Patents by Inventor Takafumi Kikuchi

Takafumi Kikuchi 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: 6834799
    Abstract: Provided is an IC card capable of downloading a card manager even after issuance of the IC card. A first card manager stored in the ROM of an IC card is made to be capable of downloading a privileged application, which is an application having a privilege, and a privileged API in the ROM is made accessible from the downloaded privileged application. When the privileged application accesses the privileged API, the privileged application can operate as the card manager, so that the IC card can download a card manager even after issuance of the IC card.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: December 28, 2004
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Masamoto Tanabiki, Kazuo Sakushima, Kazunori Inoue, Takafumi Kikuchi
  • Patent number: 6815746
    Abstract: The present invention provides a small-sized and inexpensive semiconductor device wherein a synchronous dynamic random access memory and a flash memory are built in a single encapsulater. A flash memory chip and a synchronous dynamic random access memory chip (SDRAM chip) are fixed to a main surface of a wiring board in a parallel state, and another SDRAM chip is fixed onto the flash memory chip. Electrodes for the respective semiconductor chips are respectively exposed and these electrodes are connected to their corresponding electrodes of the wiring board. An encapsulater formed of an insulating resin is formed on the main surface side of the wiring board so as to cover wires. Since the encapsulater is formed by cutting a block encapsulater formed by block molding by dicing, the side faces of the encapsulater result in cut surfaces. Bump electrodes are provided on the back surface of the wiring board in an array fashion.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: November 9, 2004
    Assignee: Renesas Technology Corp.
    Inventors: Makoto Suzuki, Takafumi Kikuchi, Norihiko Sugita, Seiichi Shirakawa
  • Publication number: 20040165413
    Abstract: The present invention provides a memory device that can safely hold much data necessary for using an Application (AP) therein. In the present invention, a memory device includes a first tamper resistant memory 41 that cannot be accessed directly by an electronic device and a second non-tamper resistant memory that cannot be directly accessed by the electronic device. The second memory is used to save data stored in the first memory 41 to. In this memory device, since data necessary for using many APs can be safely held in the device, any terminal device satisfying authorizing conditions can use the data held therein.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 26, 2004
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshihiko Takagi, Takafumi Kikuchi
  • Publication number: 20040164385
    Abstract: Of three chips (2A), (2B), and (2C) mounted on a main surface of a package substrate (1) in a multi-chip module (MCM), a chip (2A) with a DRAM formed thereon and a chip (2B) with a flash memory formed thereon are electrically connected to wiring lines (5) of the package substrate (1) through Au bumps (4), and a gap formed between main surfaces (lower surfaces) of the chips (2A), (2B) and a main surface of the package substrate (1) is filled with an under-fill resin (6). A chip (2C) with a high-speed microprocessor formed thereon is mounted over the two chips (2A) and (2B) and is electrically connected to bonding pads (9) of the package substrate (1) through Au wires (8).
    Type: Application
    Filed: December 5, 2003
    Publication date: August 26, 2004
    Inventors: Yoshiyuki Kado, Takahiro Naito, Toshihiko Sato, Hiraku Ikegami, Takafumi Kikuchi
  • Patent number: 6772955
    Abstract: A memory card includes a first nonvolatile memory, a second nonvolatile memory, and a separating portion. The first nonvolatile memory has a predetermined erase unit. The second nonvolatile memory has an erase unit that is larger than the erase unit of the first nonvolatile memory. The separating portion separates at least the portion of the program data that are downloaded onto the memory card that has the possibility of being rewritten, and stores the separated portion onto the first nonvolatile memory and stores the remaining portion onto the second nonvolatile memory.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: August 10, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuro Yoshimoto, Takayuki Tanaka, Miki Mizushima, Ryouichi Sugita, Takafumi Kikuchi
  • Publication number: 20040152489
    Abstract: The objective of the present invention is to provide a data processing apparatus that can employ together application programs for both a portable telephone and a contactless card terminal and that can communicate with an external device in accordance with a predetermined protocol by using, as needed, an appropriate application program, and a data processing method that uses this data processing apparatus.
    Type: Application
    Filed: December 4, 2003
    Publication date: August 5, 2004
    Inventors: Takafumi Kikuchi, Kyoko Kawaguchi, Yoshihiko Takagi, Atsushi Minemura
  • Publication number: 20040153559
    Abstract: One objective of the invention is to provide a hybrid portable communication terminal, as a data processing apparatus, that can employ together application programs for both a portable telephone and a contactless card terminal and that can communicate with an external device in accordance with a predetermined protocol by using, as needed, an appropriate application program, while another other objective is to permit a local server to identify each terminal.
    Type: Application
    Filed: December 4, 2003
    Publication date: August 5, 2004
    Inventors: Takafumi Kikuchi, Kyoko Kawaguchi, Yoshihiko Takagi, Atsushi Minemura, Kazuo Sakushima
  • Publication number: 20040130036
    Abstract: A compact multi-chip module having a high performance is provided. A plurality of first semiconductor chips for exchanging signals are surface-mounted on a surface of a mounting board. A second semiconductor chip with most of bonding pads thereof arranged along one side thereof is mounted back-to-back with at least one of the first semiconductor chips on the mounting board. The bonding pads of the second semiconductor chip and corresponding electrodes formed on the mounting board are connected by wire bonding. The first and second semiconductor chips and bonding wires on the mounting board are encapsulated with a sealing material.
    Type: Application
    Filed: November 18, 2003
    Publication date: July 8, 2004
    Applicants: Renesas Technology Corp., Shinko Electric Industries Co., Ltd.
