Patents Assigned to Fujitsu
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Patent number: 6292444Abstract: There is provided an optical storage device that can position a lens carriage and objective lens even when position sensors for the lens carriage and objective lens are excluded in an effort to make an optical disk unit thinner. When a seek of the carriage relative to an optical disk is started, the carriage is accelerated smoothly, decelerated smoothly, and thus positioned on a target track. The vibration of a lens actuator on the carriage occurring during seek can be minimized, and the lens actuator is locked substantially in the center of the carriage. During a seek operation of the carriage, a false lens signal equivalent to a lens signal used to lock the lens actuator in the center of the carriage is produced using the envelope of a tracking error signal obtained from reflected light of the light beam emanating from the optical disk. With the false lens signal, the lens actuator is locked in the center of the carriage.Type: GrantFiled: February 8, 1999Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Toru Ikeda, Masateru Sasaki, Akira Minami, Nobuhiko Isato, Shigeru Arai
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Patent number: 6292485Abstract: A system for downloading a software image to a SONET network element which eliminates the need for a separate overhead channel for this purpose. The system conveys the software image using the File Transfer Protocol (FTP) over the Transmission Control Protocol (TCP), over the Internet Protocol (IP), using ATM. The disclosed system enables ATM cells carrying the software image to be received over a SONET ring connected to the device. The disclosed system uses permanent virtual circuits (PVCs) between network elements over which the software image may be transported. In a first embodiment, the PVCs form a star of logical connections with remote network elements to which software image files may be downloaded from a “gateway” network element. The gateway network element is a network element communicative with a central management station, which provides data to be downloaded to the remote network elements.Type: GrantFiled: June 3, 1999Date of Patent: September 18, 2001Assignee: Fujitsu Network Communications, Inc.Inventors: Joseph G. Trotta, Jeffrey Holt, Terry A. Clouthier, Ted D. Chang
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Patent number: 6291895Abstract: The semiconductor device includes a semiconductor chip, a tape for mounting the semiconductor chip thereto, an adhesive resin layer interposed between the semiconductor chip and the tape, and solder balls attached to the tape. The method of fabricating the semiconductor chip comprises the step of forming at least one hole in the tape, after fixing the semiconductor chip to the tape through the adhesive resin layer. Also, the TAB tape is made of polyimide having high water permeability.Type: GrantFiled: June 18, 1999Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Fumihiko Taniguchi, Koji Honna, Yoshikazu Kumagaya
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Patent number: 6292426Abstract: A semiconductor memory device includes an SRAM provided on a chip, the SRAM including an SRAM cell array. A DRAM is provided on the chip, the DRAM including a DRAM cell array. An address input circuit receives an address signal, the address signal having a first portion and a second portion, the first portion carrying a unique value of row-column address information provided to access one of memory locations in one of the SRAM and DRAM cell arrays, the second portion carrying a unique value of SRAM/DRAM address information provided to select one of the SRAM and the DRAM.Type: GrantFiled: March 21, 2000Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Hitoshi Ikeda, Akihiro Funyu, Shinya Fujioka, Takaaki Suzuki, Masao Taguchi, Kimiaki Satoh, Kotoku Sato
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Patent number: 6292602Abstract: An optional transmission system is provided to realize generating a sub-signal without employing an exclusive optical source, determining normality of repeaters, and switching for sub-signal transmission when a failure occurs. The an optical signal transmission system includes first and second optical signal transmission devices connected each other through an optical transmission path. The first optical signal transmission device generates phase conjugation lights having first and second optical wavelengths, which are different each other, according to a main signal light having a first optical wavelength and an exciting light of a second optical wavelength, modulates intensity of the phase conjugation light of the second optical wavelength by a sub-signal, of which speed is lower than that of the main signal light, and concurrently transmits the first phase conjugation light and the second phase conjugation light, of which intensity is modulated by the sub-signal, through the optical transmission path.Type: GrantFiled: October 14, 1998Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventor: Yasuo Suzuki
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Patent number: 6292649Abstract: The invention provides a continuous medium printing apparatus which can exert a transporting force to act upon a continuous medium without additional provision of a new tractor mechanism or some other transport mechanism. In the continuous medium printing apparatus, upon automatic loading of a continuous medium, a control section controls a charging operation of a charging section so that a leading end portion of the continuous medium may be electrostatically attracted to an image forming drum. The image forming drum to which the continuous medium is attracted is rotated in a printing transporting direction to exert a transporting force to act upon the continuous medium to transport the continuous medium in the printing transporting direction. The present invention is applicable to an apparatus which prints on a continuous medium such as continuous recording paper (continuous paper), for example, by electrophotography.Type: GrantFiled: September 11, 2000Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Toshimasa Toyama, Kiyoshi Chinzei, Yasuharu Takeuchi, Katsuya Shimatsu, Makoto Maki, Naoto Hirao
