Patents by Inventor Takao Kato
Takao Kato 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).
-
Patent number: 6335934Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetermined period and time slots contained in each frame to carry blocks.Type: GrantFiled: August 13, 1999Date of Patent: January 1, 2002Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Patent number: 6314096Abstract: In a packet switching system made up of a single or a plurality of switching nodes or local units each including a label conversion unit for accommodating a plurality of packet circuits and performing conversion into output port information of a switch on the basis of a logic channel on a packet circuit, a self-routing switch for performing switching on the basis of the output port information, land a control unit for terminating a control packet and performing the call processing function, and a switching node or tandem unit including a single or a plurality of self-routing switches for interconnecting the local units, there are provided a device for setting, between the tandem unit and a destination-side local unit, the same logic channel as that between an originating-side local unit operative for information transfer and the tandem unit in respect of a call destined for a local unit other than this local unit and a device, operable in the originating side local unit for information transfer, for insertingType: GrantFiled: December 20, 1999Date of Patent: November 6, 2001Assignee: Hitachi, Ltd.Inventors: Shirou Tanabe, Taihei Suzuki, Shinobu Gohara, Yoshito Sakurai, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Patent number: 6304570Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetrmined period and time slots contained in each frame to carry blocks.Type: GrantFiled: August 13, 1999Date of Patent: October 16, 2001Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Publication number: 20010028658Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetrmined period and time slots contained in each frame to carry blocks.Type: ApplicationFiled: June 5, 2001Publication date: October 11, 2001Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Publication number: 20010028652Abstract: An ATM switching system comprises a switch unit including a plurality of input ports and a plurality of output ports having the same cell transmission rate, and a multiplexer for multiplexing cell trains outputted from at least two output ports into a single cell train and outputting the cell train to a high-speed output line (and/or a demultiplexer for demultiplexing a cell train from an output port into a plurality of cell trains and outputting the cell trains to a plurality of low-speed output lines). The switch unit includes a buffer memory for temporarily storing cells inputted from the input ports while forming a queue chain for each output line to which each cell is to be outputted, a demultiplexer for distributing the cells read from the buffer memory among the output ports in circulation, and a buffer memory control circuit for controlling the write and read operation of cells with the shared buffer memory.Type: ApplicationFiled: June 8, 2001Publication date: October 11, 2001Inventors: Yoshito Sakurai, Kenichi Ohtsuki, Shinobu Gohara, Makoto Mori, Akira Horiki, Takao Kato, Hiroshi Kuwahara
-
Patent number: 6285675Abstract: An ATM switching system comprises a switch unit including a plurality of input ports and a plurality of output ports having the same cell transmission rate, and a multiplexer for multiplexing cell trains outputted from at least two output ports into a single cell train and outputting the cell train to a high-speed output line (and/or a demultiplexer for demultiplexing a cell train from an output port into a plurality of cell trains and outputting the cell trains to a plurality of low-speed output lines). The switch unit includes a buffer memory for temporarily storing cells inputted from the input ports while forming a queue chain for each output line to which each cell is to be outputted, a demultiplexer for distributing the cells read from the buffer memory among the output ports in circulation, and a buffer memory control circuit for controlling the write and read operation of cells with the shared buffer memory.Type: GrantFiled: January 12, 1999Date of Patent: September 4, 2001Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Kenichi Ohtsuki, Shinobu Gohara, Makoto Mori, Akira Horiki, Takao Kato, Hiroshi Kuwahara
-
Publication number: 20010005386Abstract: An ATM switching system comprises a switch unit including a plurality of input ports and a plurality of output ports having the same cell transmission rate, and a multiplexer for multiplexing cell trains outputted from at least two output ports into a single cell train and outputting the cell train to a high-speed output line (and/or a demultiplexer for demultiplexing a cell train from an output port into a plurality of cell trains and outputting the cell trains to a plurality of low-speed output lines). The switch unit includes a buffer memory for temporarily storing cells inputted from the input ports while forming a queue chain for each output line to which each cell is to be outputted, a demultiplexer for distributing the cells read from the buffer memory among the output ports in circulation, and a buffer memory control circuit for controlling the write and read operation of cells with the shared buffer memory.Type: ApplicationFiled: November 29, 2000Publication date: June 28, 2001Inventors: Yoshito Sakurai, Kenichi Ohtsuki, Shinobu Gohara, Makoto Mori, Akira Horiki, Takao Kato, Hiroshi Kuwahara
-
