Patents by Inventor Mutsumi Moriwaki

Mutsumi Moriwaki 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).

  • Pressure gradient control system
    Patent number: 5356335
    Abstract: A pressure gradient control system includes a ventilated area divided into a plurality of intercommunicating zones, a zone-to-zone pressure gradient detecting device for detecting pressure gradients between adjacent zones, a control unit for adjusting quantities of air supply or exhaust to/from the zones based on detection information received from the zone-to-zone pressure gradient detecting device to establish a predetermined pressure gradient between adjacent zones, and an interior-ambient pressure gradient detecting device for detecting pressure gradients between an ambient area and those of the zones communicating with the ambient area.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: October 18, 1994
    Assignee: Taikisha, Ltd.
    Inventors: Yoshiaki Matsui, Mutsumi Moriwaki