Patents by Inventor J. Edmund Duggan

J. Edmund Duggan 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).

  • Balancing toy set
    Patent number: 5720645
    Abstract: A balancing toy set in which a number of balancing members are interconnected on a support and are dependent upon one another for the stable equilibrium of the set. The invention can be constructed in a variety of forms ranging from a simple toy for preschool children to a complex puzzle for adults. The invention is useful both as an amusement device and as an educational tool.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: February 24, 1998
    Inventor: J. Edmund Duggan
  • Puzzle
    Patent number: D575355
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: August 19, 2008
    Inventor: J. Edmund Duggan
  • Compact disc rack
    Patent number: D387840
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: December 16, 1997
    Assignee: Edoak Designs
    Inventor: J. Edmund Duggan
  • Foldable book stand
    Patent number: D404931
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: February 2, 1999
    Inventor: J. Edmund Duggan
  • Foldable book stand
    Patent number: D404932
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: February 2, 1999
    Inventor: J Edmund Duggan
  • Ball balancing set
    Patent number: D414818
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: October 5, 1999
    Inventor: J. Edmund Duggan
  • Puzzle
    Patent number: D415215
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: October 12, 1999
    Inventor: J. Edmund Duggan