Patents by Inventor David J. Bressan

David J. Bressan 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).

  • Atmospheric radon monitor
    Patent number: 4140912
    Abstract: Apparatus for monitoring the radioactivity of airborne particulate matter automatically and continually filtering discrete samples of air to collect the airborne particulate matter on a filter tape and automatically detecting, counting and recording the beta emissions therefrom to determine the atmospheric radon concentration.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: February 20, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David J. Bressan, Reginald E. Larson
  • Fog-water conductivity measuring device
    Patent number: 4087743
    Abstract: A system for automatically sampling fog-water at a known rate, for determng the electrical conductivity, and for retaining fog-water samples for additional related study. The conductivity of the collected water is used to estimate total salt content of the fog and/or air, which determines the availability of salts to act as the condensation nuclei for fog and haze.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: May 2, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David J. Bressan