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Patent number: 6290072Abstract: A library apparatus is capable of enhancing the dimensional accuracy of locker frame structures to allow an accessor to surely carry out the insertion/extraction of a cartridge into/from a storage unit or a deck. Each of the locker frame structures is made up of a top board, a base and sheet metal columns vertically standing between corner portions of the top board and the base. Each of the sheet metal columns is fixedly welded to the top board and the base from the inside of the locker. The library apparatus is applicable to a large-capacity external storage system storing a large number of cartridges such as magnetic tape cartridges and optical disk cartridges.Type: GrantFiled: March 27, 1998Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Kenichi Utsumi, Toshihito Kanetsuku, Takahisa Miyamoto, Yutaka Sugai, Osamu Ohmori
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Patent number: 6292289Abstract: The present invention relates to a method for transmitting a supervisory optical signal. A first optical amplifier for a first band (e.g., a conventional band: C band) determining a noise characteristic and a gain efficiency is provided. A second optical amplifier for a second band (e.g., a long wavelength band: L band) determining a noise characteristic and a gain efficiency is provided. The supervisory optical signal is processed in relation to one of the first and second optical amplifiers superior in at least one of the noise characteristic and the gain efficiency to the other. According to this method, undue degradation in the noise characteristic and the gain efficiency can be prevented to maintain a good transmission quality of a main signal.Type: GrantFiled: January 27, 2000Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Yasushi Sugaya, Terumi Chikama
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Patent number: 6292635Abstract: According to the present invention, there is provided a continuous medium printing apparatus including a printing section, a determining section, instructing unit, wherein the determining section is controlled in its reading operation for acquiring printed image data from continuous paper in accordance with first instructing signal supplied from the instructing unit, and the printing section is controlled in its printing operation on the continuous paper in accordance with a second instructing signal supplied from the instructing unit.Type: GrantFiled: March 20, 2000Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Motohiro Tokairin, Eiichi Sugisaki, Tamotsu Nishiura, Amiko Shimizubata
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Patent number: 6292714Abstract: A robot control part connected to a robot moving according to control for controlling the motion of the robot; and a media reproduction part to keep scenarios which describes changes in images to the passage of time, and are corresponding to events, present images according to the passage of time following the above scenario, and notify the passage of time at each frame to the robot control part; characterized in that the above robot control part keeps motion procedures denoting changes, which are corresponding to the frame, in the postures of the above robot to the passage of time; receives notifications of the passage of time from the above media reproduction part; and moves the above robot according to the above motion procedures, in the corresponding frame.Type: GrantFiled: February 5, 2001Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventor: Miwa Okabayashi
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Patent number: 6292885Abstract: An apparatus automatically estimates the effect of processing steps of procedures in parallel by computer. The apparatus collects SMF (system management function) records from an SMF data set that is in a magnetic disk, analyzes the SMF records, calculates series-processing time for processing the steps of the procedures in series, estimates, from the SMF records, time reduction produced by processing the steps of the procedures in parallel, and subtracts the time reduction from the series-processing time, to estimate parallel-processing time for processing the steps of the procedures in parallel.Type: GrantFiled: March 13, 1998Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Hajime Nakai, Tamotsu Honda, Makoto Komura
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Patent number: 6292452Abstract: An optical disk drive has an inserting/ejecting mechanism for performing an insertion and ejection of either a CD mounted on a CD carrier or an MO cartridge and a recording and reproducing mechanism for reading or reproducing with either medium. The inserting/ejecting mechanism has a load mechanism which is activated when a CD and a CD carrier on which the CD has been mounted or a medium as an MO cartridge are inserted in an inserting/ejecting port and moves the medium to the position of a spindle motor for attachment to a motor rotary shaft. In addition, an ejecting mechanism, which is activated on the basis of a medium ejecting instruction, moves the medium to an ejecting position of the inserting/ejecting port after the medium was removed from a spindle motor.Type: GrantFiled: September 26, 1996Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Tetsu Endo, Hideo Naso, Yoshiaki Hosokawa, Shigeaki Morita
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Patent number: 6290399Abstract: An optical submarine branching unit for branching a trunk cable into first and second branch cables, including a pressure housing having a cylinder and first and second covers, a branching circuit unit accommodated in the pressure housing, a first feed through assembly mounted to the first cover so as to extend therethrough, for introducing optical fibers of the trunk cable into the pressure housing, and second and third feed through assemblies mounted to the second cover so as to extend therethrough, for introducing optical fibers of the first and second branch cables into the pressure housing, respectively. The branching circuit unit has a feeding unit and an optical circuit unit completely separated from the feeding unit. Each feed through assembly includes a sleeve and a pin inserted in the sleeve. The pin has a plurality of bosses each having a plurality of axial grooves. Multiple layers of optical fibers are received in each axial groove and extend along the pin.Type: GrantFiled: March 3, 1998Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventor: Shuji Ogiya
