Patents by Inventor David H. Porter

David H. Porter 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).

  • Patent number: 4861273
    Abstract: A low voltage track lighting system includes a flexible power track and one or more light fixtures removably attachable to the track for energization. The track has an elongated support member of an electrical insulating material, the support member being generally I-shaped, defining lateral electrical conductor-receiving channels, the conductors being flat strips extending on-end along the sides of the support member and exposed therealong, the conductor orientation enabling the power track to be bent in a horizontal plane, but not in a vertical plane.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: August 29, 1989
    Assignee: Thomas Industries, Inc.
    Inventors: James A. Wenman, Douglas R. Bray, David H. Porter
  • Patent number: 4001574
    Abstract: The present invention provides a suspension lighting fixture utilizing a chain suspension for the lamp holder, and which fixture is attached at its upper end, mechanically and electrically, to an outlet box and to conductors mounted in the ceiling, respectively. The length of the suspension chain is adjustable without requiring cutting or parting of the same. The installation may be expeditiously and cheaply made and the structure involves a minimum of materials. The invention utilizes as an essential element a hanger which is adjustable relative to the individual links of the chain employed and through which hanger the swing canopy may be clamped against the ceiling by cooperating screw threads on said hanger and on the swing canopy.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: January 4, 1977
    Assignee: Thomas Industries, Inc.
    Inventors: David H. Porter, Douglas Bray
  • Patent number: D311598
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: October 23, 1990
    Assignee: L. D. Kichler Co.
    Inventors: Fran M. Dordick, David H. Porter
  • Patent number: D313668
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: January 8, 1991
    Assignee: L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D340309
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: October 12, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D340538
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: October 19, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D340780
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: October 26, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D340781
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: October 26, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D340782
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: October 26, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D341674
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: November 23, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D342803
    Type: Grant
    Filed: July 1, 1993
    Date of Patent: December 28, 1993
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter
  • Patent number: D348951
    Type: Grant
    Filed: July 1, 1993
    Date of Patent: July 19, 1994
    Assignee: The L. D. Kichler Co.
    Inventor: David H. Porter