Patents by Inventor Earl O. Roof

Earl O. Roof 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).

  • Convertible lawn care apparatus
    Patent number: 4076460
    Abstract: Portable lawn care apparatus is disclosed which includes attachment assemblies for converting to a mobile vacuum, a shredder/chipper, a blower or a stationary vacuum with a hand-operated flexible hose.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: February 28, 1978
    Inventor: Earl O. Roof