Patents by Inventor Peter B. Duffy

Peter B. 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).

  • Medical appliance for percussive respiratory therapy
    Patent number: 4429688
    Abstract: A medical appliance for use in percussive respiratory therapy comprises a partially enclosed cavity which presents a substantially circular opening bordered by an annular ring of moldably compressible material for effecting a pneumatic seal of the cavity to a body area against which it is placed. The annular ring defines a groove to communicate with a curling semi-circular lip, the ring also defining a cavity filled with a compressible gaseous vapor for cushioning the impact of the appliance with a patients's body.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: February 7, 1984
    Inventor: Peter B. Duffy
  • Medical appliance for percussive respiratory therapy
    Patent number: D274263
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: June 12, 1984
    Inventor: Peter B. Duffy
  • Medical appliance for percussive respiratory therapy
    Patent number: D274554
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: July 3, 1984
    Inventor: Peter B. Duffy