Patents by Inventor William P. Stephinson

William P. Stephinson 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).

  • Bullet resistant glass
    Patent number: 5368904
    Abstract: A bullet resistant glass screen is made of a number of glass sheets which can be standard thicknesses window glass, separated by air gaps. Security films, preferably made of polyester, are provided on the front and rear surfaces of the glass sheets. A pressure sensitive adhesive can be used to adhere the security films to the glass sheets. The resistance off the screen to penetration by a bullet is increased by increasing the thickness of the air gaps.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: November 29, 1994
    Inventor: William P. Stephinson