Patents by Inventor Takeshi Ishizaka

Takeshi Ishizaka 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: 6125867
    Abstract: A self-supporting umbrella has a handle at a base end portion of a front shank and a ferrule at a front end portion of said shank. The ferrule includes a plurality of legs which are capable of being opened and closed. A projection which extends inward is formed inside a base end of each of the leg portions so as to pivotally mount the base end of each of the legs on a ferrule base portion. A resilient member is fitted into a front end portion of the shank such that a leg operating member having a restricted section in an axially intermediate portion thereof can be disposed on a front end of the resilient member. The restricted section is adapted to pinch therein the projection. The leg operating member is urged by a resilient force of the resilient member toward the front end of the umbrella.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: October 3, 2000
    Assignee: Takeshi Ishizaka
    Inventor: Takeshi Ishizaka