Patents by Inventor Bharatbhai M. Shah

Bharatbhai M. Shah 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).

  • Resistive measurement of airborne contaminants
    Patent number: 5247827
    Abstract: An apparatus and method for measuring conductive airborne particulates in which a filter (16) having a pair of interdigitated electrodes (18, 20) printed on its surface is placed in a sampling chamber (14). A pump (10) draws air (12) through the chamber and through the filter with airborne particles being deposited on the side of the filter with the electrodes. The resistance between the electrodes is measured (22) without removing the filter from the chamber.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: September 28, 1993
    Assignee: Bell Communications Research, Inc.
    Inventor: Bharatbhai M. Shah