Patents by Inventor David C. Gustavus

David C. Gustavus 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).

  • Portable adjustable roof platform
    Patent number: 4450935
    Abstract: A portable adjustable roof platform for use with a roof ladder so as not to damage a sloped roof surface. The roof platform may be quickly engaged with the roof ladder and adjusted to the horizontal position without handling small locating or fastening parts. The roof platform folds into a compact closed configuration for ease of transportation.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: May 29, 1984
    Inventor: David C. Gustavus