Patents by Inventor Irvin E. Sword

Irvin E. Sword 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).

  • Chipper saw
    Patent number: 4039011
    Abstract: A circular saw adapted to produce chip-size material when cutting wood. The saw comprises a saw blade with teeth distributed about the circumference of the blade. The teeth are separated from each other in such a manner that in cutting a kerf, wood material is chiseled away in relatively large chip size, and such material is permitted to fall away from the kerf with minimal tendency of crushing or fracturing which would reduce the chip size.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: August 2, 1977
    Assignee: Northwest Hardwoods, Inc.
    Inventor: Irvin E. Sword