Patents by Inventor Akihiko Takasu

Akihiko Takasu 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).

  • Method of inspecting a body having fine-gap grooves and method of repairing the body
    Patent number: 7679738
    Abstract: A molding die has through holes composed of feed holes and slit grooves for producing honeycomb structure bodies. The slit groove is formed in at least a part of each through hole. In a method of inspecting the molding die, a light is irradiated into the feed holes side to pass through the through holes. A camera is disposed at the slit groove formation side of the molding die to photograph the amount of light output from the slit groove side. A difference in intensity of the amount of light output from the slit grooves is calculated in order to detect at least the presence of a defective slit groove having an abnormal part. In another method of repairing the defective slit groove, a modifier made of abrasive grains and clay mother material is forcedly provided into the defective slit groove in order to repair or remove the abnormal part.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: March 16, 2010
    Assignee: Denso Corporation
    Inventors: Shoichi Nagatoshi, Susumu Takahashi, Akihiko Takasu
  • METHOD OF INSPECTING A BODY HAVING FINE-GAP GROOVES AND METHOD OF REPAIRING THE BODY
    Publication number: 20080225302
    Abstract: A molding die has through holes composed of feed holes and slit grooves for producing honeycomb structure bodies. The slit groove is formed in at least a part of each through hole. In a method of inspecting the molding die, a light is irradiated into the feed holes side to pass through the through holes. A camera is disposed at the slit groove formation side of the molding die to photograph the amount of light output from the slit groove side. A difference in intensity of the amount of light output from the slit grooves is calculated in order to detect at least the presence of a defective slit groove having an abnormal part. In another method of repairing the defective slit groove, a modifier made of abrasive grains and clay mother material is forcedly provided into the defective slit groove in order to repair or remove the abnormal part.
    Type: Application
    Filed: December 4, 2007
    Publication date: September 18, 2008
    Applicant: DENSO CORPORATION
    Inventors: Shoichi Nagatoshi, Susumu Takahashi, Akihiko Takasu
  • Optical information recording medium and method of manufacturing
    Patent number: 6014364
    Abstract: An optical information recording medium which can be played back by both a playback system for an SD (Super-density Disk) and a playback system for an HDMCD (High Density Multimedia Compact Disk), or by both the playback system for the SD and a playback system for a CD (Compact Disk).
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: January 11, 2000
    Assignee: Nippon Columbia Co., Ltd.
    Inventors: Akihiko Takasu, Kazuho Kato
  • Optical information recording medium
    Patent number: 5966367
    Abstract: An optical information recording medium which can be played back by both a playback system for an SD (Super-density Disk) and a playback system for an HDMCD (High Density Multimedia Compact Disk), or by both the playback system for the SD and a playback system for a CD (Compact Disk).
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: October 12, 1999
    Assignee: Nippon Columbia Co., Ltd.
    Inventors: Akihiko Takasu, Kazuho Kato
  • Optical information recording medium and method of manufacturing
    Patent number: 5828648
    Abstract: An optical information recording medium which can be played back by both a playback system for an SD (Superdensity Disk) and a playback system for an HDMCD (High Density Multimedia Compact Disk), or by both the playback system for the SD and a playback system for a CD (Compact Disk).
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: October 27, 1998
    Assignee: Nippon Columbia Co., Ltd.
    Inventors: Akihiko Takasu, Kazuho Kato