Patents by Inventor Carl J. Landsness

Carl J. Landsness 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).

  • Printer having identifiable interchangeable heads
    Patent number: 4872027
    Abstract: A dot-matrix printer is provided with different types of printheads which are interchangeably attachable to the printer carriage. The heads are provided with individual codes which are read by the printer control system and used to reconfigure its control function to suit the control requirements of the identified head. Such a system may include a microprocessor responsive to individual sets of instructions or programs providing new and different processing capabilities for printing control in response to the insertion of a new printhead.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: October 3, 1989
    Assignee: Hewlett-Packard Company
    Inventors: William A. Buskirk, Carl J. Landsness, John D. Rhodes