Patents Assigned to Franklin GNO Corporation
  • Methods of monitoring the presence or movements of humans
    Patent number: 4195513
    Abstract: Methods in which humans or other mobile bodies are exposed to volatile tracking and marking substances, the vapors of which are detected by ionizing gaseous samples, analyzing the ions in a drift field, and detecting at least a portion of the ions.
    Type: Grant
    Filed: June 18, 1969
    Date of Patent: April 1, 1980
    Assignee: Franklin GNO Corporation
    Inventor: Martin J. Cohen