Patents by Inventor Daniel J. Grondal

Daniel J. Grondal 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 and method of indirectly illuminating a sign
    Patent number: 6026602
    Abstract: An internally illuminated sign having indirect illumination provided by light emitting diodes (LED). A plurality of LED's are mounted on a printed circuit board (PC board) and mounted within the sign. The PC board is offset to a side of the sign housing with the somewhat directional LED light source directed toward a reflector. The reflector is angled to convert the generally narrow directional light source of an LED into a substantially even, diffused and non-uniform light distribution pattern.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: February 22, 2000
    Assignee: Prolume, Inc.
    Inventors: Daniel J. Grondal, Robert M. Johnstone
  • Indirectly illuminated sign
    Patent number: 5542201
    Abstract: An internally illuminated sign having indirect illumination provided by light emitting diodes (LED). A plurality of LED's are mounted on a printed circuit board (PC board) and mounted within the sign. The PC board is offset to a side of the sign housing with the somewhat directional LED light source directed toward a reflector. The reflector is angled to convert the generally narrow directional light source of an LED into a substantially even, diffused and non-uniform light distribution pattern.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 6, 1996
    Assignee: Prolume, Inc.
    Inventors: Daniel J. Grondal, Robert M. Johnstone
  • Indirectly illuminated sign
    Patent number: 5428912
    Abstract: An internally illuminated sign having indirect illumination provided by light emitting diodes (LED). A plurality of LED's are mounted on a printed circuit board (PC board) and mounted within the sign. The PC board is offset to a side of the sign housing with the somewhat directional LED light source directed toward a reflector. The reflector is angled to convert the generally narrow directional light source of an LED into a substantially even, diffused and non-uniform light distribution pattern.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: July 4, 1995
    Assignee: Prolume Incorporated
    Inventors: Daniel J. Grondal, Robert M. Johnstone