Publication number: 20010004477Abstract: A solution containing a metal component comprises composite ultrafine metal particles each having a core substantially made of a metal component and a covering layer made of an organic compound chemically bonded to the core. The core has an average diameter ranging from 1 to 10 nm. The composite ultrafine metal particles are uniformly dispersed in a solvent.Type: ApplicationFiled: December 11, 2000Publication date: June 21, 2001Inventors: Akira Fukunaga, Hiroshi Nagasawa, Takao Kato
-
Patent number: 6215788Abstract: An ATM switching system comprises a switch unit including a plurality of input ports and a plurality of output ports having the same cell transmission rate, and a multiplexer for multiplexing cell trains outputted from at least two output ports into a single cell train and outputting the cell train to a high-speed output line (and/or a demultiplexer for demultiplexing a cell train from an output port into a plurality of cell trains and outputting the cell trains to a plurality of low-speed output lines). The switch unit includes a buffer memory for temporarily storing cells inputted from the input ports while forming a queue chain for each output line to which each cell is to be outputted, a demultiplexer for distributing the cells read from the buffer memory among the output ports in circulation, and a buffer memory control circuit for controlling the write and read operation of cells with the shared buffer memory.Type: GrantFiled: April 16, 1999Date of Patent: April 10, 2001Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Kenichi Ohtsuki, Shinobu Gohara, Makoto Mori, Akira Horiki, Takao Kato, Hiroshi Kuwahara
-
Patent number: 6015976Abstract: Three-dimensional ultra-fine micro-fabricated structures of the order of .mu.m and less are produced for use in advanced optical communication systems and quantum effect devices. Basic components are an energy beam source, a mask member and a specimen stage. The mask member is an independent component, and various combinations of relative movements of the mask member with respect to the beam axis and/or workpiece can be made with high precision to produce curved or slanted surfaces on a workpiece, thereby producing multiple lines or arrays of convex or concave micro-lenses. Other examples of fine-structures include deposition of thin films in a multiple line pattern or in an array pattern. Because of flexibility of fabrication and material, labyrinth seals having curved surfaces with grooved structures can be used as friction reduction devices for bearing components. Fine groove dimensions of the order of nm are possible.Type: GrantFiled: November 18, 1998Date of Patent: January 18, 2000Assignees: Ebara Corporation, Yotaro HatamuraInventors: Masahiro Hatakeyama, Katsunori Ichiki, Takao Kato, Yotaro Hatamura, Masayuki Nakao
-
Patent number: 6016317Abstract: An ATM switching system comprises a switch unit including a plurality of input ports and a plurality of output ports having the same cell transmission rate, and a multiplexer for multiplexing cell trains outputted from at least two output ports into a single cell train and outputting the cell train to a high-speed output line (and/or a demultiplexer for demultiplexing a cell train from an output port into a plurality of cell trains and outputting the cell trains to a plurality of low-speed output lines). The switch unit includes a buffer memory for temporarily storing cells inputted from the input ports while forming a queue chain for each output line to which each cell is to be outputted, a demultiplexer for distributing the cells read from the buffer memory among the output ports in circulation, and a buffer memory control circuit for controlling the write and read operation of cells with the shared buffer memory.Type: GrantFiled: June 5, 1995Date of Patent: January 18, 2000Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Kenichi Ohtsuki, Shinobu Gohara, Makoto Mori, Akira Horiki, Takao Kato, Hiroshi Kuwahara
-
Patent number: 6005867Abstract: In a packet switching system made up of a single or a plurality of switching nodes or local units each including a label conversion unit for accommodating a plurality of packet circuits and performing conversion into output port information of a switch on the basis of a logic channel on a packet circuit, a self-routing switch for performing switching on the basis of the output port information, and a control unit for terminating a control packet and performing the call processing function, and a switching node or tandem unit including a single or a plurality of self-routing switches for interconnecting the local units, there are provided a device for setting, between the tandem unit and a destination-side local unit, the same logic channel as that between an originating, side local unit operative for information transfer and the tandem unit in respect of a call destined for a local unit other than this local unit and a device, operable in the originating-side local unit for information transfer, for insertingType: GrantFiled: May 11, 1995Date of Patent: December 21, 1999Assignee: Hitachi, Ltd.Inventors: Shirou Tanabe, Taihei Suzuki, Shinobu Gohara, Yoshito Sakurai, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Patent number: 5999537Abstract: A packet switching system which includes a device for setting, between a tandem unit and a destination local unit, the same logic channel as that between an originating local unit operative for information transfer and the tandem unit in respect of a call destined for a local unit other than the originating local unit and a device, operable in the originating-side local unit for information transfer, for inserting output port information of a self-routing switch inside the tandem unit into a packet destined for the local unit other than this local unit; in the tandem unit, setting of logic channel conversion information is not required to be done and even when any control signal packet from the originating local unit arrives at the tandem