Patents by Inventor Tetsu Takahashi

Tetsu Takahashi 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).

  • Publication number: 20240399454
    Abstract: Provided are a silver powder that when used as a conductive paste, has low tendency to experience disconnection even with reduced line width and has lower volume resistivity than is conventionally the case, a conductive paste containing such a silver powder as a conductive filler, and a method of producing such a silver powder. The silver powder is a collection of silver particles that has an apparent density of not less than 8.2 g/cm3 and not more than 9.2 g/cm3 and a value of not less than 1.1 and not more than 1.4 for a ratio of length of a perimeter in a particle cross-section for the silver particles and length of a line circumscribing a periphery of the particle cross-section.
    Type: Application
    Filed: September 27, 2022
    Publication date: December 5, 2024
    Applicant: DOWA Electronics Materials Co., Ltd.
    Inventors: Masanori FUJII, Tetsu TAKAHASHI, Koji HIRATA, Taro NAKANOYA
  • Patent number: 11870418
    Abstract: An acoustic wave device includes first and second acoustic wave elements. The first acoustic wave element is disposed on a piezoelectric substrate, and includes at least one first IDT electrode. The second acoustic wave element is disposed on the piezoelectric substrate, and includes at least one second IDT electrode. The first and second acoustic wave elements are adjacent to each other in the direction of acoustic wave propagation. A diffracting component that diffracts an acoustic wave is disposed between the first IDT electrode and the second IDT electrode. The diffracting component includes a gap that defines and functions as a slit to diffract an acoustic wave.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: January 9, 2024
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Toru Yamaji, Tetsu Takahashi
  • Patent number: 11863161
    Abstract: An acoustic wave filter includes a first resonance circuit including a first series arm resonator and a first capacitive element. The first series arm resonator is provided on a path connecting a first terminal and a second terminal. The first capacitive element is coupled in parallel with the first series arm resonator. The first series arm resonator includes a first divided resonator and a second divided resonator coupled in series with each other. The first resonance circuit includes a second resonance circuit including the first divided resonator and a second capacitive element coupled in parallel with the first divided resonator.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: January 2, 2024
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Tetsu Takahashi, Toru Yamaji, Takuma Kuzushita
  • Publication number: 20210265970
    Abstract: An acoustic wave device includes first and second acoustic wave elements. The first acoustic wave element is disposed on a piezoelectric substrate, and includes at least one first IDT electrode. The second acoustic wave element is disposed on the piezoelectric substrate, and includes at least one second IDT electrode. The first and second acoustic wave elements are adjacent to each other in the direction of acoustic wave propagation. A diffracting component that diffracts an acoustic wave is disposed between the first IDT electrode and the second IDT electrode. The diffracting component includes a gap that defines and functions as a slit to diffract an acoustic wave.
    Type: Application
    Filed: January 29, 2021
    Publication date: August 26, 2021
    Inventors: Toru YAMAJI, Tetsu TAKAHASHI
  • Publication number: 20210203306
    Abstract: An acoustic wave filter includes a first resonance circuit including a first series arm resonator and a first capacitive element. The first series arm resonator is provided on a path connecting a first terminal and a second terminal. The first capacitive element is coupled in parallel with the first series arm resonator. The first series arm resonator includes a first divided resonator and a second divided resonator coupled in series with each other. The first resonance circuit includes a second resonance circuit including the first divided resonator and a second capacitive element coupled in parallel with the first divided resonator.
