Patents by Inventor Lonnie J. Helgeson

Lonnie J. Helgeson 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).

  • Apparatus for analyzing communication networks
    Patent number: 5121342
    Abstract: A handheld, battery operated network testing device uses disk loaded software, programmable gate arrays, and digital signal processing to selectively configure the device for a full range of analog and digital testing modes in a variety of communications protocols, including T-1 full duplex drop and insert. A 25 by 80 column LCD display provides for a full scale video output, and a unique, power efficient, electroluminescent backlight circuit provides for viewing of the display in poorly lit environments.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: June 9, 1992
    Assignee: Network Communications Corporation
    Inventors: Robert C. Szymborski, Kenneth D. Gjerde, Jr., Jeffrey D. Mullin, Shawn P. Finnegan, Tracy Clark, Lonnie J. Helgeson
  • Human body respiratory vest
    Patent number: D461897
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: August 20, 2002
    Assignee: Electromed, Inc.
    Inventors: Craig N. Hansen, Lonnie J. Helgeson
  • Human respiratory bladder
    Patent number: D469876
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: February 4, 2003
    Assignee: Electromed, Inc.
    Inventors: Craig N. Hansen, Lonnie J. Helgeson
  • Supine respiratory vest
    Patent number: D478989
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: August 26, 2003
    Assignee: Electromed, Inc.
    Inventors: Craig N. Hansen, Lonnie J. Helgeson