unit, the packet is transferred to the destination local unit without undergoing termination of packet and concomitant call processing control.Type: GrantFiled: April 23, 1997Date of Patent: December 7, 1999Assignee: Hitachi, Ltd.Inventors: Shirou Tanabe, Taihei Suzuki, Shinobu Gohara, Yoshito Sakurai, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Patent number: 5995510Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetermined period and time slots contained in each frame to carry blocks.Type: GrantFiled: July 30, 1997Date of Patent: November 30, 1999Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Patent number: 5978557Abstract: The object of the invention is to automatically select an optimum printing device according to the characteristics of a page in units of pages to print the page, thereby reducing the load on the operator in print processing. For this purpose, it is determined in units of pages whether data to be printed contains color information. If color information is present, a color flag is set to ON. When the color flag is ON, print data prepared and developed in a page buffer is sent to a color printer. When the color flag is OFF, the print data prepared and developed in the page buffer is sent to a monochromatic printer.Type: GrantFiled: March 25, 1997Date of Patent: November 2, 1999Assignee: Canon Kabushiki KaishaInventor: Takao Kato
-
Patent number: 5868952Abstract: Three-dimensional ultra-fine micro-fabricated structures of the order of .mu.m and less are produced for use in advanced optical communication systems and quantum effect devices. The basic components are an energy beam source, a mask member and a specimen stage. Because the mask member is an independent component, various combinations of relative movements of the mask member with respect to the beam axis and/or workpiece can be made with high precision to produce curved or slanted surfaces on a workpiece, thereby producing a multiple lines or arrays of convex or concave micro-lenses. Other examples of fine-structures include deposition of thin films in a multiple line pattern or in an array pattern. Because of the flexibility of fabrication method and material of fabrication, labyrinth seals having curved surfaces with grooved structures can be used as friction reduction means for bearing components. Fine groove dimensions of the order of nm are possible.Type: GrantFiled: March 18, 1996Date of Patent: February 9, 1999Assignees: Ebara Corporation, Yotaro HatamuraInventors: Masahiro Hatakeyama, Katsunori Ichiki, Takao Kato, Yotaro Hatamura, Masayuki Nakao
-
Patent number: 5852298Abstract: A micro-working apparatus performs fabrication and assembly tasks for micron/nanometer sized objects while progress of operations is observed in real-time by at least a pair of optical or electron microscopes to provide simultaneous views from at least two directions. This offers spatial visual information regarding the working space which is particularly critical in micro-working. Micro-working is further facilitated by the use of a micro-pallet device specially designed for use in the apparatus, but also offering other application possibilities. Rotational and parallel translation movements provided by the micro-pallet combined with the micro-working capability of the apparatus are utilized to enable production of micron-sized parts for use in advanced applications of optical and electronic devices.Type: GrantFiled: March 26, 1996Date of Patent: December 22, 1998Assignees: Ebara Corporation, Yotaro HatamuraInventors: Masahiro Hatakeyama, Katsunori Ichiki, Takao Kato, Masaaki Kajiyama, Takashi Tsuzuki, Yotaro Hatamura, Masayuki Nakao
-
Patent number: 5745495Abstract: A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetermined period and time slots contained in each frame to carry blocks.Type: GrantFiled: May 5, 1995Date of Patent: April 28, 1998Assignee: Hitachi, Ltd.Inventors: Yoshito Sakurai, Shinobu Gohara, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada
-
Patent number: 5739528Abstract: A fast atom beam source which can efficiently provide a fast atom beam having a diameter less than 1 .mu.m. The fast atom beam source has an ion source for ionizing a liquid metal to generate metal ions, a control electrode system for controlling the flux of metal ions, and a neutralizing chamber in which the ion beam is neutralized to generate a fast atom beam. The neutralizing chamber is disposed in a path of the ion flux. A neutralizing gas supply supplies a neutralizing gas into the neutralizing chamber, the neutralizing gas containing a metal element.Type: GrantFiled: November 14, 1996Date of Patent: April 14, 1998Assignee: Ebara CorporationInventor: Takao Kato
-
Patent number: 5740156Abstract: A packet switching system which includes a device for setting, between a tandem unit and a destination local unit, the same logic channel as that between an originating local unit operative for information transfer and the tandem unit in respect of a call destined for a local unit other than the originating local unit and a device, operable in the originating-side local unit for information transfer, for inserting output port information of a self-routing switch inside the tandem unit into a packet destined for the local unit other than this local unit. In the tandem unit, setting of logic channel conversion information is not required to be done and even when any control signal packet from the originating local unit arrives at the tandem unit, the packet is transferred to the destination local unit without undergoing termination of packet and concomitant call processing control.Type: GrantFiled: January 24, 1991Date of Patent: April 14, 1998Assignee: Hitachi, Ltd.Inventors: Shirou Tanabe, Taihei Suzuki, Shinobu Gohara, Yoshito Sakurai, Kenichi Ohtsuki, Takao Kato, Hiroshi Kuwahara, Eiichi Amada