Patents by Inventor John G. Swartzfager

John G. Swartzfager 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).

  • Glass cutting method
    Patent number: 4046299
    Abstract: A glass cutting tool having arms offset from the head portion of the tool and engageable with the sides of a tubular workpiece. A cutting element on the tool head is constrained for linear passage along the workpiece by at least one of the arms. Provision is made for extension or retraction of the arms relative to the tool head while additional provision is made for varying the effective distance between an arm and the cutting element. A method is also disclosed for the cutting of glass tubes.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: September 6, 1977
    Inventor: John G. Swartzfager