Patents by Inventor John Patrick Dugan

John Patrick Dugan 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).

  • Position leveling sensor for a laser transmitter
    Patent number: 5994688
    Abstract: A device for leveling a laser transmitter is provided. An optical position sensor is used to measure the position of a compensator assembly. The compensator assembly automatically adjusts the position of the laser beam once the compensator assembly is within a specified range of level. Once the compensator assembly is within the specified range, the compensator assembly optically adjusts the laser beam so that it is plumb. A leveling device may be used to level the laser transmitter in response to the position of the compensator assembly as measured by the position sensor.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: November 30, 1999
    Assignee: Spectra Precision, Inc.
    Inventors: Jonathan Appleget Jackson, Ayman Zuhdi Hajmousa, Robert Matthew Perchak, John Patrick Dugan