Patents by Inventor Joseph B. Hoffman

Joseph B. Hoffman 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).

  • Transparency inspection method for blurriness in vehicle windscreens with elastomeric liners
    Patent number: 5621520
    Abstract: A method of determining the optical quality of blurriness in a windscreen transparency having a protective liner made of a particular material. A modulation transfer function (MTF) is measured through a clear transparency having a protective liner made of a particular material, resulting in measurements which are stored as a first data series. An MTF is measured through a degraded sample transparency having a protective liner made of the same particular material, resulting in measurements stored as a second data series. The first and second data series are combined to create a standard range template, which is stored in a data base record. An MTF is measured through an aircraft windscreen (a specimen transparency) having a protective liner made of the same particular material resulting in test measurements which are stored as a test data series.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: April 15, 1997
    Assignee: Northrop Grumman Corporation
    Inventor: Joseph B. Hoffman