Patents by Inventor Takemi Ryunoshin

Takemi Ryunoshin 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).

  • Collapsible helmet
    Patent number: 4091470
    Abstract: A collapsible helmet is composed of several inwardly curved fan-shape sections which are divided into an equal number of parts at the top of the helmet body. The helmet can be folded into a nested position so as to assume the size of one of the sections so as to be convenient for carrying or storage. In the expanded position the helmet is able to absorb an impact imparted to the helmet, effectively.
    Type: Grant
    Filed: February 2, 1977
    Date of Patent: May 30, 1978
    Inventor: Takemi Ryunoshin