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Patent number: 6292555Abstract: An operator connection system in which a telephone call from a customer having ever called is connected to an operator having ever served the particular customer, as far as possible. The operator connection system comprises an exchange for receiving calls from customers, a server for acquiring the calling subscriber number of each of the calls from the exchange through a CTI link, a customer database for storing the information items of the customers and operators therein, a plurality of client computers, and a private network. The server acquires the calling subscriber number of the call of the customer, and searches for the customer information corresponding to the number and the operator having ever served the particular customer. Further, the server searches for a telephone set and the client computer which are allocated to the specified operator, and it commands the exchange to bring the telephone set of the specified operator and that of the particular customer into line connection.Type: GrantFiled: February 27, 1998Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventor: Yoshiya Okamoto
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Patent number: 6292195Abstract: A color signal selection apparatus comprising a color space split unit for splitting a color space to which an inputted first color signal belongs, according to the first color signal, and a color signal selection unit for selecting second color signals from within color subspaces which have been formed by the splitting of the color space split unit, the second color signals being distributed on the color subspaces.Type: GrantFiled: March 23, 1998Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Masayoshi Shimizu, Shoji Suzuki, Satoshi Semba
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Patent number: 6291269Abstract: A semiconductor bare chip includes a plurality of stud bumps provided on the surface of the semiconductor bare chip body, each of the stud bumps including a seat and a head protruding from the seat. A height of the head is less than a thickness of electrodes on said board.Type: GrantFiled: October 1, 1999Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Hidehiko Kira, Kiyoshi Fukui, Kazuhisa Tsunoi, Shunji Baba
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Patent number: 6292881Abstract: A microprocessor capable of executing a process instruction having at least one RISC type instruction is constructed to include an instruction decoding section for decoding a microcode including information which indicates transfer contents of input and output data and address information which indicates a storage location of the process instruction, a data reading section for reading input data corresponding to the information which indicates the transfer contents of the input and output data decoded by the instruction decoding section and reading the process instruction corresponding to the address information, and an operation process executing section for implementing one or a plurality of operation unit resources capable of executing an operation process according to the input data read by the data reading section and the process instruction.Type: GrantFiled: February 25, 1999Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Ritsuko Tanaka, Yuji Nomura, Toru Tsuruta, Nobuyuki Iwasaki
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Patent number: 6292586Abstract: In a correlation arithmetic system adapted to detect a relative difference between two functions, an operation is simplified. This makes it possible to perform the operation with a small scale of hardware and also with great accuracy. There is adopted an operation g*h instead of the “product” in the correlation arithmetic operation. There is disclosed an arithmetic unit in which two numeral values a and b are inputted, and the two numerical values a and b are subjected to a predetermined operation process, so that a numerical value c representative of an operation result is derived. The arithmetic unit has an absolute value operation unit for evaluating an absolute value |c| of the numerical value c, and a sign operation unit for evaluating a sign “sing (c)” of the numerical value c.Type: GrantFiled: January 25, 1999Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventors: Susumu Kawakami, Hiroaki Okamoto, Motomu Takatsu
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Patent number: 6291291Abstract: The present invention is a semiconductor device having a capacitor employing ferroelectrics as a capacitor insulating film. The semiconductor device comprises a semiconductor substrate 11, an insulating film 12 formed on the semiconductor substrate 11, and a capacitor including (a) a lower electrode formed on the insulating film and made of a refractory metal whose face orientation (111) appears on an upper surface thereof, (b) a capacitor insulating film formed on the lower electrode and made of at least two layers consisting of a ferroelectrics film including Pb having a face orientation (111) and a ferroelectrics film including Pb having a face orientation (100), and (c) an upper electrode 15 formed on the capacitor insulating film 14.Type: GrantFiled: April 10, 2000Date of Patent: September 18, 2001Assignee: Fujitsu LimitedInventor: Hideyuki Noshiro
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Publication number: 20010021940Abstract: A method of updating reflection coefficients of a lattice filter is provided, which method includes the step of updating backward reflection coefficients by employing forward reflection coefficients which are updated so that a forward prediction error of a last stage of the lattice filter is minimized.Type: ApplicationFiled: January 23, 2001Publication date: September 13, 2001Applicant: FUJITSU LIMITEDInventors: Kensaku Fujii, Juro Ohga