    Type: Application
    Filed: December 1, 2020
    Publication date: July 1, 2021
    Inventors: Tetsu TAKAHASHI, Toru YAMAJI, Takuma KUZUSHITA
  • Patent number: 10475938
    Abstract: A process for producing conductive pastes for forming solar cell electrodes, including a step of measuring binding energies of oxygen in a glass frit by X-ray photoelectron spectroscopy, a step of selecting a glass frit providing an X-ray photoelectron spectrum representing binding energies of oxygen in which the signal intensity of a peak with a peak top at a range from 529 eV to less than 531 eV has a proportion of 40% or more relative to the total of signal intensities from 526 eV to 536 eV, and a step of mixing together a conductive powder, the glass frit and an organic vehicle.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 12, 2019
    Assignee: NAMICS CORPORATION
    Inventor: Tetsu Takahashi
  • Publication number: 20170040472
    Abstract: A process for producing conductive pastes for forming solar cell electrodes, including a step of measuring binding energies of oxygen in a glass frit by X-ray photoelectron spectroscopy, a step of selecting a glass frit providing an X-ray photoelectron spectrum representing binding energies of oxygen in which the signal intensity of a peak with a peak top at a range from 529 eV to less than 531 eV has a proportion of 40% or more relative to the total of signal intensities from 526 eV to 536 eV, and a step of mixing together a conductive powder, the glass frit and an organic vehicle.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 9, 2017
    Applicant: NAMICS CORPORATION
    Inventor: Tetsu TAKAHASHI
  • Publication number: 20160155868
    Abstract: The present invention aims to provide a high performance crystalline silicon solar cell. The present invention is a crystalline silicon solar cell including a first conductivity-type crystalline silicon substrate; an impurity diffusion layer formed on at least a portion of at least one surface of the crystalline silicon substrate; a buffer layer formed on at least a portion of a surface of the impurity diffusion layer; and an electrode formed on a surface of the buffer layer, wherein the electrode includes a conductive metal and a complex oxide, and the buffer layer is a layer comprising silicon, oxygen, and nitrogen.
    Type: Application
    Filed: July 24, 2014
    Publication date: June 2, 2016
    Applicant: NAMICS CORPORATION
    Inventors: Tetsu TAKAHASHI, Genki SAITO
  • Publication number: 20130312825
    Abstract: The invention relates to a process for manufacturing solar cells. The manufacturing process of the invention comprises the steps of printing a conductive paste onto an n-type silicon layer of a crystalline silicon substrate or onto an antireflection film on the n-type silicon layer, and drying and firing the conductive paste to form an electrode. The conductive paste comprises a conductive powder, a glass frit and an organic vehicle. The glass frit comprises at least one oxide. X-ray photoelectron spectroscopy of the glass fit gives a spectrum representing binding energies of oxygen in which the signal intensity of a peak with a peak top at a range from 529 eV to less than 531 eV has a proportion of 40% or more relative to the total of signal intensities from 526 eV to 536 eV.
    Type: Application
    Filed: May 21, 2013
    Publication date: November 28, 2013
    Inventor: Tetsu TAKAHASHI
  • Publication number: 20130017435
    Abstract: Provided is a lithium ion secondary battery including a laminated body formed by laminating a first electrode layer and a second electrode layer on each other via an electrolytic region, wherein the first electrode layer and the second electrode layer include the same active material, and the active material is Li2MnxMe1?xO3 (Me=Ni, Cu, V, Co, Fe, Ti, Al, Si, or P, and or 0.5£×1).
    Type: Application
    Filed: March 22, 2011
    Publication date: January 17, 2013
    Inventors: Hiroshi Sato, Hiroshi Sasagawa, Rieko Kato, Tetsu Takahashi, Takayuki Fujita
  • Patent number: 7822957
    Abstract: To enable a start in a short period of time in an apparatus including a plurality of chips. In chip carrying out information processing in accordance with a firmware which is at least a part of the firmware common to the other chip, each of the chips receives the firmware, refers to setting information, and transfers the firmware to the other chip based on the setting information.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: October 26, 2010
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Tetsu Takahashi
  • Patent number: 7702218
    Abstract: A coding/decoding part performs codes and decodes a given signal in one of a plurality of coding/decoding modes of different bit rates; and a control part sets a predetermined bit rate to be applied by the coding/decoding part in case a given signal is output after being coded and decoded by said coding/decoding part without storage thereof in a predetermined recording medium.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: April 20, 2010
    Assignee: Fujitsu Microelectronics Limited
    Inventor: Tetsu Takahashi
  • Patent number: 7577197
    Abstract: A video encoder includes a frame synchronizer to temporarily store video data supplied from an exterior in a plurality of memory banks repeatedly selected in a predetermined sequence and to read the video data successively from the plurality of memory banks repeatedly selected in said predetermined sequence, an encode unit to encode the video data read by the frame synchronizer, and a control unit to perform a bank switch process that swaps one memory bank among the plurality of memory banks for another memory bank separate from the plurality of memory banks.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: August 18, 2009
    Assignee: Fujitsu Microelectronics Ltd.
    Inventor: Tetsu Takahashi
  • Patent number: 7533192
    Abstract: The invention provides a task scheduling method which can prevent overflowing of a buffer on a host system or a data encoding/decoding apparatus even when the transfer rate falls in case the compressed data and the non-compressed data are simultaneously transferred between the host system and the data encoding/decoding apparatus. In a task scheduling method, the compressed audio/video data is transferred from the buffer of the host system to an external device with a first transfer priority. The non-compressed audio/video data is transferred from the buffer to the external device with a second transfer priority lower than the first transfer priority.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: May 12, 2009
    Assignee: Fujitsu Microelectronics Ltd.
