Patents by Inventor Myrtle M. Roberts

Myrtle M. Roberts 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).

  • Patent number: 4755074
    Abstract: The disclosure is directed to a pencil sharpener device in which the sharpening element is slidably mounted within a support member for movement between a retracted position when not in use to a protracted position for use in sharpening the pencil. When in use, the sharpening element is movable to its protracted position to permit pencil shavings to fall free out of the support member during the sharpening operation. The disclosure further provides an eraser element or a combined eraser/marker assembly to be removably associated with the device.
    Type: Grant
    Filed: September 17, 1986
    Date of Patent: July 5, 1988
    Inventor: Myrtle M. Roberts