Patents by Inventor John W. Carr

John W. Carr 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).

  • Molded foam earplug and method for making same
    Patent number: 5044463
    Abstract: A bullet-shaped molded foam earplug is provided with a cavity extending from the flanged base axially into the earplug. The cavity provides the earplug a lower equilibrium pressure making the earplug more comfortable. The earplug is formed in a mold having a base containing a plurality of spaced apart cavities. A top plate having a plurality of pins is fitted onto the base such that the pins enter the mold and define the cavity of each earplug.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: September 3, 1991
    Assignee: Cabot Corporation
    Inventor: John W. Carr
  • Disposable sitz bath
    Patent number: 4324008
    Abstract: The disclosure relates to a flexible membrane configured and dimensioned so as to be capable of lining a conventional toilet bowl thereby to function as a sitz bath. The membrane extends into the toilet bowl and has an integral overflow pipe for the discharge of excess water thereby to maintain a desired water temperature and level within the bath. Adhesive tabs on the membrane secure the peripheral edge thereof to the outer side portions of the toilet bowl.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: April 13, 1982
    Inventor: John W. Carr