Patents by Inventor Koji Iwamoto
Koji Iwamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6487226Abstract: A semiconductor light emitting device having a structure including an active layer between a p-type cladding layer and an n-type cladding layer on a base body comprises at least one of the p-type cladding layer and the n-type cladding layer has a lattice mismatch relative to the base body not smaller than 2.0×10−4 and not larger than 3.0×10−3 or not smaller than −1.5×10−3 and not larger than −2.0×10−4. Another semiconductor light emitting device comprises at least one of the p-type cladding layer and the n-type cladding layer and the active layer have a lattice mismatch relative to the base body not smaller than 2.0×10−4 and not larger than 3.0×10−3 or not smaller than −1.5×10−3 and not larger than −2.0×10−4.Type: GrantFiled: September 1, 1998Date of Patent: November 26, 2002Assignee: Sony CorporationInventors: Koji Iwamoto, Hiroki Nagasaki, Shoichiro Matsunaga, Shoji Hirata
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Publication number: 20020078207Abstract: An online system recovery method by which, when an error takes place in an active online system, changeover is carried out to a stand-by online system to continue operation. The method includes the steps of transferring log information about a reference history indicative of a history of reference operation carried out in the active online system and about an update history indicative of a history of update operation to the stand-by online system; performing tracing operation to make contents of an I/O buffer in the stand-by online system to coincide with contents of an I/O buffer in the active online system according to the transferred log information; and monitoring an operating state of the active online system now executing transaction operation and, when an error in the active online system was detected, causing the stand-by online system to continue the transaction operation.Type: ApplicationFiled: December 12, 2001Publication date: June 20, 2002Applicant: Hitachi, Ltd.Inventor: Koji Iwamoto
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Patent number: 6404593Abstract: A two-piece load beam mounting system supports a load beam in operating proximity to a disk, the mounting system comprising a small mount less subject to flatness problems, the mount having a plate and a central boss, the mount plate having lateral and longitudinal dimensions less than the base portion corresponding dimensions, and a support having lateral and longitudinal dimensions to register with the base portion when the support is sandwiched between the mount and the load beam base portion in attached relation to each; the support and mount plate cooperating to have their combined height no greater than the height of the support to achieve a greater stiffness in the mount system without increasing the height.Type: GrantFiled: June 12, 2000Date of Patent: June 11, 2002Assignee: Magnecomp Corp.Inventor: Alejandro Koji Iwamoto
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Patent number: 6404595Abstract: A lower cost metal layer free flexible conductive laminate segment is connected to a relatively smaller amount of the more expensive metal layer containing flexible conductive laminate segment to connect a slider to signal circuitry in a cost efficient way while avoiding biasing of the slider movement by the conductor.Type: GrantFiled: October 12, 2000Date of Patent: June 11, 2002Assignee: Magnecomp CorporationInventor: Alejandro Koji Iwamoto
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Patent number: 6373665Abstract: A low manufacturing cost electrical connector for a disk drive suspension comprises lower cost, metal layer-free first flexible conductive laminate segment to connect to signal circuitry, a more expensive metal layer containing flexible conductive laminate second segment to connect to a slider, and a lower cost, easily variously shaped jumper segment supported on the actuator arm and coupled between said first and second segments to connect the slider to the signal circuitry in a manufacturing cost efficient way.Type: GrantFiled: October 12, 2000Date of Patent: April 16, 2002Assignee: Magnecomp Corp.Inventor: Alejandro Koji Iwamoto
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Publication number: 20020034204Abstract: There is provided a long-life and highly reliable air ridge type semiconductor laser device having a multi-layer structure including a first cladding layer of n-Al0.7GaInP, an active layer of AlGaAs, a second cladding layer of p-Al0.7GaInP and a contact (capping) layer of p-GaAs epitaxially grown in this sequential order on a substrate of n-GaAs, in which the contact layer and an upper portion of the second cladding layer is etched to be a ridge stripe, and the second cladding layer comprises an upper layer, which constitutes the ridge stripe together with the contact layer, and a lower layer having a thickness of 0.3 &mgr;m, which is positioned below the upper layer and extend outwardly from the both lower ends of the upper layer, and further, the semiconductor laser device includes a protection layer being an epitaxially grown n-GaAs layer having a film thickness of 0.Type: ApplicationFiled: September 13, 2001Publication date: March 21, 2002Inventors: Koji Iwamoto, Hiroki Nagasaki
