Patents by Inventor Lawrence R. Joba

Lawrence R. Joba 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).

  • Line density control for plotters
    Patent number: 5247609
    Abstract: The conventional computer program in the microcontroller of an ink jet printer-plotter is modified so as to plot a line of constant average dot density along its length, regardless of the orientation of various segments making up the plotted line. This modification provides the benefit of consistent line density for all plotted lines.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: September 21, 1993
    Assignee: Thermo Separation Products (California) Inc.
    Inventor: Lawrence R. Joba
  • Method and apparatus for time distributed use of ink-jets in a printer-plotter
    Patent number: 4989016
    Abstract: A computer program for controlling an ink-jet printer-plotter having a conventional multi-jet ink-jet cartridge operates so that when the printer-plotter is in plot mode, the jets are used in sequence, instead of conventionally always using the same jet. A different jet is used each time a new graph is started. This method lengthens the life of the cartridge by reducing stress on any one of the jets.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: January 29, 1991
    Assignee: Spectra-Physics, Inc.
    Inventors: Ronald A. Gatten, Lawrence R. Joba
  • Ink saving method for plotters
    Patent number: 4980843
    Abstract: In a time chart plotter which uses a liquid ink supply (such as an ink jet plotter) the computer program in the plotter microcontroller is modified so that for any one increment of chart movement, each point in the other dimension (i.e., the signal axis) is plotted only once. This conserves ink and also prevents heavy buildup of ink on the chart.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: December 25, 1990
    Assignee: Spectra-Physics
    Inventor: Lawrence R. Joba
  • Automated kinetic perimetry apparatus and method
    Patent number: 4260227
    Abstract: A Goldmann-type perimeter is provided which automatically performs kinetic perimetry without the need for manual intervention.
    Type: Grant
    Filed: October 4, 1977
    Date of Patent: April 7, 1981
    Assignee: Coherent, Inc.
    Inventors: Charles R. Munnerlyn, Lawrence R. Joba, Ramakrishna Shanker