Patents by Inventor Tomomi Narita

Tomomi Narita 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: 6768946
    Abstract: The present invention provides a method and apparatus for locating the position of a lightning strike free of topography-dependent error by calculating a ground point having a difference in propagation distance at receiving stations (R1, R2 and R3) in at least three different locations. The difference in horizontal distance that would result in arrival time differences at the receiving stations is calculated using the horizontal coordinates of the respective stations. The ground point is taken as the tentative lightning strike position (X). The tentative lightning strike position is then corrected to a lightning strike position obtained by evaluating the arrival time difference in terms of the creepage distances (Ls) following depressions and elevations in the ground surface. The depressions and elevations in the ground surface are smoothed to a spatial wavelength that is comparable to the wavelength of the lightning electromagnetic waves.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: July 27, 2004
    Assignee: The Tokyo Electric Power Company
    Inventors: Shigemitsu Okabe, Tomomi Narita, Sakae Taniguchi
  • Publication number: 20030187580
    Abstract: It is an object of the present invention to provide a lightning strike position locating method, apparatus, system and program that are free of topography-dependent error.
    Type: Application
    Filed: September 25, 2002
    Publication date: October 2, 2003
    Applicant: The Tokyo Electric Power Company, Inc.
    Inventors: Shigemitsu Okabe, Tomomi Narita, Sakae Taniguchi
  • Patent number: 5917099
    Abstract: Methyl chloride is prepared by effecting liquid-phase reaction between hydrogen chloride and methanol in the absence of a catalyst. The reaction is effected in divided stages including at least an early stage and a last stage. The early stage of reaction is effected in a stoichiometric excess of hydrogen chloride. The last stage of reaction is effected in a stoichiometric excess of methanol. The invention is industrially advantageous in that methyl chloride can be prepared at a high conversion of hydrogen chloride while suppressing the formation of dimethyl ether by-product.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: June 29, 1999
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tomomi Narita, Hiroyuki Kobayashi, Yukinori Satoh, Yoshihiro Shirota