Patents by Inventor Douglas J. Davies

Douglas J. Davies 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).

  • Versatile play ball
    Patent number: 6572499
    Abstract: A variable-weight ball that is particularly useful for the development of motor skills in children of all ages is disclosed. A first inflatable bladder filled with a first gas and a second inflatable bladder filled with a second gas are disposed within an outer casing. The relative weight of the ball can be adjusted by using gases of different densities in the first and second bladders and by adjusting the amount of gas in each bladder.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: June 3, 2003
    Inventor: Douglas J. Davies
  • Versatile play ball
    Publication number: 20020077201
    Abstract: A variable-weight ball that is particularly useful for the development of motor skills in children of all ages is disclosed. A first inflatable bladder filled with a first gas and a second inflatable bladder filled with a second gas are disposed within an outer casing. The relative weight of the ball can be adjusted by using gases of different densities in the first and second bladders and by adjusting the amount of gas in each bladder.
    Type: Application
    Filed: December 15, 2000
    Publication date: June 20, 2002
    Inventor: Douglas J. Davies