Patents by Inventor Takeo Kuboyama

Takeo Kuboyama 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).

  • Luminous float
    Patent number: 5176552
    Abstract: A luminous float includes a float body, a resistance plate and a light-emitting device, and causes the light-emitting device to emit light by electricity generated by a dynamo through the relative motions of the float body and the resistance plate, which are caused by waves and tidal currents. In a preferred embodiment, a contractible and extensible bellows provided at the bottom of the float body is connected with the resistance plate through a connecting element. Furthermore, one end of a spring is coupled to an inner member of the float body, and the other end of the spring is coupled to the bottom of the bellows through a coupling means.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: January 5, 1993
    Assignees: Ohumi Tsusho Kabushiki Kaisha, Iron Works Co., Ltd.
    Inventors: Takeo Kuboyama, Kenichi Shigetomi, Hideki Noda, Yasu Osaka, Yuji Osaka