Patents by Inventor Tamotsu Saitoh

Tamotsu Saitoh 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: 4849766
    Abstract: The invention relates to a receiving antenna disposed on or in a vehicle window glass such as the rear window glass or the windshield of an automobile. The antenna comprises, as a principal antenna element, a transparent and conductive film in the shape of a quadrilateral having two substantially parallel sides one of which is at a distance of 15-25 mm from the upper edge of the window glass and the other at a distance of 15-25 mm from the lower edge. The quadrilateral film may be so wide that the remaining two sides thereof extend along the two side edges of the window glass, respectively, at a distance of 15-25 mm from the respective side edges. This is suitable for reception of not only FM radio broadcast waves in the 76-90 MHz or 88-108 MHz band and TV broadcast waves in the 90-222 MHz band but also AM radio broadcast waves.
    Type: Grant
    Filed: July 2, 1987
    Date of Patent: July 18, 1989
    Assignee: Central Glass Company, Limited
    Inventors: Hiroshi Inaba, Masao Shinnai, Kazuya Nishikawa, Tamotsu Saitoh, Tokio Tsukada
  • Patent number: 4803492
    Abstract: The invention provides an antenna disclosed on or in a vehicle window glass, e.g. an automobile rear window glass, for receiving FM broadcast waves. The antenna has a main element, which extends horizontally from a side marginal region of the glass pane to a middle region but does not intersect the longitudinal center axis of the glass pane, and a phase adjusting element which extends parallel to the main element from the same side marginal region and is connected at its end in the side marginal region to the main element by a perpendicular line. The feed point is connected to an arbitrary point on the perpendicular line. The main element may be folded so as to have at least one horizontally extending turn-back part. The phase adjusting element may extend to the opposite side marginal area of the glass pane and may be folded so as to have a turn-back part which extends horizontally without intersecting the center axis of the glass pane.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: February 7, 1989
    Assignee: Central Glass Company, Limited
    Inventors: Hiroshi Inaba, Masao Shinnai, Kazuya Nishikawa, Tamotsu Saitoh, Tokio Tsukada
  • Patent number: 4768037
    Abstract: The invention relates to an antenna disposed on or in a vehicle window glass such as the rear window glass or the windshield of an automobile to receive FM radio and/or TV broadcast waves. A principal element of the antenna is a transparent and conductive film in the shape of a quadrilateral having a horizontal upper side. The conductive film occupies a major and central area of the window glass at a distance not less than 15 mm from each edge of the glass. A feeding bar formed of a strip of a low-resistivity material is attached to the conductive film so as to extend horizontally along at least a portion of the upper side of the conductive film, and a lead connects the feeding bar to a feeding point on the window glass. A good position of the junction point of the lead and the feeding bar is in the middle of the width of the window glass.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: August 30, 1988
    Assignee: Central Glass Company, Limited
    Inventors: Hiroshi Inaba, Masao Shinnai, Kazuya Nishikawa, Tamotsu Saitoh, Tokio Tuskada