Patents by Inventor Donald A. Ferrett

Donald A. Ferrett 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).

  • Infrared borescope-thermal
    Patent number: 5440134
    Abstract: A test target for thermal and similar rifle sights including a target, comating lens in a housing with a mandrel type boresighting attachment.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: August 8, 1995
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Lewis E. Lough, Donald A. Ferrett
  • Visual security eyecup
    Patent number: 5408359
    Abstract: A self contained protective shutter assembly for an imager eye piece inclng an eyecup, a powered shutter, switch, power supply and interface coupling.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: April 18, 1995
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Donald A. Ferrett, Lewis E. Lough
  • Method of thermal isolation of detector elements in an uncooled staring focal plane array
    Patent number: 4927771
    Abstract: A method of thermally isolating detector elements in an uncooled focal pl array. A backfill material of arsenic trisulfide is deposited inside reticulated grooves in a detector material to provide strength prior to the step of bump bonding the detector elements of the detector material to a readout device array. After the bump bonding step, an oxygen rich gas, such as a dry oxygen and nitrogen mixture, is flowed between the detector and readout arrays to remove the arsenic trisulfide material therefrom leaving an air gap between the detector elements.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: May 22, 1990
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Donald A. Ferrett