Patents by Inventor Keishu Yanagihara

Keishu Yanagihara 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).

  • Air flow adjusting rear member of the helmet
    Patent number: 5996128
    Abstract: An air flow adjusting rear member of a helmet comprises a top portion for suppressing negative pressure generated at a back part of the helmet and is removable from the helmet by using adhesive element for fastening the air flow adjusting rear member to the back part of the helmet. The air flow adjusting rear member is made of thin resin for enough plasticity and elasticity to modify its shape in accordance with a curved surface of the helmet.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: December 7, 1999
    Assignee: Korea OGK Co., Ltd.
    Inventor: Keishu Yanagihara