Patents by Inventor Calvin K. Yasumiishi

Calvin K. Yasumiishi 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).

  • Visual tip
    Patent number: 4709500
    Abstract: A tubular staff flagged at an end, composed of a fluorescent polyvinyl plastic, placed on the distal end of a fishing rod tip for the purpose of signaling a fish strike and aiding in the identification of the fishing rod tip from the surrounding background especially under dusky light conditions.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: December 1, 1987
    Inventor: Calvin K. Yasumiishi