Patents by Inventor John M. Stack

John M. Stack 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 displaying a beam of light
    Patent number: 5108293
    Abstract: Apparatus for and a method of displaying a laser beam are provided. The apparatus comprises an elongate chamber which has a viewing window and which is filled with a clear aqueous suspension of a water-dispersible polymer. The laser beam is displayed by projecting it into the suspension-filled chamber through one end of the chamber.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: April 28, 1992
    Assignee: Edmund Scientific Company
    Inventors: John M. Stack, Frank S. DiMinno