    Inventors: Masanori Owaki, Toshikazu Ishikawa, Takahiro Naito, Makoto Suzuki, Takafumi Kikuchi, Takashi Ozawa
  • Publication number: 20030160102
    Abstract: A memory card includes a first nonvolatile memory, a second nonvolatile memory, and a separating portion. The first nonvolatile memory has a predetermined erase unit. The second nonvolatile memory has an erase unit that is larger than the erase unit of the first nonvolatile memory. The separating portion separates at least the portion of the program data that are downloaded onto the memory card that has the possibility of being rewritten, and stores the separated portion onto the first nonvolatile memory and stores the remaining portion onto the second nonvolatile memory.
    Type: Application
    Filed: July 12, 2002
    Publication date: August 28, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuro Yoshimoto, Takayuki Tanaka, Miki Mizushima, Ryouichi Sugita, Takafumi Kikuchi
  • Publication number: 20030146277
    Abstract: Provided is an IC card capable of downloading a card manager even after issuance of the IC card. A first card manager stored in the ROM of an IC card is made to be capable of downloading a privileged application, which is an application having a privilege, and a privileged API in the ROM is made accessible from the downloaded privileged application. When the privileged application accesses the privileged API, the privileged application can operate as the card manager, so that the IC card can download a card manager even after issuance of the IC card.
    Type: Application
    Filed: December 6, 2002
    Publication date: August 7, 2003
    Inventors: Masamoto Tanabiki, Kazuo Sakushima, Kazunori Inoue, Takafumi Kikuchi
  • Publication number: 20030075797
    Abstract: The present invention provides a small-sized and inexpensive semiconductor device wherein a synchronous dynamic random access memory and a flash memory are built in a single encapsulater. A flash memory chip and a synchronous dynamic random access memory chip (SDRAM chip) are fixed to a main surface of a wiring board in a parallel state, and another SDRAM chip is fixed onto the flash memory chip. Electrodes for the respective semiconductor chips are respectively exposed and these electrodes are connected to their corresponding electrodes of the wiring board. An encapsulater formed of an insulating resin is formed on the main surface side of the wiring board so as to cover wires. Since the encapsulater is formed by cutting a block encapsulater formed by block molding by dicing, the side faces of the encapsulater result in cut surfaces. Bump electrodes are provided on the back surface of the wiring board in an array fashion.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 24, 2003
    Inventors: Makoto Suzuki, Takafumi Kikuchi, Norihiko Sugita, Seiichi Shirakawa
  • Patent number: 5966407
    Abstract: A bus driving system includes n bus wires having data signal wires and control signal wires, (n-1) switching circuits constituting driver circuits at a transmitting end, a precharge circuitry for precharging (n-2) bus wires and (n-1)-th bus wire with a control circuit for redistributing wire capacitances of transmission lines formed by the bus wires, and a predischarge circuitry for predischarging n-th bus wire. The switching circuits control conduction and non-conduction between (n-2) bus wires, (n-1)-th bus wire and n-th bus wire, wherein the (n-2) switching circuits respond to (n-2) bit signals and a control signal, while the (n-1)-th switching circuit responds to the control signal. The signal from the transmitting end is detected by a detection circuit at a receiving end via the transmission lines.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: October 12, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuru Hiraki, Hirotsugu Kojima, Masaru Kokubo, Takafumi Kikuchi, Yuji Hatano, Kouki Noguchi, Masao Hotta
  • Patent number: 5739860
    Abstract: In a moving picture decoding apparatus, an output section is provided with a circuit for making a logic sum of control signals for renewing a picture data output, as a control signal for determining a picture data to be next outputted in a selected mode. Thereby, according to a request, newly decoded picture data is discarded or an inputted picture data is discarded without being decoded, and picture data which is currently being outputted is outputted again. In response to a control signal for renewing the output, decoded picture data to be outputted subsequently is outputted and picture data which is currently being outputted is discarded.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: April 14, 1998
    Assignees: Hitachi, Ltd., Sega Enterprises, Ltd.
    Inventors: Akio Hoshino, Takafumi Kikuchi, Tadashi Saitoh, Junichi Kimura, Yutaka Okunoki, Masao Oshimi
  • Patent number: 5719646
    Abstract: A train of coded input picture data carrying moving picture information includes at least one picture data which need to refer to another picture data and at least one coded picture data containing an error.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: February 17, 1998
    Assignees: Hitachi. Ltd., Sega Enterprises, Ltd.
    Inventors: Takafumi Kikuchi, Tadashi Saitoh, Yutaka Okunoki
  • Patent number: 5690893
    Abstract: An analyzer includes an exchangeable and consumable element such as a sensor, column or reagent the characteristic of which specifies an analyzing condition. The element is provided with a non-volatile semiconductor memory which holds an analyzing condition adapted for the element as data. When the element is mounted on an analyzer body, a controller of the analyzer reads the analyzing condition from the memory to update an analyzing condition inherently provided in the analyzer body. The result of analysis and/or operational history information of use of the element may be written into the memory with which the element is provided.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: November 25, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Ozawa, Takafumi Kikuchi, Yoshiki Murakami, Masaaki Nakai, Koutarou Yamashita, Toshiko Fujii, Yuji Miyahara, Yoshio Watanabe
  • Patent number: 5623533
    Abstract: In a mobile wireless communication end device having an electric power source including a cell, and a signal processing part and a transmitting-receiving part, to which electric power is applied from the electric power source, operation is performed in operation mode selected previously by the user when voltage of the electric power source is dropped. The signal processing part and the transmitting-receiving part have a normal operation mode operating at normal electric power and a low power operation mode operating at electric power lower than the normal operation mode.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: April 22, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Takafumi Kikuchi, Yuji Hatano, Koichi Seki, Masanori Otsuka, Masao Hotta, Yasuyuki Murakami