Patents by Inventor Richard A. Hahs

Richard A. Hahs 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).

  • Sensor system for printers
    Patent number: 5710579
    Abstract: An improved sensor system for a printer having a print carriage comprising an ink source, a print head, and a coupler for coupling the ink source to the print head, the coupler including a tube for carrying the ink and sensors for detecting voids in the ink carried by the tubes and positioned in close proximity to the ink source and the print head. A controller is coupled to the sensors and responsive to signals therefrom to stop the print carriage when voids are simultaneously detected by the sensors.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: January 20, 1998
    Assignee: CalComp Inc.
    Inventors: Richard A. Hahs, August D. Coby