Patents by Inventor Fredrick A. Sharp

Fredrick A. Sharp 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).

  • Dosimeter for oxides of nitrogen
    Patent number: 3992153
    Abstract: A dosimeter for the determination of integrated exposures to NO, NO.sub.2 or exposures to both gases. The dosimeter provides for a convenient and accurate method for the determination of exposures which may be encountered by workers or miners in field environments.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: November 16, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Benjamin I. Ferber, Fredrick A. Sharp, Robert W. Freedman