Patents by Inventor Seiko Yokoyama

Seiko Yokoyama 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: 4952775
    Abstract: A floor heating panel made of wood, a heating element on the top of the wood, a covering layer placed over the heating element to cover the entire top surface of the wood, and a cushioning layer beneath the wood. The wood has on its bottom surface a row of slits to allow the wood to resiliently flex to a limited extent. The floor heating panel has two connectors that are slidably along one dimension of the heating panel between inner and outer stop elements.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: August 28, 1990
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Seiko Yokoyama, Hikomi Tanooka, Minoru Hibino, Junichi Arakawa