Patents by Inventor Shuji Maeda
Shuji Maeda 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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Publication number: 20100150551Abstract: If opening and deleting of arbitrary optical pathways are repeated in a configuration where plural OADM nodes are connected to each other in a ring manner, empty waves in the ring are fragmented, and thus, it is necessary to optimize the optical pathways. When an optical pathway is opened from an OADM node to a different OADM node, transponders capable of connecting two routes to the OADM nodes and of setting different wavelengths for two routes are mounted in a state where there are no empty waves on a part of the route, so that an already-opened optical pathway is detoured to a detour route or a different wavelength in the OADM ring, and continuous empty waves are produced in a section to be opened so as to open a new optical pathway.Type: ApplicationFiled: December 3, 2009Publication date: June 17, 2010Inventors: Keiji YAMAHARA, Kenji KATAOKA, Shuji MAEDA, Hitoshi IHARA, Eriko SUGIOKA
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Publication number: 20100034205Abstract: In an MPLS or GMPLS network, links for hops of a communication path and adaptation to be implemented on the border of management domains or layers are automatically appropriately selected based on a service type or a requirement for maintenance. First, a unit that appends an identifier of a service to be provided and an attribute of the service to a communication path establishment control message, and requests path establishment is installed in a source node. Secondly, a unit that determines a requirement for maintenance of the communication path and adaptation on the basis of the service identifier and/or service attribute is installed in each node. Thirdly, maintenance attributes of network resources are compared with the requirement for maintenance in order to determine links and nodes through which the communication path passes. The determined links, nodes, and adaptation are designated as action parameters for a switching unit and/or interface unit.Type: ApplicationFiled: June 10, 2009Publication date: February 11, 2010Applicant: HITACHI COMMUNICATION TECHNOLOGIES, LTD.Inventors: Kazuhiro KUSAMA, Shuji MAEDA
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Publication number: 20080240120Abstract: In an MPLS/GMPLS network, a link used by a communication path for each hop and adaptations used at the boundary between management domains or layers are appropriately and automatically selected according to a service type and a required maintenance condition, without making a control sequence complicated. First, a unit for requesting path establishment by including an identifier of a service to be provided and a service attribute in a communication path establishment control message is provided for a source node. Second, a unit for determining a required maintenance condition for a communication path and adaptations according to the service identifier and/or the service attribute is provided for each node. Third, links and nodes through which the communication path passes are determined by comparing each of achievable maintenance conditions for network resources with the required maintenance condition.Type: ApplicationFiled: February 21, 2008Publication date: October 2, 2008Inventors: Kazuhiro Kusama, Shuji Maeda
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Patent number: 7263216Abstract: A pattern inspecting method and apparatus for inspecting a defect or defective candidate of patterns on a sample includes picking up an image of a sample by shifting a sampling position on the sample, measuring geometric distortion in an image of a standard sample, beforehand, and defining a size for which the measured geometric distortion is neglectable, obtaining a first image of the sample and a second image to be compared with the first image, dividing the first image and the second stage into images of a division unit having a size not greater than the defined size, comparing a divided image of the first image with a divided image of the second image, and for calculating a difference in gradation values between both of the divided images. The defect or the defect candidate of the sample is extracted in accordance with the difference in the gradation values.Type: GrantFiled: August 11, 2003Date of Patent: August 28, 2007Assignee: Hitachi, Ltd.Inventors: Chie Shishido, Yuji Takagi, Shuji Maeda, Takanori Ninomiya, Takashi Hiroi, Masahiro Watanabe, Hideaki Doi
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Patent number: 7225631Abstract: The invention provides an improved air chiller unit mounted on an aircraft for sending cooled air to service carts used for serving meals. An air chiller unit 1 includes a refrigeration cycle unit housed in a casing 10. The refrigeration cycle unit comprises a compressor 20, a condenser 30 and an evaporator 40 for a refrigerant, and the cooled air is sent to a galley via a blower device 60. The casing 10 is formed of honeycomb panels. The compressor 20 is supported via a pair of vibration isolation mounting devices 26 on a base plate of the casing 10. The vibration isolation mounting device 26 is formed of a triangular prism-shaped bracket and an A-shaped vibration isolation rubber, which functions to isolate vibration at normal times, and when a large load is received, functions to support the compressor device 20 with high spring constant with the rubber vibration isolator compressed.Type: GrantFiled: April 21, 2005Date of Patent: June 5, 2007Assignee: Jamco CorporationInventors: Masaji Ozaki, Shuji Maeda
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Publication number: 20060256711Abstract: Information that is not dependent on how a GMPLS switch or an MPLS router is set up (information independent of the type of GMPLS switch or MPLS router) is used to obtain attribute values of communication paths and manage communication path configurations in a communication network.Type: ApplicationFiled: July 21, 2006Publication date: November 16, 2006Inventors: Kazuhiro Kusama, Shuji Maeda
