Patents by Inventor John C. Duffy

John C. Duffy 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).

  • Luff groove bracket and method
    Patent number: 5497849
    Abstract: A shiftable bracket which has a body portion essentially tubular in length but significantly higher than it is wide and considerably longer than it is wide which has a central locking plate assembly is disclosed. The central locking plate assembly, in turn, has a locking flange at its remote end and a centrally oriented bore for receiving a lock plate assembly pin. A pair of lock plates are employed which are essentially the mirror image each of the other, and which have locking flanges at the remote ends for being positioned inside of a mast. Because they are in a pair, one can be inserted inside the mast slot, then the other one inserted, and thereafter the body of the shiftable bracket moved into position in alignment with the bores in the lock plate assembly, and thereafter the lock plate assembly pin pass through the two side plate portions of the body and pivotally engage the lock plate assemblies in place.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: March 12, 1996
    Inventor: John C. Duffy
  • Chair
    Patent number: D510666
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: October 18, 2005
    Assignee: Steelcase Development Corporation
    Inventors: F. Dennie Pimental, John C. Duffy, Pamela S. Light
  • Table
    Patent number: D511911
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: November 29, 2005
    Assignee: Steelcase Development Corporation
    Inventors: Pamela S. Light, John C. Duffy, F. Dennie Pimental
  • Chair
    Patent number: D382123
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: August 12, 1997
    Assignee: Steelcase Inc.
    Inventors: F. Dennie Pimental, John C. Duffy
  • Chair
    Patent number: D417970
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: December 28, 1999
    Assignee: HON Technology Inc.
    Inventors: John C. Duffy, Dennie Pimental
  • Chair
    Patent number: D432326
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: October 24, 2000
    Assignee: HON Technology Inc.
    Inventors: John C. Duffy, Dennie Pimental