Patents by Inventor Edward J. Efkeman

Edward J. Efkeman 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).

  • Method and apparatus for far infrared detection
    Patent number: 4363967
    Abstract: A modified thermal viewer and method of operating same for detecting and tially analyzing a cloud for the presence of certain chemical compounds, whereby the cloud is viewed through two or more band-pass filters independently and consecutively with each filter responsive to a different band of spectral radiation characteristic of the particular chemical agent of concern.
    Type: Grant
    Filed: October 7, 1980
    Date of Patent: December 14, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Edward J. Efkeman, Elliott Lloyd, Howard K. Dickson, James R. Adamson, Jr.