    Inventors: Tatsushi Otsuka, Tetsu Takahashi
  • Patent number: 7460182
    Abstract: A video signal processing circuit includes a frame memory to receive and store therein at a first rate each frame of a digital video signal in which additional information is assigned separately to each frame, a frame synchronization unit to read each frame of the digital video signal from the frame memory at a second rate, and a processing unit to assign the additional information to the digital video signal read by the frame synchronization unit, without repeating the additional information when the frame synchronization unit reads a same frame of the digital video signal repeatedly, and without skipping the additional information when the frame synchronization unit reads by skipping a frame of the digital video signal.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: December 2, 2008
    Assignee: Fujitsu Limited
    Inventor: Tetsu Takahashi
  • Patent number: 7248739
    Abstract: A semiconductor device capable of deleting data already recorded on a recording medium when information indicative of prohibition of copying is detected from picture signal. Input portion receives an input picture signal, and copy protection information detecting portion detects copy protection information included in the picture signal input from the input portion. Compressing portion compresses the picture signal, and compressed data output portion outputs compressed data obtained by the compressing portion. Specification information output portion generates and outputs specification information specifying a position of the compressed data where the information indicative of prohibition of copying was detected first by the copy protection information detecting portion. A device for recording the compressed data can specify the head of unnecessary compressed information by looking up the specification information, whereby the unnecessary information can be deleted from the recording medium.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: July 24, 2007
    Assignee: Fujitsu Limited
    Inventor: Tetsu Takahashi
  • Patent number: 7242491
    Abstract: Disclosed is a printing agent service method for performing agent printing on a printing agent printer in accordance with a print request of a client terminal, and selects a printing agent printer that is nearest to a client. This method has the steps of receiving a print request and location information from a client terminal (1); retrieving the printing agent printer site (8-1) closest to the location of the client terminal (1) based on the location information; sending the nearest printing agent printer site (8-1) to the client terminal (1) for display; and receiving the printing agent printer site (8-1) specified from the above-mentioned client terminal (1), and sending the print data of the print request to a printer (11) at the specified printing agent printer site. Therefore, a client can easily select a printing agent printer that is close to his current location.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: July 10, 2007
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hirofumi Nakayasu, Tetsu Takahashi
  • Publication number: 20070055858
    Abstract: To enable a start in a short period of time in an apparatus including a plurality of chips. In chip carrying out information processing in accordance with a firmware which is at least a part of the firmware common to the other chip, each of the chips receives the firmware, refers to setting information, and transfers the firmware to the other chip based on the setting information.
    Type: Application
    Filed: February 1, 2006
    Publication date: March 8, 2007
    Inventor: Tetsu Takahashi
  • Publication number: 20060233366
    Abstract: An encryption system for surely protecting digital video data or digital audio data from illegal copying. This system has an encryption device and a decryption device. The encryption device includes: an A/D converter; a code setting unit for separately generating a frame check code on first data of each of a plurality of frame data created by collecting unit data by a predetermined number; an encrypting unit for creating chain encrypted data by sequentially performing an encryption processing, on the basis of the frame check code, using encryption results of previous unit data for encryption of next unit data; and an interface. The decryption device includes an interface, a transfer starting unit and a decrypting unit.
    Type: Application
    Filed: August 18, 2005
    Publication date: October 19, 2006
    Inventor: Tetsu Takahashi
  • Patent number: RE39487
    Abstract: A crankshaft assembly for an internal combustion engine includes a crankshaft, an elastic member fixed to the crankshaft, and a flywheel fixed to the elastic member such that the flywheel is supported in an elastic relationship with the crankshaft. The elastic member has a rigidity in its rotating direction large enough to effectively transmit a driving power to a transmission through a clutch. On the other hand, the elastic member has a rigidity in an axial direction of the crankshaft small enough to shift a resonance frequency of a bending vibration out of a target frequency band of a forced vibration, while ensuring to prevent a failure of disengagement of the clutch.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: February 13, 2007
    Assignee: Valeo Unisia Transmission Corporation
    Inventors: Satoshi Kono, Shizuaki Hidaka, Tetsu Takahashi