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Patent number: 6335847Abstract: An improved disk drive suspension in which the load beam rail section is of reduced length, the base portion, defined by an extended mounting plate, increased in length, and the spring portion therebetween increased in length. The load beam rail section is laminated with a flexure substantially as wide as the rail section providing a very rigid structure. The centers of gravity of the load beam and flexure are closely approximate such that their reaction moment under shock is small, limiting the 2nd bending mode reaction of the load beam in favor of the 1st bending mode reaction, so that the slider carried by the load beam and flexure is kept flat to the disk against damaging the disk upon recontact.Type: GrantFiled: August 6, 1998Date of Patent: January 1, 2002Assignee: Nagnecomp Corp.Inventors: Amanullah Khan, Alejandro Koji Iwamoto
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Patent number: 6205003Abstract: The efficiency of wire bundle conductors is realized in a disk drive suspension without wire bundle biasing of the slider movement by interposing a section of flexible conductive laminate conductor between the wire bundle terminus and the slider, thereby obtaining the nearly bias free connection of the flexible conductive laminate conductor to the slider and as well substantially the superior electrical performance of the wire bundle conductor.Type: GrantFiled: May 3, 1999Date of Patent: March 20, 2001Assignee: Magnecomp Corp.Inventor: Alejandro Koji Iwamoto
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Patent number: 6172854Abstract: A low manufacturing cost electrical connector for a disk drive suspension comprises lower cost, metal layer-free first flexible conductive laminate segment to connect to signal circuitry, a more expensive metal layer containing flexible conductive laminate second segment to connect to a slider, and a lower cost, easily variously shaped jumper segment supported on the actuator arm and coupled between said first and second segments to connect the slider to the signal circuitry in a manufacturing cost efficient way.Type: GrantFiled: March 24, 2000Date of Patent: January 9, 2001Assignee: Magnecomp Corp.Inventor: Alejandro Koji Iwamoto
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Patent number: 6169643Abstract: A lower cost metal layer free flexible conductive laminate segment is connected to a relatively smaller amount of the more expensive metal layer containing flexible conductive laminate segment to connect a slider to signal circuitry in a cost efficient way while avoiding biasing of the slider movement by the conductor.Type: GrantFiled: May 3, 1999Date of Patent: January 2, 2001Assignee: Magnecomp Corp.Inventor: Alejandro Koji Iwamoto
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Patent number: 6154132Abstract: The present invention relates to a display system for a theft-preventing apparatus mounted on a vehicle, and an object of the present invention is to provide a display system in which a display device can be commonly used for two kinds of theft-preventing apparatuses. A security ECU (20) outputs a continuous lighting signal when set to a waiting state, and stops outputting the signal in a cautioning state. An immobilizer ECU (22) outputs a blinking signal to a light-emitting device (50) only when the cautioning state is set. Accordingly, the light-emitting device (50) is turned off when both the security apparatus and the immobilizer apparatus are set to a resting state. Additionally, the light-emitting device (50) is continuously lighted when the security apparatus is in the waiting state. Further, the light-emitting device (50) is being blinked when the security apparatus is not set to the waiting state and the immobilizer apparatus is set to the cautioning state.Type: GrantFiled: August 24, 1999Date of Patent: November 28, 2000Assignee: Toyota Jidosha Kabushiki KaishaInventors: Koji Iwamoto, Manabu Mizutani, Masachika Kamiya, Takao Akatsuka
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Patent number: 6141685Abstract: There is provided a digital information supply and management system comprising a supply unit, a management unit, and a terminal unit, in which digital information including digital video and audio information is supplied from the supply unit to the terminal unit, and the management unit manages utilization of the digital information in the terminal unit. In this system, the supply unit comprises digital information generating means for generating the digital information; management information generating means for generating management information for the digital information; and information synthesis means for synthesizing the digital information and the management information to generate synthetic information. The management unit comprises accumulating means for receiving reported contents from the terminal unit.Type: GrantFiled: September 16, 1997Date of Patent: October 31, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Koji Iwamoto
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Patent number: 6133649Abstract: A vehicle antitheft system and method which effect re-registration and erasure of codes without using a tool used exclusively for such purposes. By the time T1 seconds has elapsed from the time a master key, in which a code is registered, is inserted into a key cylinder, turning an ignition switch from off to on is repeated five times. When opening and closing of a door is repeated six times and the ignition switch is turned off and the key is removed from the key cylinder in the next T2 seconds, a mode is changed to a master key code registration mode. When a master key whose code is to be registered is inserted into the key cylinder within T3 seconds from the time when a master key in which a code is registered is removed from the key cylinder, and the ignition switch is turned on within T4 seconds, an identification code to be registered is read from a transponder. When T5 seconds has elapsed, the read identification code is registered in the memory as a registered code.Type: GrantFiled: January 12, 1998Date of Patent: October 17, 2000Assignee: Toyota Jidosha Kabushiki KaishaInventors: Koji Iwamoto, Motoshi Kondo, Masachika Kamiya, Takao Akatsuka
