Patents by Inventor Toshihiko Umehara

Toshihiko Umehara 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 observing sea ice
    Patent number: 7095359
    Abstract: An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne SAR are synchronously performed, a correlation between a draft profile of sea ice passing over the sonar and an SAR backscattering coefficient profile is calculated, and an ice draft of desired sea ice is calculated from the relational expression and an SAR backscattering coefficient. As the SAR backscattering coefficient, a backscattering coefficient of L-band HV polarization may be used. A backscattering coefficient of X-band VV polarization is preferably used as the SAR backscattering coefficient to detect thin ice having a thickness of not more than approximately 10 cm.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: August 22, 2006
    Assignees: National Institute of Informantion and Communications Technology, Incorporated Administrative Agency, Japan Aerospace Exploration Agency, Agency of Industrial Science and Technology
    Inventors: Takeshi Matsuoka, Seiho Uratsuka, Makoto Satake, Tatsuharu Kobayashi, Akitsugu Nadai, Toshihiko Umehara, Hideo Maeno, Hiroyuki Wakabayashi, Yasushi Fukamachi, Fumihiko Nishio
  • Marking method and marked molding
    Publication number: 20050145131
    Abstract: A method for readily applying a marking to an object made of PTFE, for example, a seal ring provided with a cut portion on a part of a circumference, or an intermediate product for the seal ring, comprising the steps of preparing an object to be marked that is made of PTFE, irradiating a laser beam onto the object to be marked to alter the state of only an irradiated surface of the PTFE, and forming a marking with a white-based color on the irradiated surface of the PTFE so that the irradiated surface exhibits a color tone different from that of a non-irradiated surface of the PTFE.
    Type: Application
    Filed: October 1, 2003
    Publication date: July 7, 2005
    Inventors: Masaaki Takido, Tadashi Abiko, Toshihiko Umehara
  • Method of observing sea ice
    Publication number: 20040143395
    Abstract: An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne SAR are synchronously performed, a correlation between a draft profile of sea ice passing over the sonar and an SAR backscattering coefficient profile is calculated, and an ice draft of desired sea ice is calculated from the relational expression and an SAR backscattering coefficient. As the SAR backscattering coefficient, a backscattering coefficient of L-band HV polarization may be used. A backscattering coefficient of X-band VV polarization is preferably used as the SAR backscattering coefficient to detect thin ice having a thickness of not more than approximately 10 cm.
    Type: Application
    Filed: October 31, 2003
    Publication date: July 22, 2004
    Inventors: Takeshi Matsuoka, Seiho Uratsuka, Makoto Satake, Tatsuharu Kobayashi, Akitsugu Nadai, Toshihiko Umehara, Hideo Maeno, Hiroyuki Wakabayashi, Yasushi Fukamachi, Fumihiko Nishio