Patents by Inventor Douglas S. Hammond

Douglas S. Hammond 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).

  • Internally illuminated sign
    Patent number: 5588742
    Abstract: An internally illuminated sign in which a luminaire mounted on the border or periphery of the sign uniformly illuminates the face and/or faces of the sign thereby eliminating any necessity for providing human access to the interior of the sign for maintenance and relamping.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: December 31, 1996
    Assignee: Holophone Corporation
    Inventors: Gregory J. Subisak, Douglas S. Hammond
  • Internally illuminated sign
    Patent number: 5355291
    Abstract: An internally illuminated sign in which a luminaire mounted on the border or periphery of the sign uniformly illuminates the face and/or faces of the sign thereby eliminating any necessity for providing human access to the interior of the sign for maintenance and relamping.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: October 11, 1994
    Assignee: Holophane Lighting, Inc.
    Inventors: Gregory J. Subisak, Douglas S. Hammond
  • Internally illuminated sign
    Patent number: 5188453
    Abstract: An internally illuminated sign in which a luminaire mounted on the border or periphery of the sign uniformly illuminates the face and/or face of the sign thereby eliminating any necessity for providing human access to the interior of the sign for maintenance and reclamping.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: February 23, 1993
    Assignee: Holophane Company, Inc.
    Inventors: Gregory J. Subisak, Douglas S. Hammond
  • Lighting system for illuminating billboards and the like
    Patent number: 4954935
    Abstract: A new and improved lighting system for illuminating signs such as billboards and the like which increases the amount of light illuminating the light from a light source by 15 to 20% as compared with previous systems and decreases the variance of illumination intensity by 50%.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: September 4, 1990
    Assignee: Holophane Company, Inc.
    Inventors: Douglas S. Hammond, Herbert A. Odle
  • Reflector for illuminating signs
    Patent number: 4575783
    Abstract: In a luminaire for illuminating signs, a reflector having segments for redirecting light to various areas of the sign so as to create a uniformly illuminated sign.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: March 11, 1986
    Assignee: Manville Service Corporation
    Inventor: Douglas S. Hammond
  • Suspended luminaire
    Patent number: D553787
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: October 23, 2007
    Inventor: Douglas S. Hammond
  • Luminaire
    Patent number: D300670
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: April 11, 1989
    Assignee: Manville Corporation
    Inventors: Robert L. Ewing, Douglas S. Hammond, Mark L. Roush
  • Luminaire
    Patent number: D300671
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: April 11, 1989
    Assignee: Manville Corporation
    Inventors: Robert L. Ewing, Douglas S. Hammond, James L. Leary, David G. Meredith, Mark L. Roush
  • Luminaire
    Patent number: D307188
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: April 10, 1990
    Assignee: Holophane Company, Inc.
    Inventors: James E. Denney, Robert L. Ewing, Douglas S. Hammond
  • Outdoor roadway lighting fixture
    Patent number: D347080
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: May 17, 1994
    Assignee: Cooper Industries, Inc.
    Inventors: David E. Mehaffey, Douglas S. Hammond
  • Outdoor roadway lighting fixture
    Patent number: D348531
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: July 5, 1994
    Assignee: Cooper Industries, Inc.
    Inventors: David E. Mehaffey, Douglas S. Hammond
  • Outdoor roadway lighting fixture
    Patent number: D348945
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: July 19, 1994
    Assignee: Cooper Industries, Inc.
    Inventors: David E. Mehaffey, Douglas S. Hammond
  • Light globe for a street lamp
    Patent number: D422111
    Type: Grant
    Filed: October 15, 1998
    Date of Patent: March 28, 2000
    Assignee: Jeanette Shade and Novelty, Inc.
    Inventors: Theodore Sarniak, III, Douglas S. Hammond
  • Street lamp
    Patent number: D423707
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: April 25, 2000
    Assignee: CC Custom Products, Inc.
    Inventor: Douglas S. Hammond