Patents Assigned to Yamaguchi Yakuhin Shokai Ltd.
  • Rhinological diagnostic device
    Patent number: 4945919
    Abstract: A rhinological diagnostic device in the form of a multi-layer sheet comprising, from top to bottom, a transparent plastic layer, a thermochromic liquid crystal layer, a black coating layer and a support layer. In use, this multi-layer sheet is positioned beneath the nose to cause expired air from the nostrils to impinge on the transparent plastic layer for diagnosing an abnormality in the nasal cavity based on the resulting topographic color pattern in said thermochromic liquid crystal layer.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: August 7, 1990
    Assignees: Yamaguchi Yakuhin Shokai Ltd., Japan Capsular Products, Inc.
    Inventor: Akira Hattori