Patents by Inventor Masaaki Tomosada

Masaaki Tomosada 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).

  • Hand saw with an interchangeable saw blade
    Patent number: 4248284
    Abstract: A hand saw with an interchangeable saw blade comprising a saw blade with a tongue a U-shaped reinforcing member for reinforcing the saw blade and the tongue, and a molded handle including a blade receiving opening. The handle includes a set screw which protrudes into notches formed in the tongue of the blade and the reinforcing member to lock the blade to the handle. The notches in the tongue and the reinforcing member are arranged so that only the notch in the tongue of the blade engages the tip of the set screw, thereby ensuring a firm clamping of the saw blade to the handle. The opening for receiving the tongue of the blade is defined by ribs formed on the handle.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: February 3, 1981
    Assignee: Razor Saw Manufacturing Co., Ltd.
    Inventor: Masaaki Tomosada