Patents by Inventor Andrew Leff

Andrew Leff 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).

  • Laminated glass units
    Patent number: 4124733
    Abstract: A laminated glass windscreen comprises two sheets of glass laminated together with a layer of transparent plastics material. The inner sheet of the windscreen is of thickness in the range 0.5 mm to 3 mm and is toughened to a degree such that the central tensile stress in the glass is from 380 kg/cm.sup.2 to 1120 kg/cm.sup.2. The outer sheet may be an untoughened sheet of thickness 0.5 mm to 3.5 mm or a toughened sheet of thickness 0.5 mm to 3 mm and whose central tensile stress does not exceed 560 kg/cm.sup.2.
    Type: Grant
    Filed: May 3, 1977
    Date of Patent: November 7, 1978
    Assignee: Pilkington Brothers Limited
    Inventors: Richard Melling, Arthur J. Nobbs, Andrew Leff