Patents by Inventor Marvin Keith

Marvin Keith 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).

  • Infant feeding bottle including pressure equalizing diaphragm
    Patent number: 5499729
    Abstract: An infant feeding bottle that is nipple-equipped at one end that is further equipped with a pressure equalizing apertured diaphragm member at the opposite end. The diaphragm member allows room air to pass therethrough into the air space in the bottle when the bottle is inclined and liquid is withdrawn through the nipple, thereby equalizing the interior air pressure. The diaphragm member is gas and liquid tight when the inside and outside pressures are equal and the bottle is in an upright configuration with the feeding liquid resting on the diaphragm member. The diaphragm member has a central portion which is dome configured and provided with apertures that are in a sealed shut configuration when the diaphragm member is relaxed yet that are opened when the diaphragm member is expanded responsive to differential air pressure.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: March 19, 1996
    Assignee: Children On the Go, Inc.
    Inventors: Mark H. Greenwood, Marvin Keith