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Publication number: 20050235674Abstract: The invention provides an improved air chiller unit mounted on an aircraft for sending cooled air to service carts used for serving meals. An air chiller unit 1 includes a refrigeration cycle unit housed in a casing 10. The refrigeration cycle unit comprises a compressor 20, a condenser 30 and an evaporator 40 for a refrigerant, and the cooled air is sent to a galley via a blower device 60. The casing 10 is formed of honeycomb panels. The compressor 20 is supported via a pair of vibration isolation mounting devices 26 on a base plate of the casing 10. The vibration isolation mounting device 26 is formed of a triangular prism-shaped bracket and an A-shaped vibration isolation rubber, which functions to isolate vibration at normal times, and when a large load is received, functions to support the compressor device 20 with high spring constant with the rubber vibration isolator compressed.Type: ApplicationFiled: April 21, 2005Publication date: October 27, 2005Applicant: JAMCO CORPORATIONInventors: Masaji Ozaki, Shuji Maeda
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Publication number: 20040086170Abstract: A pattern inspecting method and apparatus for inspecting a defect or defective candidate of patterns on a sample includes picking up an image of a sample by shifting a sampling position on the sample, measuring geometric distortion in an image of a standard sample, beforehand, and defining a size for which the measured geometric distortion is neglectable, obtaining a first image of the sample and a second image to be compared with the first image, dividing the first image and the second stage into images of a division unit having a size not greater than the defined size, comparing a divided image of the first image with a divided image of the second image, and for calculating a difference in gradation values between both of the divided images. The defect or the defect candidate of the sample is extracted in accordance with the difference in the gradation values.Type: ApplicationFiled: August 11, 2003Publication date: May 6, 2004Inventors: Chie Shishido, Yuji Takagi, Shuji Maeda, Takanori Ninomiya, Takashi Hiroi, Masahiro Watanabe, Hideaki Dot
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Patent number: 6707733Abstract: A semiconductor memory device comprises memory cell blocks, a first redundancy cell array for each of the memory blocks, a redundancy cell block, a second redundancy cell array for the redundancy block, a first defect rescuing circuit configured to output a replacement signal for replacing a defective cell array in the redundancy block with the first redundancy array, and a second defect rescuing circuit configured to output a replacement signal for replacing a defective memory block with the redundancy block, wherein the first defect rescuing circuit has a gate circuit which outputs the output replacement signal of the first address sensing circuit as valid at an address at which the second defect rescuing circuit is not implemented, and which outputs a signal indicating which block is a defective block outputted by the second defect rescuing circuit as valid at an address at which the second defect rescuing circuit is implemented.Type: GrantFiled: December 13, 2002Date of Patent: March 16, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Tadayuki Taura, Shigeru Atsumi, Shuji Maeda
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Patent number: 6614923Abstract: For purpose of providing a defect inspecting method and an apparatus thereof and a defect inspecting method on basis of electron beam image and an apparatus thereof, reducing possibility of bringing erroneous or false reports due to the test objection side and the inspecting apparatus side, being caused by discrepancies, such as the minute difference in pattern shapes, the difference in gradation values, the distortion or deformation of the patterns, the position shift, thereby enabling the detection of the defects or the defective candidates in more details, wherein an image which is small in distortion by controlling the electron beam scanning is detected and divided into a size so as to be able to neglect therefrom, and then position shift detection and defect decision are carried out in an accuracy less or finer than pixel for each division unit. In the defect decision, a desired tolerance can be set up depending upon changes in gradation values and the position shift.Type: GrantFiled: January 6, 1999Date of Patent: September 2, 2003Assignee: Hitachi, Ltd.Inventors: Chie Shishido, Yuji Takagi, Shuji Maeda, Takanori Ninomiya, Takashi Hiroi, Masahiro Watanabe, Hideaki Doi
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Publication number: 20030117867Abstract: A semiconductor memory device comprises memory cell blocks, a first redundancy cell array for each of the memory blocks, a redundancy cell block, a second redundancy cell array for the redundancy block, a first defect rescuing circuit configured to output a replacement signal for replacing a defective cell array in the redundancy block with the first redundancy array, and a second defect rescuing circuit configured to output a replacement signal for replacing a defective memory block with the redundancy block, wherein the first defect rescuing circuit has a gate circuit which outputs the output replacement signal of the first address sensing circuit as valid at an address at which the second defect rescuing circuit is not implemented, and which outputs a signal indicating which block is a defective block outputted by the second defect rescuing circuit as valid at an address at which the second defect rescuing circuit is implemented.Type: ApplicationFiled: December 13, 2002Publication date: June 26, 2003Inventors: Tadayuki Taura, Shigeru Atsumi, Shuji Maeda
