Patents by Inventor Frederick H. Hyde

Frederick H. Hyde 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).

  • Chain saw sharpening apparatus
    Patent number: 4277987
    Abstract: A chain saw sharpening apparatus is disclosed including a support member adapted in operation to locate about a chain saw in a predetermined relationship thereto and supporting two guide roller assemblies each including a pair of guide rollers disposed at opposite sides of said support whereby a file operatively supported on one said pair of guide rollers is disposed at an angle equal to the cutting edge angle of one set of teeth, while the other said pair of guide rollers operatively supports a file at angle equal to the cutting edge angle of the other set of teeth.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: July 14, 1981
    Inventor: Frederick H. Hyde