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Patent number: 6018871Abstract: A disk drive suspension load beam having reduced mass for lessened shock in use and progressively modified stiffness and torsion values from its rearward portion to its forward portion is provided by trenching the rearward and/or intermediate portions to form on the flexure bearing, or opposite, face of the load beam a longitudinal series of transverse grooves in the rearward portion and in the intermediate portion inside the edge margin thereof, suitably cross-ribbed for stiffness, the rearward portion trenches being on the opposite face unless the intermediate portion is also trenched.Type: GrantFiled: January 20, 1998Date of Patent: February 1, 2000Assignee: Magnecomp Corp.Inventors: Aman Khan, Carlos Sanchez, Koji Iwamoto
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Patent number: 5969905Abstract: A liftable disk drive suspension load beam of spring steel comprises a base portion, a spring portion, an elongated beam portion having left and right edge rails, and a lift tip beyond the elongated beam portion. The beam portion has a longitudinally disposed flexure support tongue defining an attachment locus for attaching a flexure in cantilevered relation and having a situs for gimballing dimple contact with the flexure. The beam portion has left and right continued extents on either side of the tongue, these continued extents being, free of connection to said the support tongue fore and aft of the flexure attachment locus, the extents being joined beyond the attachment locus to support the lift tip from the elongated beam portion. The flexure tongue provides the flexure freedom of gimballing movement free of interference from the lift tip and the continued extents.Type: GrantFiled: February 12, 1998Date of Patent: October 19, 1999Assignee: Magnecomp CorporationInventors: Alejandro Koji Iwamoto, Amanullah Khan, Warren Coon
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Patent number: 5953357Abstract: An AlGaInP-based buried-ridge semiconductor laser includes an n-type GaAs current blocking layer 8 buried in opposite sides of a ridge stripe portion 7 which is made of an upper-layer portion of a p-type AlGaInP cladding layer 4, p-type GaInP intermediate layer 5 and p-type GaAs contact layer 6. The ridge stripe portion 7 includes tapered regions 7a having the length of L1 at cavity-lengthwise opposite ends of the ridge stripe portion 7.Type: GrantFiled: August 28, 1997Date of Patent: September 14, 1999Assignee: Sony CorporationInventors: Shoji Hirata, Shiro Uchida, Koji Iwamoto, Hiroki Nagasaki, Tsuyoshi Tojyo
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Patent number: 5901016Abstract: The efficiency of wire bundle conductors is realized in a disk drive suspension without wire bundle biasing of the slider movement by interposing a section of flexible conductive laminate conductor between the wire bundle terminus and the slider, thereby obtaining the nearly bias free connection of the flexible conductive laminate conductor to the slider and as well substantially the superior electrical performance of the wire bundle conductor.Type: GrantFiled: July 21, 1997Date of Patent: May 4, 1999Assignee: Magnecomp Corp.Inventor: Alejandro Koji Iwamoto
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Patent number: 5877921Abstract: An improved resonance and non-operating shock performance, low debris-generating disk drive suspension head gimbal assembly for positioning a head at a disk in which the load beam body is locally relieved or deflected to provide shelter for the portion of the flexure usually in the path of the lift arm against debris causing contact of the lift arm with the flexure edges and distortion of the flexure from lift arm contact in a load beam unsupported condition. The local relief reduces the load beam mass for high shock performance; the modification of the load beam contour improves stiffness and thereby improves resonance qualities.Type: GrantFiled: June 10, 1997Date of Patent: March 2, 1999Assignee: Magnecomp Corp.Inventors: Warren Coon, Aman Khan, Koji Iwamoto
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Patent number: 5875070Abstract: Optimized stiffness in a disk drive suspension comprising a load beam and a flexure structure is realized by forming the flexure structure from a flexure and a flexible conductor in which the conductor is a laminate of conductive metal and plastic and has an easily controlled and relatively higher spring constant, while the flexure has a relatively lower spring constant.Type: GrantFiled: October 4, 1996Date of Patent: February 23, 1999Assignee: Magnecomp Corp.Inventors: Aman Khan, Daniel Vera, Koji Iwamoto
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Patent number: 5859950Abstract: An MPU 1 decomposes video-audio information which is externally inputted and stored into a second temporary storage area 32 for each parameter included in a sequence layer and the like, and further into video information and audio information, and stores the information into a third temporary storage area 33. Next, the MPU 1 extracts a predetermined quality deterioration parameter from the parameters stored in the third temporary storage area 33 and stores a prescribed value in the storage area in which that quality deteriaration parameter was stored. The MPU 1 then composes the video-audio information stored in the third temporary storage area 33 again and stores the composed video-audio information (quality deteriorated) into a fourth temporary storage area 34.Type: GrantFiled: October 17, 1996Date of Patent: January 12, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Koji Iwamoto