Patents by Inventor Richard J. Stern

Richard J. Stern 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).

  • Air bubbling mats having heated air for therapeutically agitating bath water
    Patent number: 4962759
    Abstract: A bubbling air mat has an air hose leading to a control unit having a motor therein. A number of saftey devices are provided to prevent a user from being electrocuted if water reaches the control unit. In the most protected area within the control unit, a rope heater is provided to warm an air stream being driven by said motor and through said air hose to bubble from the air mat.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: October 16, 1990
    Assignee: Associated Mills Inc.
    Inventors: Richard J. Stern, Donald J. Kempiak
  • Water filter cartridge
    Patent number: 4814078
    Abstract: A cartridge for a water filter system has a closed housing with only an inlet and an outlet formed in the lower surface thereof. A discharge tube extends from the outlet at the bottom, through the housing, to a position near the top of the housing. There, an elongated sleeve of filter material filters the water leaving the housing. The space between the inlet and the filter sleeve is filled with three different filter materials, most of which is activated charcoal.
    Type: Grant
    Filed: September 15, 1987
    Date of Patent: March 21, 1989
    Assignee: Associated Mills Inc.
    Inventors: Richard J. Stern, Alfons Rundzaitis, Samuel F. Peterson