Patents by Inventor Tetsushi Ishigami

Tetsushi Ishigami 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).

  • Device for changing a fluid passage
    Patent number: 5464370
    Abstract: A device for changing air flow from a room has a casing with three openings arranged in a T-shaped disposition. The first and second openings are arranged in a L-shape with respect to a chamber in the casing, and the third opening connects the chamber to an exhaust passage. A flap is provided, with a side end rotatably supported at a corner between the first opening and the second opening such that the flap can be moved between positions for selectively closing the first or second opening by operation of a mechanism for rotating the flap.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: November 7, 1995
    Assignees: Yugen Kaisha New Media Systems, Daito Teck Kabushiki Kaisha, Yoshitake Kusamichi
    Inventors: Keishi Shimizu, Kanzi Shimizu, Masanobu Mitsumachi, Masato Nakajima, Tetsushi Ishigami, Yoshitake Kusamichi