Patents by Inventor Tetsuto Minowa

Tetsuto Minowa 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).

  • Golf putter shaft
    Patent number: 7025691
    Abstract: In a putter shaft having a tip end and a butt end, a curvature of the putter shaft is represented by a curvature curve of the putter shaft which increases monotonously from the tip end to the butt end. The curvature curve is defined as a curve showing variation of the curvature in a longitudinal axis direction of the putter shaft in a state where a load acts on the tip end to deform the putter shaft with the putter shaft being fixed at the butt end.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: April 11, 2006
    Assignee: Fujikura Rubber Ltd.
    Inventors: Norio Matsumoto, Tetsuto Minowa
  • Golf putter shaft
    Publication number: 20050020375
    Abstract: In a putter shaft having a tip end and a butt end, a curvature of the putter shaft is represented by a curvature curve of the putter shaft which increases monotonously from the tip end to the butt end. The curvature curve is defined as a curve showing variation of the curvature in a longitudinal axis direction of the putter shaft in a state where a load acts on the tip end to deform the putter shaft with the putter shaft being fixed at the butt end.
    Type: Application
    Filed: July 23, 2004
    Publication date: January 27, 2005
    Applicant: Fujikura Rubber Ltd.
    Inventors: Norio Matsumoto, Tetsuto Minowa
  • Golf putter shaft
    Publication number: 20030125124
    Abstract: In a putter shaft having a tip end and a butt end, a curvature of the putter shaft is represented by a curvature curve of the putter shaft which increases monotonously from the tip end to the butt end. The curvature curve is defined as a curve showing variation of the curvature in a longitudinal axis direction of the putter shaft in a state where a load acts on the tip end to deform the putter shaft with the putter shaft being fixed at the butt end.
    Type: Application
    Filed: December 24, 2002
    Publication date: July 3, 2003
    Applicant: Fujikura Rubber Ltd.
    Inventors: Norio Matsumoto, Tetsuto Minowa
  • Golf club shaft and method of producing the same
    Patent number: 5653646
    Abstract: A golf club shaft is composed of a fiber layer formed by employing a filament winding process using filaments each impregnated with a thermosetting resin, and a reinforcement layer formed by partially inserting a braid impregnated with a thermosetting resin onto a predetermined position on the fiber layer. A method of producing a golf club shaft of the foregoing type comprises a step of winding filaments each impregnated with a thermosetting resin around a mandrel to form a fiber layer, a step of inserting a braid composed of filaments each impregnated with a thermosetting resin onto a predetermined position on the fiber layer, a step of allowing the thermosetting resin to be thermally cured, and a step of disconnecting the mandrel.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: August 5, 1997
    Assignee: Fujikura Rubber Ltd.
    Inventors: Isamu Negishi, Tetsuto Minowa