스템에 관한 것이다.  전기모터구동압축기(62,68,84,114)는 병렬 연결로 공기량을 증가시키거나 직렬연결로 압력을 증가시키도록 터보차저(56,156,76,96,196)의 공기 압축기부의 유입구 또는 배출구 중 어느 하나에 연결된 배출구를 갖는다. 전기모터구동압축기(62,68,84,114)는 비연소 연료와 엔진 배압을 감소시키고 엔진가속을 증가시키는데 사용된다.
Patent KR-19990072052-A (KR)
Title: 발전장치
IPC: H02K21/22
Filed: 1997-10-14
Abstract: 회전축(32)의 주위에 배치된 고정자(38) 및 고정자(38)의 외주단부를 포위하는 환상부가 설치되어서 회전축(32)에 고착된 회전자(35)를 가지는 삼상교류발전기(11)와, 회전축(32)에 고착된 기어(33)에 맞물린 증속부(13) 및 증속부(13)에 결합한 수동회전 구동부(12)를 포함하고, 수동회전 구동부(12)의 회전에 의해, 삼상교류발전기(11)의 회전자(35)를 증속부(13) 및 기어(33)를 거쳐서 회전구동하고, 삼상교류발전기(11)에 발전동작을 행하게 하는 매뉴얼 회전구동기구와를 갖추어서 이루고, 삼상교류발전기(11)의 회전축(32)에 부착된 기어(33)의 지름이 회전축(32)의 지름보다 크게 되어 회전자(35)에 있어서의 환상부의 지름보다 작게 되도록 선정된다.
Patent KR-19990076835-A (KR)
Title: 제1 버스 프로토콜에 합치하는 장치를 외부 버스에 인터페이싱하는 방법 및 장치
IPC: G06F13/10
Filed: 1996-12-27
Abstract: 제1 버스 프로토콜에 합치하는 장치(8)를 제2 버스 프로토콜을 가지는 제2 버스(11)에 인터페이싱하고, 제2 버스(11)에 연결되는 지능 브리지(9)를 통하여 가상기능을 제공하는 방법 및 장치. 제2 버스(11)에 연결되어, 제2 버스 포맷의 어드레스들을 제1 버스 포맷의 어드레스로 번역하는 어드레스 번역기(35)가 제공된다. 제2 버스(11)로부터의 구성 사이클이 그 특정장치에 대한 것인지를 검출하기 위하여 장치 선택 검출회로(37)가 제공된다. 일단 구성 사이클이 검출되면, 인터럽트 발생회로(43)가 제1 로칼 프로세서 버스(13)에 연결된 로칼 프로세서(29)를 인터럽트시킨다. 장치 선택 검출회로(37)는 구성 제어기(39)에 배치된 레지스터(41)에 또한 기록한다. 구성 제어기(39)는 어드레스 번역기(35)의 기능을 제한하여, 로칼 프로세서 버스(13)로의 더 이상의 억세스가 차단되도록 한다.
Patent KR-19990081958-A (KR)
Title: 어레이 경계 검사 방법 및 장치와, 이를 포함하는 컴퓨터시스템
IPC: G06F9/455
Filed: 1997-01-23
Abstract: 본 발명은 어레이 액세스 경계 검사를 포함하는 개선된 프로세서와 컴퓨터 시스템에 관한 것으로서, 어레이 경계 검사 장치는 정보 어레이의 참조된 구성요소가 최대 어레이 크기 경계값과 최소 어레이 크기 경계값내에 있는지를 확인하도록 구성되고, 본 발명의 어레이 경계 검사 장치는 복수의 어레이 경계값을 저장하고 검색하는 연관 메모리 구성요소를 포함하고, 복수의 어레이 경계값은 각각 복수의 어레이 액세스 명령 중 하나와 연관되고, 입력부는 동시에 어레이 액세스 명령을 식별하는 어레이 액세스 명령 식별자와 저장된 어레이 참조 엔트리의 각각의 일부를 비교하고, 출력부는 어레이 경계 출력값으로서 연관 메모리 구성요소의 복수의 메모리 기억장소 중 하나에 저장된 복수의 어레이 경계값 중 하나를 제공하도록 구성되고, 제 1 비교 구성요소는 참조된 구성요소의 값과 최대 어레이 인덱스 경계값을 비교하여 참조된 구성요소의 값이 최대 어레이 인덱스 경계값보다 크면 최대 위반 신호를 제공하고, 제 2 비교 구성요소는 구성요소의 값과 최소 어레이 크기 경계값을 비교하여 구성요소의 값이 최소 어레이 경계값보다 작으면 최소 위반 신호를 제공하며, 최대 위반 신호 또는 최소 위반 신호 중 어느 한 신호로 예외가 발생하는 것을 특징으로 한다.
Patent KR-20000061000-A (KR)
Inventor: PARK JEONG HYEON
IPC: H04W24/00
Filed: 1999-03-22
Abstract: PURPOSE: A method for checking an intelligent type service of a switching network is provided for judging whether there is an error in a service based on a route-based characteristic of a switch station in accordance with a result of a comparison and analysis with a performance checking traffic data. CONSTITUTION: A performance data which occurs based on the current state of a switch station is gathered at one hour period and is accumulated for a certain time, for example, 8 weeks. An intermediate value and average value are computed based on the accumulated performance data(S300). A knowledge based data base is periodically updated based on an event occurrence circumference such as a date-based/time-based holiday and maintenance occurrence circumference and route shape information change data of the switch station.
Patent KR-20000061556-A (KR)
Inventor: KIM GYEONG IL
IPC: C07C229/00
Filed: 1999-03-27
Abstract: PURPOSE: A calcium salt of L-carnitine is provided which can be used for a healthy food, a food additive, and medical supplies. CONSTITUTION: The calcium salt of L-carnitine (formula 1) is produced by a method comprising the steps of: concentrating L-carnitine and a calcium halide preferably calcium chloride in the equivalent ratio of 1-1.5:1 to obtain the L-carnitine and the calcium in the ratio of 1:1 or concentrating the L-carnitine and the calcium chloride in the equivalent ratio of 2-2.5:1 to obtain the L-carnitine and the calcium in the ratio of 2:1; adding an alcohol as a main solvent to the concentrated liquid; heating and then cooling and crystallizing the resultant. In the formula, X is a halogen, L is an integer of 1-4, n is 1 when m is 1, n is 2 when m is 0.