Patents by Inventor Akio Shiina

Akio Shiina 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).

  • Toy utilizing bubbles in liquid
    Patent number: 5017171
    Abstract: A toy utilizing bubbles in liquid comprises a vessel to be charged with a liquid keeping an air layer at the top and to be sealed, a bubble generating member, and in-liquid movable members moved by bubbles rising in the liquid in the vessel.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: May 21, 1991
    Assignee: Sente Creations Co., Ltd.
    Inventor: Akio Shiina
  • Toy utilizing bubbles in liquid
    Patent number: 4990118
    Abstract: A toy utilizing bubbles in liquid comprises a vessel to be charged with a liquid keeping an air layer at the top and to be sealed, a bubble generating member, and in-liquid movable members moved by bubbles rising in the liquid in the vessel.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: February 5, 1991
    Assignee: Sente Creations Co., Ltd.
    Inventor: Akio Shiina