Patents by Inventor Robert Earl Keller

Robert Earl Keller 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).

  • Permanent ink marker for re-identifying wire
    Patent number: 6582142
    Abstract: A permanent ink marker for re-identifying insulated wire. The marker has a container for ink, and a nib that is disposed on the container and in communication with the interior thereof. The nib is provided with a slit that extends from an end of the nib that is remote from the container in a direction toward the container. The end of the slit remote from the end of the nib is preferably widened, and can have a circular cross-section. The end of the nib preferably has a notch where the slit starts.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: June 24, 2003
    Inventors: Robert Earl Keller, Paul David Vicars
  • Permanent ink marker for re-identifying wire
    Publication number: 20020100138
    Abstract: A permanent ink marker is provided for re-identifying insulated wire. The marker has a container for ink, and a nib that is disposed on the container and in communication with the interior thereof. The nib is provided with a slit that extends from an end of the nib that is remote from the container in a direction toward the container. The end of the slit remote from the end of the nib is preferably widened, and can have a circular cross-section. The end of the nib preferably has a notch where the slit starts.
    Type: Application
    Filed: January 28, 2002
    Publication date: August 1, 2002
    Inventors: Robert Earl Keller, Paul David Vicars