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Patent number: 6449802Abstract: A hinge member 50 of the present invention for rotatably mounting a moving member (door) 10 to a fixed member (opening in a wall member) 11 includes a support plate 51 provided with a mounting means for mounting to the fixed member 11, and a hinge flange 53 provided with a mounting means for mounting to the moving member. The support plate 51 and the hinge flange 53 are rotatably connected so as to pivot around a hinge pin 55. The hinge flange 53 has a first hinge flange 53A connected to the hinge pin 55, and a second hinge flange 53B provided with a sealing member 70 made of a flexible material, and a mounting means 533 for mounting to the moving member 10, the second hinge flange 53B is provided in right angle to the first hinge flange 53A, the first hinge flange 53A forms a gap between the fixed member 11 and the moving member 10, and the sealing member has the composition of sealing the gap.Type: GrantFiled: January 3, 2001Date of Patent: September 17, 2002Assignee: Jamco CorporationInventor: Shuji Maeda
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Publication number: 20010005921Abstract: A hinge member 50 of the present invention for rotatably mounting a moving member (door) 10 to a fixed member (opening in a wall member) 11 includes a support plate 51 provided with a mounting means for mounting to the fixed member 11, and a hinge flange 53 provided with a mounting means for mounting to the moving member. The support plate 51 and the hinge flange 53 are rotatably connected so as to pivot around a hinge pin 55. The hinge flange 53 has a first hinge flange 53A connected to the hinge pin 55, and a second hinge flange 53B provided with a sealing member 70 made of a flexible material, and a mounting means 533 for mounting to the moving member 10, the second hinge flange 53B is provided in right angle to the first hinge flange 53A, the first hinge flange 53A forms a gap between the fixed member 11 and the moving member 10, and the sealing member has the composition of sealing the gap.Type: ApplicationFiled: January 3, 2001Publication date: July 5, 2001Applicant: Jamco Corporation, Tokyo, JapanInventor: Shuji Maeda
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Patent number: 6094135Abstract: A antitheft apparatus for hindering theft by an intruder when the intruder is detected in an alarm mode without operator.Type: GrantFiled: July 24, 1997Date of Patent: July 25, 2000Assignee: Secom Co., Ltd.Inventors: Toshinori Sugimoto, Shuji Maeda, Toshinori Nakamura
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Patent number: 5786793Abstract: A compact antenna for circular polarization comprises a substrate of a dielectric material which is formed on its bottom surface with a ground plane and on its top surface with four planar rectangular patches of an electrically conductive material. The four patches are mounted in a coplanar relation on the top surface of the substrate, and arranged along four sides of a square pattern with the length of each patch angled at 90.degree. with respect to the length of the two adjacent patches. Each of the four patches is short-circuited to the ground plane at a shorting point located at a corner of the square pattern. A 90.degree. hybrid circuit is connected to directly feed only the two adjacent patches with a phase difference of 90.degree. to thereby define these two patches as active antenna elements which are fed with 0.degree. and 90.degree. signals, respectively.Type: GrantFiled: August 8, 1997Date of Patent: July 28, 1998Assignee: Matsushita Electric Works, Ltd.Inventors: Shuji Maeda, Tsutomu Kobayashi, Munehiko Itoh, Raj Mittra, Ikmo Park, Supriyo Dey
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Patent number: 5124415Abstract: A method of preparing a film-forming polyphenylene oxide (PPO) composition as well as a laminate using such composition, wherein a setting means selected from the group consisting of a crosslinking monomer, a crosslinking polymer, and mixtures thereof, and, optionally, an initiator are added to and mixed with PPO, and a sufficient film-forming property is provided to PPO by allowing the setting means and, if present, the initiator to crosslink, whereby the PPO composition has the ability to form a film. Further, when a plurality of such films are stacked and integralized to form a metal-clad laminate, the laminate exhibits low dielectric constant and loss, so as to be used effectively in superhigh frequency bands such as the X band used for satellite communication.Type: GrantFiled: July 13, 1989Date of Patent: June 23, 1992Assignee: Matsushita Electric Works, Ltd.Inventors: Takaaki Sakamoto, Munehiko Itoh, Shuji Maeda, Tetsuya Takanaga
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Patent number: 4874826Abstract: A method of preparing a film-forming polyphenylene oxide (PPO) composition as well as a laminate using such composition, wherein a setting means selected from the group consisting of a crosslinking monomer, a crosslinking polymer, and mixtures thereof, and, optionally, an initiator are added to and mixed with PPO, and a sufficient film-forming property is provided to PPO by allowing the setting means and, if present, the initiator to crosslink, whereby the PPO composition has the ability to form a film. Further, when a plurality of such films are stacked and integralized to form a melt-clad laminate, the laminate exhibits low dielectric constant and loss, so as to be used effectively in superhigh frequency bands such as the X band used for satellite communication.Type: GrantFiled: February 19, 1988Date of Patent: October 17, 1989Assignee: Matsushita Electric Works, Ltd.Inventors: Takaaki Sakamoto, Munehiko Itoh, Shuji Maeda